RFC4319

Network Working Group C. Sikes Request for Comments: 4319 Zhone Technologies, Inc. Obsoletes: 3276 B. Ray Category: Standards Track PESA Switching Systems, Inc.

                                                             R. Abbi
                                                         Alcatel USA
                                                       December 2005

              Definitions of Managed Objects for
        High Bit-Rate DSL - 2nd generation (HDSL2) and
  Single-Pair High-Speed Digital Subscriber Line (SHDSL) Lines

Status of This Memo

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2005).

Abstract

This document defines a Management Information Base (MIB) module for use with network management protocols in the Internet community. In particular, it describes objects used for managing High Bit-Rate Digital Subscriber Line (DSL) - 2nd generation (HDSL2) and Single-Pair High-Speed Digital Subscriber Line (SHDSL) interfaces. This document introduces extensions to several objects and textual conventions defined in HDSL2-SHDSL-Line MIB (RFC 3276). This document obsoletes RFC 3276.

The Internet-Standard Management Framework

For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to Section 7 of RFC 3410 RFC3410.

Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in STD 58, RFC 2578 RFC2578, STD 58, RFC 2579 RFC2579 and STD 58, RFC 2580 RFC2580.

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 RFC2119.

Overview

This document defines a Management Information Base (MIB) module for use with network management protocols in the Internet community for the purpose of managing HDSL2/SHDSL lines.

The MIB module described in RFC 3276 RFC3276 describes objects used for managing High Bit-Rate DSL - 2nd generation (HDSL2) [T1E1.4] and Single-Pair High-Speed Digital Subscriber Line (SHDSL) interfaces [G.991.2]. These object descriptions are based upon the specifications for the HDSL2 and SHDSL Embedded Operations Channel (EOC), as defined in the American National Standards Institute (ANSI) T1E1.4/2000-006 [T1E1.4] and International Telecommunication Union (ITU) G.991.2 [G.991.2].

This document obsoletes RFC 3276 RFC3276, which supports G.shdsl in that the MIB module described herein supports G.shdsl.bis as described in the G.991.2 [G.991.2]. In addition, objects have been added to improve the management of SHDSL lines.

The MIB module is located in the MIB tree under MIB 2 transmission, as discussed in the MIB-2 Integration (RFC 2863 RFC2863) section of this document.

Relationship to Other MIBs

This section outlines the relationship of this MIB module with other MIB modules described in RFCs. Specifically, the IF-MIB, as presented in RFC 2863 RFC2863, is discussed.

General IF-MIB Integration (RFC 2863)

The HDSL2/SHDSL line MIB specifies the detailed attributes of a data interface. As such, it needs to integrate with RFC 2863 RFC2863. The IANA has assigned the following ifTypes to HDSL2 and SHDSL:

  IANAifType ::= TEXTUAL-CONVENTION
      ...
  SYNTAX INTEGER {
      ...
      hdsl2 (168), -- High Bit-Rate DSL, 2nd generation
      shdsl (169), -- Multirate HDSL2
      ...
      }

Note that the ifFixedLengthGroup from RFC 2863 RFC2863 MUST be supported and that the ifRcvAddressGroup does not apply to this MIB module.

Usage of ifTable

The MIB branch identified by this ifType contains tables appropriate for this interface type. Most such tables extend the ifEntry table and are indexed by ifIndex. For interfaces in systems implementing

this MIB module, those table entries indexed by ifIndex MUST be persistent.

The following attributes are part of the mandatory ifGeneralInformationGroup in RFC 2863 RFC2863 and are not duplicated in the HDSL2/SHDSL line MIB.

=======================================================

  ifIndex                  Interface index.

  ifDescr                  See interfaces MIB RFC2863.

  ifType                   hdsl2(168) or shdsl(169).

  ifSpeed                  Set as appropriate.
                           (This is fixed at 1552000 for HDSL2
                           lines)

  ifPhysAddress            This object MUST have an octet string
                           with zero length.

  ifAdminStatus            See interfaces MIB RFC2863.

  ifOperStatus             See interfaces MIB RFC2863.

  ifLastChange             See interfaces MIB RFC2863.

  ifName                   See interfaces MIB RFC2863.

  ifAlias                  See interfaces MIB RFC2863.

  ifLinkUpDownTrapEnable   Default to enabled(1).

  ifHighSpeed              Set as appropriate.
                           (For HDSL2 lines, this is fixed at 2)

  ifConnectorPresent       Set as appropriate.

=======================================================

                 Figure 1: Use of ifTable Objects

IANA Considerations

The HDSL2-SHDSL-LINE-MIB module requires the allocation of a single object identifier for its MODULE-IDENTITY. The IANA has allocated this object identifier in the transmission subtree (48), defined in the SNMPv2-SMI MIB module.

The assignment was in fact done when RFC 3276 was published, and this revision of the RFC does not require any new action from IANA.

Conventions Used in the MIB Module

Naming Conventions

A. xtuC refers to a central site terminal unit;

   H2TU-C for HDSL2, or STU-C for SHDSL.

B. xtuR refers to a remote site terminal unit;

   H2TU-R for HDSL2, or STU-R for SHDSL.

C. xtu refers to a terminal unit; either an xtuC or xtuR. D. xru refer to a regenerator unit;

   H2RU for HDSL2, or SRU for SHDSL.

E. xU refers to any HDSL2/SHDSL unit; either an xtu or xru. F. CRC is Cyclic Redundancy Check [G.991.2]. G. ES means Errored Second [G.991.2]. J. LOSW means Loss of Sync Word [G.991.2]. I. LOSWS means LOSW Seconds [G.991.2]. J. SES means Severely Errored Second [G.991.2]. K. SNR means Signal-to-Noise Ratio [G.991.2]. L. UAS means Unavailable Second [G.991.2].

Textual Conventions

The following textual conventions are defined to reflect the line topology in the MIB module (further discussed in the following section) and to define the behavior of the statistics to be maintained by an agent.

o Hdsl2ShdslUnitId:

  Attributes with this syntax uniquely identify each unit in an
  HDSL2/SHDSL span.  It mirrors the EOC addressing mechanism:

     xtuC(1)                - central office (CO) terminal unit
     xtuR(2)                - customer premises equipment (CPE)
                              terminal unit
     xru1(3) .. xru8(10)    - regenerators, numbered from
                              central office side

o Hdsl2ShdslUnitSide:

  Attributes with this syntax reference the two sides of a unit:

     networkSide(1)   - N in figure 2, below
     customerSide(2)  - C in figure 2, below

o Hdsl2ShdslWirePair:

  Attributes with this syntax reference the wire pairs connecting
  the units:

     wirePair1(1)   - First pair for HDSL2/SHDSL.
     wirePair2(2)   - Optional second pair for SHDSL only.
     wirePair3(3)   - Optional third pair for SHDSL.bis only.
     wirePair4(4)   - Optional fourth pair for SHDSL.bis only.

o Hdsl2ShdslTransmissionModeType:

  Attributes with this syntax specify the regional setting for an
  SHDSL line.  Specified as a BITS construct, the two mode types
  are:

     region1   - ITU-T G.991.2 Annex A
     region2   - ITU-T G.991.2 Annex B

o Hdsl2ShdslPerfCurrDayCount:

  Attributes with this syntax define the behavior of the 1-day (24
  hour) gauges found in the MIB module.

o Hdsl2Shdsl1DayIntervalCount:

  Attributes with this syntax define the behavior of the 1-day (24
  hour) interval counters found in the MIB module.

o Hdsl2ShdslPerfTimeElapsed:

  Attributes with this syntax define the behavior of the elapsed
  time counters found in the MIB module.

o Hdsl2ShdslPerfIntervalThreshold:

  Attributes with this syntax define the behavior of the alarm
  thresholds found in the MIB module.

o Hdsl2ShdslClockReferenceType:

  Attributes with this syntax define the clock references for the
  HDSL2/SHDSL span.

Structure

The MIB module is structured into the following MIB groups:

o Span Configuration Group:

  This group supports MIB objects for configuring parameters for the
  HDSL2/SHDSL span.  It contains the following table:

     - hdsl2ShdslSpanConfTable

o Span Status Group:

  This group supports MIB objects for retrieving span status
  information.  It contains the following table:

     - hdsl2ShdslSpanStatusTable

o Unit Inventory Group:

  This group supports MIB objects for retrieving unit inventory
  information about units in HDSL2/SHDSL lines via the EOC.  It
  contains the following table:

     - hdsl2ShdslInventoryTable

o Segment Endpoint Configuration Group:

  This group supports MIB objects for configuring parameters for the
  HDSL2/SHDSL segment endpoints.  It contains the following table:

     - hdsl2ShdslEndpointConfTable

o Segment Endpoint Current Status/Performance Group:

  This group supports MIB objects that provide the current status/
  performance information relating to segment endpoints.  It
  contains the following table:

     - hdsl2ShdslEndpointCurrTable

o Segment Endpoint 15-Minute Interval Status/Performance Group:

  This group supports MIB objects that provide historic status/
  performance information relating to segment endpoints in 15-minute
  intervals.  It contains the following table:

     - hdsl2Shdsl15MinIntervalTable

o Segment Endpoint 1-Day Interval Status/Performance Group:

  This group supports MIB objects that provide historic status/
  performance information relating to segment endpoints in 1-day
  intervals.  It contains the following table:

     - hdsl2Shdsl1DayIntervalTable

o Maintenance Group:

  This group supports MIB objects for performing maintenance
  operations such as loopbacks for HDSL2/SHDSL lines.  It contains
  the following table(s):

     - hdsl2ShdslEndpointMaintTable
     - hdsl2ShdslUnitMaintTable

o Span Configuration Profile Group:

  This group supports MIB objects for defining configuration
  profiles for HDSL2/SHDSL spans.  It contains the following table:

     - hdsl2ShdslSpanConfProfileTable

o Segment Endpoint Alarm Configuration Profile Group:

  This group supports MIB objects for defining alarm configuration
  profiles for HDSL2/SHDSL segment endpoints.  It contains the
  following table:

     - hdsl2ShdslEndpointAlarmConfProfileTable

o Notifications Group:

  This group defines the notifications supported for HDSL2/SHDSL
  lines:

        - hdsl2ShdslLoopAttenCrossing
        - hdsl2ShdslSNRMarginCrossing
        - hdsl2ShdslPerfESThresh
        - hdsl2ShdslPerfSESThresh
        - hdsl2ShdslPerfCRCanomaliesThresh
        - hdsl2ShdslPerfLOSWSThresh
        - hdsl2ShdslPerfUASThresh
        - hdsl2ShdslSpanInvalidNumRepeaters
        - hdsl2ShdslLoopbackFailure
        - hdsl2ShdslpowerBackoff
        - hdsl2ShdsldeviceFault

        - hdsl2ShdsldcContinuityFault
        - hdsl2ShdslconfigInitFailure
        - hdsl2ShdslprotocolInitFailure
        - hdsl2ShdslnoNeighborPresent
        - hdsl2ShdslLocalPowerLoss

o SHDSL Wire Pair Group:

  This group supports MIB objects that provide status of the SHDSL-
  specific wire pairs.

        - hdsl2ShdslEndpointCurrTipRingReversal
        - hdsl2ShdslEndpointCurrActivationState

o Payload Group:

  This group supports MIB objects for retrieving payload rates that
  exclude any framing overhead.

        - hdsl2ShdslStatusMaxAttainablePayloadRate
        - hdsl2ShdslStatusActualPayloadRate

Line Topology

An HDSL2/SHDSL line consists of a minimum of two units: xtuC (the central termination unit) and an xtuR (the remote termination unit). The line may optionally support up to 8 repeater/regenerator units (xru) as shown in the figure below.

   <-- Network Side                            Customer Side -->

   |</////////////////// HDSL2/SHDSL Span ////////////////////>|

           <Admin (talk)>       <Admin (talk)> HDSL2/SHDSL Segments  <Admin (talk)>

   +-------+   +-------+   +-------+       +-------+   +-------+
   +       C=1=N       C=1=N       C=..1..=N       C=1=N       +
   | xtuC  |   |  xru1 |   |  xru2 |       |  xru8 |   |  xtuR |
   +       C=2=N       C=2=N       C=..2..=N       C=2=N       +
   +-------+   +-------+   +-------+       +-------+   +-------+

   Key:  <////> HDSL2/SHDSL span
         <Admin (talk) 01:27, 30 October 2020 (UTC)> HDSL2/SHDSL segment
         =1=    HDSL2/SHDSL wire-pair-1
         =2=    SHDSL optional wire-pair-2 (Not applicable to HDSL2)
         C      Customer side segment endpoint (modem)
         N      Network side segment endpoint (modem)

        Figure 2: General Topology for an HDSL2/SHDSL Line

Counters, Interval Buckets, and Thresholds

For SNR Margin, Loop Attenuation, ES, SES, CRC anomalies, LOSW, and UAS, there are event counters, current 15-minute and 0 to 96 15- minute history bucket(s) of "interval-counters", as well as current and 0 to 30 previous 1-day interval-counter(s). Each current 15- minute event bucket has an associated threshold notification.

Unlike RFC 3593 RFC3593 and RFC 2662 RFC2662, there is no representation in the MIB module for invalid buckets. In those cases where the data for an interval is suspect or known to be invalid, the agent MUST NOT report the interval. If the current 15-minute event bucket is determined to be invalid, notifications based upon the value of the event bucket MUST NOT be generated.

Not reporting an interval will result in holes in the associated table. For example, the table hdsl2Shdsl15MinIntervalTable is indexed by { ifIndex, hdsl2ShdslInvIndex, hdsl2ShdslEndpointSide, hdsl2ShdslEndpointWirePair, hdsl2Shdsl15MinIntervalNumber}. If interval 12 is determined to be invalid but intervals 11 and 13 are valid, a Get Next operation on the indices .1.1.1.1.11 would return indices .1.1.1.1.13.

There is no requirement for an agent to ensure a fixed relationship between the start of a 15-minute interval and any wall clock; however, some implementations may align the 15-minute intervals with

quarter hours. Likewise, an implementation may choose to align 1-day intervals with the start of a day.

Counters are not reset when an xU is reinitialized, only when the agent is reset or reinitialized (or under specific request outside the scope of this MIB module).

Profiles

As a managed node can handle a large number of xUs (e.g., hundreds or perhaps thousands of lines), provisioning every parameter on every xU may become burdensome. Moreover, most lines are provisioned identically with the same set of parameters. To simplify the provisioning process, this MIB module makes use of profiles. A profile is a set of parameters that can be shared by multiple lines using the same configuration.

The following profiles are used in this MIB module:

o Span Configuration Profiles - Span configuration profiles contain

  parameters for configuring HDSL2/SHDSL spans.  They are defined in
  the hdsl2ShdslSpanConfProfileTable.  Since span configuration
  parameters are only applicable for SHDSL, the support for span
  configuration profiles is optional for HDSL2 interfaces.

  Note that the configuration of the span dictates the behavior for
  each individual segment endpoint in the span.  If a different
  configuration is provisioned for any given segment endpoint within
  the span, the new configuration for this segment endpoint will
  override the span configuration for this segment endpoint only.

o Segment Endpoint Alarm Configuration Profiles - These profiles

  contain parameters for configuring alarm thresholds for HDSL2/
  SHDSL segment endpoints.  These profiles are defined in the
  hdsl2ShdslEndpointAlarmConfProfileTable.

  The index value for this profile is a locally-unique
  administratively-assigned name for the profile having the textual
  convention 'SnmpAdminString' (RFC 3411 RFC3411).

One or more lines may be configured to share parameters of a single profile (e.g., hdsl2ShdslEndpointAlarmConfProfile = 'silver') by setting its hdsl2ShdslEndpointAlarmConfProfile objects to the value of this profile. If a change is made to the profile, all lines that refer to it will be reconfigured to the changed parameters. Before a profile can be deleted or taken out of service, it must be first unreferenced from all associated lines.

Implementations MUST provide a default profile whose name is 'DEFVAL' for each profile type. The values of the associated parameters will be vendor specific unless otherwise indicated in this document. Before a line's profiles have been set, these profiles will be automatically used by setting hdsl2ShdslEndpointAlarmConfProfile and hdsl2ShdslSpanConfProfile to 'DEFVAL' where appropriate. This default profile name, 'DEFVAL', is considered reserved in the context of profiles defined in this MIB module.

Profiles are created, assigned, and deleted dynamically using the profile name and profile row status in each of the four profile tables.

Profile changes MUST take effect immediately. These changes MAY result in a restart (hard reset or soft restart) of the units on the line.

Notifications

The ability to generate the SNMP notifications coldStart/warmStart (per RFC3418), which are per agent (e.g., per Digital Subscriber Line Access Multiplexer, or DSLAM, in such a device), and linkUp/ linkDown (per RFC2863), which are per interface (i.e., HDSL2/SHDSL line) is required.

A linkDown notification MAY be generated whenever any ES, SES, CRC anomaly, LOSW, or UAS event occurs. The corresponding linkUp notification MAY be sent when all link failure conditions are cleared.

The notifications defined in this MIB module are for initialization failure and for the threshold crossings associated with the following events: ES, SES, CRC anomaly, LOSW, and UAS. Each threshold has its own enable/threshold value. When that value is 0, the notification is disabled.

The hdsl2ShdslEndpointCurrStatus is a bitmask representing all outstanding error conditions associated with a particular segment endpoint. Note that since the status of remote endpoints is obtained via the EOC, this information may be unavailable for units that are unreachable via EOC during a line error condition. Therefore, not all conditions may always be included in its current status. Notifications corresponding to the bit fields in this object are defined.

Two alarm conditions, SNR Margin Alarm and Loop Attenuation Alarm, are organized in a manner slightly different from that implied in the EOC specifications. In the MIB module, these alarm conditions are

tied to the two thresholds, hdsl2ShdslEndpointThreshSNRMargin and hdsl2ShdslEndpointThreshLoopAttenuation, found in the hdsl2ShdslEndpointAlarmConfProfileTable. In the EOC, the alarm conditions associated with these thresholds are per unit. In the MIB module, these alarm conditions are per endpoint. For terminal units, this has no impact. For repeaters, this implies an implementation variance where the agent in the terminal unit is responsible for detecting a threshold crossing. As the reporting of a repeater detected alarm condition to the polling terminal unit occurs in the same EOC message as the reporting of the current SNR Margin and Loop Attenuation values, it is anticipated that this will have very little impact on agent implementation.

A threshold notification occurs whenever the corresponding current 15-minute interval error counter becomes equal to, or exceeds, the threshold value. Only one notification SHOULD be sent per interval per interface. Since the current 15-minute counter is reset to 0 every 15 minutes, and if the condition persists, the notification may recur as often as every 15 minutes. For example, to get a notification whenever a "loss of" event occurs (but at most once every 15 minutes), set the corresponding threshold to 1. The agent will generate a notification when the event originally occurs.

Notifications, other than the threshold notifications listed above, SHOULD be rate limited (throttled) such that there is at least a 1-minute gap between the generation of consecutive notifications of the same event. When notifications are rate limited, they are dropped and not queued for sending at a future time. This is intended to be a general rate-limiting statement for notifications that have no explicit rate-limiting assertions in this document otherwise.

Note that the Network Management System, or NMS, may receive a linkDown notification as well, if enabled (via ifLinkUpDownTrapEnable RFC2863). At the beginning of the next 15-minute interval, the counter is reset. When the first second goes by and the event occurs, the current interval bucket will be 1, which equals the threshold, and the notification will be sent again.

An hdsl2ShdslSpanInvalidNumRepeaters notification may be generated following completion of the discovery phase if the number of repeaters discovered on the line differs from the number of repeaters specified in hdsl2ShdslSpanConfNumRepeaters. For those conditions where the number of provisioned repeaters is greater than those encountered during span discovery, all table entries associated with the nonexistent repeaters are to be discarded. For those conditions where the number of provisioned repeaters is less than those

encountered during span discovery, additional table entries are to be created using the default span configuration profile.

Definitions

HDSL2-SHDSL-LINE-MIB DEFINITIONS ::= BEGIN

IMPORTS

  MODULE-IDENTITY,
  OBJECT-TYPE,
  Counter32,
  Unsigned32,
  Gauge32,
  NOTIFICATION-TYPE,
  Integer32,
  transmission
     FROM SNMPv2-SMI
  RowStatus,
  TEXTUAL-CONVENTION
     FROM SNMPv2-TC
  ifIndex
     FROM IF-MIB
  PerfCurrentCount,
  PerfIntervalCount
     FROM PerfHist-TC-MIB
  SnmpAdminString
     FROM SNMP-FRAMEWORK-MIB
  MODULE-COMPLIANCE,
  OBJECT-GROUP,
  NOTIFICATION-GROUP
     FROM SNMPv2-CONF;

hdsl2ShdslMIB MODULE-IDENTITY

  LAST-UPDATED "200512070000Z" -- December 7, 2005
  ORGANIZATION "ADSLMIB Working Group"
  CONTACT-INFO "WG-email:  [email protected]
     WG-URL:
        http://www.ietf.org/html.charters/adslmib-charter.html
     Info:       https://www1.ietf.org/mailman/listinfo/adslmib
     Chair:      Mike Sneed
                 Sand Channel Systems
     Postal:     1210-203 Westview Ln
                 Raleigh NC 27605  USA
     Email:      [email protected]
     Phone:     +1 206 600 7022

     Co-Chair    Bob Ray
                 PESA Switching Systems, Inc.

     Postal      330-A Wynn Drive
                 Huntsville, AL 35805 USA
     Phone       +1 256 726 9200 ext. 142

     Co-editor:  Clay Sikes
                 Zhone Technologies, Inc.
     Postal:     8545 126th Ave. N.
                 Largo, FL 33772 USA
     Email:      [email protected]
     Phone:      +1 727 530 8257

     Co-editor:  Bob Ray
                 PESA Switching Systems, Inc.
     Postal:     330-A Wynn Drive
                 Huntsville, AL 35805 USA
     Email:      [email protected]
     Phone:      +1 256 726 9200 ext. 142

     Co-editor:  Rajesh Abbi
                 Alcatel USA
     Postal:     2301 Sugar Bush Road
                 Raleigh, NC 27612-3339 USA

     Email:      [email protected]
     Phone:      +1 919 850 6194"

DESCRIPTION

    "This MIB module defines a collection of objects for managing
     HDSL2/SHDSL lines.  An agent may reside at either end of the
     line; however, the MIB module is designed to require no
     management communication between the modems beyond that
     inherent in the low-level EOC line protocol as defined in
     ANSI T1E1.4/2000-006 (for HDSL2 lines) or in ITU G.991.2
     (for SHDSL lines).

     Copyright (C) The Internet Society (2005).  This version of
     this MIB module is part of RFC 4319; see the RFC itself for
     full legal notices."

REVISION "200512070000Z" -- December 7, 2005 DESCRIPTION "This version, published as RFC 4319.

     The following changes have been made in this version:
       1.  Added a 3rd and 4th wire pair.
       2.  Modified all rates such that their rates are only
           constrained by an unsigned 32-bit value and not by
           what today's perceived technology limitations are.

       3.  Clarified that the rates from RFC 3276 include
           payload and any applicable framing and added
           objects for payload-only rates.
       4.  Added an object to indicate whether the
           tip and ring are reversed on a wire pair.
       5.  Added an object to display the activation state
           of a wire pair.
       6.  Added references as necessary for clarification.
       7.  Added display hints to textual conventions as
           necessary.
       8.  Updated conformance statements as necessary.
       9.  Some changes were due to IETF requirements and
           RFC generation tools."

REVISION "200205090000Z" -- May 9, 2002 DESCRIPTION "Initial version, published as RFC 3276."

= { transmission 48 }

hdsl2ShdslMibObjects OBJECT IDENTIFIER ::= { hdsl2ShdslMIB 1 }

-- Textual Conventions used in this MIB module --

Hdsl2ShdslPerfCurrDayCount ::= TEXTUAL-CONVENTION

  DISPLAY-HINT "d"
  STATUS    current
  DESCRIPTION
    "A gauge associated with interface performance measurements in
     a current 1-day (24 hour) measurement interval.

     The value of this gauge starts at zero at the beginning of an
     interval and is increased when associated events occur, until
     the end of the 1-day interval.  At that time, the value of the
     gauge is stored in the previous 1-day history interval, as
     defined in a companion object of type
     Hdsl2Shdsl1DayIntevalCount, and the current interval gauge
     is restarted at zero.

     In the case where the agent has no valid data available for
     this interval, the corresponding object instance is not
     available, and upon a retrieval request, a corresponding error
     message shall be returned to indicate that this instance does
     not exist.  Please note that zero is a valid value."
  SYNTAX  Gauge32

Hdsl2Shdsl1DayIntervalCount ::= TEXTUAL-CONVENTION

  DISPLAY-HINT "d"

  STATUS    current
  DESCRIPTION
    "A counter associated with interface performance measurements
     during the most previous 1-day (24 hour) measurement interval.
     The value of this gauge is equal to the value of the current
     day gauge, as defined in a companion object of type
     Hdsl2ShdslPerfCurrDayCount, at the end of its most recent
     interval.

     In the case where the agent has no valid data available for
     this interval, the corresponding object instance is not
     available, and upon a retrieval request, a corresponding error
     message shall be returned to indicate that this instance does
     not exist."
  SYNTAX  Gauge32

Hdsl2ShdslPerfTimeElapsed ::= TEXTUAL-CONVENTION

  DISPLAY-HINT "d"
  STATUS    current
  DESCRIPTION
    "The number of seconds that have elapsed since the beginning of
     the current measurement period.  If, for some reason, such as
     an adjustment in the system's time-of-day clock or the addition
     of a leap second, the current interval exceeds the maximum
     value, the agent will return the maximum value.

     For 15-minute intervals, the range is limited to (0..899).
     For 24-hour intervals, the range is limited to (0..86399)."
  SYNTAX    Unsigned32(0..86399)

Hdsl2ShdslPerfIntervalThreshold ::= TEXTUAL-CONVENTION

  DISPLAY-HINT "d"
  STATUS    current
  DESCRIPTION
    "This convention defines a range of values that may be set in
     a fault threshold alarm control.  As the number of seconds in
     a 15-minute interval numbers at most 900, objects of this type
     may have a range of 0...900, where the value of 0 disables the
     alarm."
  SYNTAX    Unsigned32(0..900)

Hdsl2ShdslUnitId ::= TEXTUAL-CONVENTION

  STATUS    current
  DESCRIPTION
    "This is the unique identification for all units in an
     HDSL2/SHDSL span.  It is based on the EOC unit addressing
     scheme with reference to the xtuC."
  SYNTAX    INTEGER

          {
          xtuC(1),
          xtuR(2),
          xru1(3),
          xru2(4),
          xru3(5),
          xru4(6),
          xru5(7),
          xru6(8),
          xru7(9),
          xru8(10)
          }

Hdsl2ShdslUnitSide ::= TEXTUAL-CONVENTION

  STATUS    current
  DESCRIPTION
    "This is the referenced side of an HDSL2/SHDSL unit - Network
     or Customer side.  The side facing the Network is the Network
     side, while the side facing the Customer is the Customer side."
  SYNTAX    INTEGER
          {
          networkSide(1),
          customerSide(2)
          }

Hdsl2ShdslWirePair ::= TEXTUAL-CONVENTION

  STATUS    current
  DESCRIPTION
    "This is the referenced pair of wires in an HDSL2/SHDSL segment.
     HDSL2 only supports a single pair (wirePair1 or two wire),
     SHDSL lines support an optional second pair (wirePair2 or four
     wire), and G.shdsl.bis support an optional third pair
     (wirePair3 or six wire) and an optional fourth pair
     (wirePair4 or eight wire)."
  SYNTAX    INTEGER
          {
          wirePair1(1),    -- two wire
          wirePair2(2),    -- four wire
          wirePair3(3),    -- six wire
          wirePair4(4)     -- eight wire
          }

Hdsl2ShdslTransmissionModeType ::= TEXTUAL-CONVENTION

  STATUS    current
  DESCRIPTION
    "Contains the regional setting of the HDSL2/SHDSL span,
     represented as a bit-map of possible settings.  The various
     bit positions are as follows:

     Bit   Meaning      Description
     1     region 1     Indicates ITU-T G.991.2 Annex A.
     2     region 2     Indicates ITU-T G.991.2 Annex B."
  SYNTAX      BITS
          {
          region1(0),
          region2(1)
          }

Hdsl2ShdslClockReferenceType ::= TEXTUAL-CONVENTION

  STATUS    current
  DESCRIPTION
    "The various STU-C symbol clock references for the
     HDSL2/SHDSL span, represented as an enumeration."
  SYNTAX    INTEGER
         {
         localClk(1),          -- Mode-1 per G991.2
         networkClk(2),        -- Mode-2 per G991.2
         dataOrNetworkClk(3),  -- Mode-3a per G991.2
         dataClk(4)            -- Mode-3b per G991.2
         }

-- Span Configuration Group --

hdsl2ShdslSpanConfTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF Hdsl2ShdslSpanConfEntry
  MAX-ACCESS not-accessible
  STATUS     current

  DESCRIPTION
    "This table supports overall configuration of HDSL2/SHDSL
     spans.  Entries in this table MUST be maintained in a
     persistent manner."
  ::= { hdsl2ShdslMibObjects 1 }

hdsl2ShdslSpanConfEntry OBJECT-TYPE

  SYNTAX      Hdsl2ShdslSpanConfEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "An entry in the hdsl2ShdslSpanConfTable.  Each entry
     represents the complete span in a single HDSL2/SHDSL line.
     It is indexed by the ifIndex of the associated HDSL2/SHDSL
     line."
  INDEX { ifIndex }
  ::= { hdsl2ShdslSpanConfTable 1 }

Hdsl2ShdslSpanConfEntry ::=

  SEQUENCE
  {
  hdsl2ShdslSpanConfNumRepeaters          Unsigned32,
  hdsl2ShdslSpanConfProfile               SnmpAdminString,
  hdsl2ShdslSpanConfAlarmProfile          SnmpAdminString
  }

  hdsl2ShdslSpanConfNumRepeaters OBJECT-TYPE
  SYNTAX      Unsigned32(0..8)
  UNITS       "repeaters"
  MAX-ACCESS  read-write
  STATUS      current
  DESCRIPTION
    "This object provisions the number of repeaters/regenerators
     in this HDSL2/SHDSL span."
  ::= { hdsl2ShdslSpanConfEntry 1 }

hdsl2ShdslSpanConfProfile OBJECT-TYPE

  SYNTAX      SnmpAdminString (SIZE(1..32))
  MAX-ACCESS  read-write
  STATUS      current
  DESCRIPTION
    "This object is a pointer to a span configuration profile in
     the hdsl2ShdslSpanConfProfileTable, which applies to this
     span.  The value of this object is the index of the referenced
     profile in the hdsl2ShdslSpanConfProfileTable.  Note that span
     configuration profiles are only applicable to SHDSL lines.

     HDSL2 lines MUST reference the default profile, 'DEFVAL'.
     By default, this object will have the value 'DEFVAL'
     (the index of the default profile).

     Any attempt to set this object to a value that is not the value
     of the index for an active entry in the profile table,
     hdsl2ShdslSpanConfProfileTable, MUST be rejected."
  ::= { hdsl2ShdslSpanConfEntry 2 }

hdsl2ShdslSpanConfAlarmProfile OBJECT-TYPE

  SYNTAX      SnmpAdminString (SIZE(1..32))
  MAX-ACCESS  read-write
  STATUS      current
  DESCRIPTION
    "This object is a pointer to an alarm configuration profile in
     the hdsl2ShdslEndpointAlarmConfProfileTable.  The value of
     this object is the index of the referenced profile in the
     hdsl2ShdslEndpointAlarmConfProfileTable.  The alarm
     threshold configuration in the referenced profile will be

     used by default for all segment endpoints in this span.
     Individual endpoints may override this profile by explicitly
     specifying some other profile in the
     hdsl2ShdslEndpointConfTable.  By default, this object will
     have the value 'DEFVAL' (the index of the default
     profile).

     Any attempt to set this object to a value that is not the value
     of the index for an active entry in the profile table,
     hdsl2ShdslEndpointAlarmConfProfileTable, MUST be rejected."
  ::= { hdsl2ShdslSpanConfEntry 3 }

-- Span Status Group --

hdsl2ShdslSpanStatusTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF Hdsl2ShdslSpanStatusEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
    "This table provides overall status information of
     HDSL2/SHDSL spans.  This table contains live data from
     equipment.  As such, it is NOT persistent."
  ::= { hdsl2ShdslMibObjects 2 }

hdsl2ShdslSpanStatusEntry OBJECT-TYPE

  SYNTAX      Hdsl2ShdslSpanStatusEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "An entry in the hdsl2ShdslSpanStatusTable.  Each entry
     represents the complete span in a single HDSL2/SHDSL line.
     It is indexed by the ifIndex of the associated HDSL2/SHDSL
     line."
  INDEX { ifIndex }
  ::= { hdsl2ShdslSpanStatusTable 1 }

Hdsl2ShdslSpanStatusEntry ::=

  SEQUENCE
  {
  hdsl2ShdslStatusNumAvailRepeaters        Unsigned32,
  hdsl2ShdslStatusMaxAttainableLineRate    Unsigned32,
  hdsl2ShdslStatusActualLineRate           Unsigned32,
  hdsl2ShdslStatusTransmissionModeCurrent
                       Hdsl2ShdslTransmissionModeType,
  hdsl2ShdslStatusMaxAttainablePayloadRate Unsigned32,
  hdsl2ShdslStatusActualPayloadRate        Unsigned32
  }

hdsl2ShdslStatusNumAvailRepeaters OBJECT-TYPE

  SYNTAX      Unsigned32(0..8)
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Contains the actual number of repeaters/regenerators
     discovered in this HDSL2/SHDSL span."
  ::= { hdsl2ShdslSpanStatusEntry 1 }

hdsl2ShdslStatusMaxAttainableLineRate OBJECT-TYPE

  SYNTAX      Unsigned32(0..4294967295)
  UNITS       "bps"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Contains the maximum attainable line rate in this HDSL2/SHDSL
     span.  This object provides the maximum rate the line is
     capable of achieving.  This is based upon measurements made
     during line probing.  This rate includes payload (user data)
     and any applicable framing overhead."
  ::= { hdsl2ShdslSpanStatusEntry 2 }

hdsl2ShdslStatusActualLineRate OBJECT-TYPE

  SYNTAX      Unsigned32(0..4294967295)
  UNITS       "bps"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Contains the actual line rate in this HDSL2/SHDSL span.  This
     SHOULD equal ifSpeed.  This rate includes payload (user data)
     and any applicable framing overhead"
  ::= { hdsl2ShdslSpanStatusEntry 3 }

hdsl2ShdslStatusTransmissionModeCurrent OBJECT-TYPE

  SYNTAX      Hdsl2ShdslTransmissionModeType
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Contains the current Power Spectral Density (PSD) regional
     setting of the HDSL2/SHDSL span."
  ::= { hdsl2ShdslSpanStatusEntry 4 }

hdsl2ShdslStatusMaxAttainablePayloadRate OBJECT-TYPE

  SYNTAX      Unsigned32(0..4294967295)
  UNITS       "bps"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION

    "Contains the maximum attainable payload (user data)
     line rate in this HDSL2/SHDSL span.  This object provides
     the maximum rate the line is capable of achieving.  This
     is based upon measurements made during line probing.  Any
     framing overhead is not included."
  ::= { hdsl2ShdslSpanStatusEntry 5 }

hdsl2ShdslStatusActualPayloadRate OBJECT-TYPE

  SYNTAX      Unsigned32(0..4294967295)
  UNITS       "bps"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Contains the actual line rate in this HDSL2/SHDSL span.  Any
     framing overhead is not included."
  ::= { hdsl2ShdslSpanStatusEntry 6 }

-- Unit Inventory Group --

hdsl2ShdslInventoryTable OBJECT-TYPE

  SYNTAX     SEQUENCE OF Hdsl2ShdslInventoryEntry
  MAX-ACCESS not-accessible
  STATUS     current
  DESCRIPTION
    "This table supports retrieval of unit inventory information
     available via the EOC from units in an HDSL2/SHDSL line.

     Entries in this table are dynamically created during the
     line discovery process.  The life cycle for these entries
     is as follows:

        - xtu discovers a device, either a far-end xtu or an xru
        - an inventory table entry is created for the device
        - the line goes down for whatever reason
        - inventory table entries for unreachable devices are
          destroyed

     As these entries are created/destroyed dynamically, they
     are NOT persistent."
  ::= { hdsl2ShdslMibObjects 3 }

hdsl2ShdslInventoryEntry OBJECT-TYPE

  SYNTAX      Hdsl2ShdslInventoryEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "An entry in the hdsl2ShdslInventoryTable.  Each entry

     represents inventory information for a single unit in an
     HDSL2/SHDSL line.  It is indexed by the ifIndex of the
     HDSL2/SHDSL line and the Hdsl2ShdslUnitId of the
     associated unit."
  INDEX { ifIndex, hdsl2ShdslInvIndex }
  ::= { hdsl2ShdslInventoryTable 1 }

Hdsl2ShdslInventoryEntry ::=

  SEQUENCE
  {
  hdsl2ShdslInvIndex                      Hdsl2ShdslUnitId,
  hdsl2ShdslInvVendorID                   OCTET STRING,
  hdsl2ShdslInvVendorModelNumber          OCTET STRING,
  hdsl2ShdslInvVendorSerialNumber         OCTET STRING,
  hdsl2ShdslInvVendorEOCSoftwareVersion   Integer32,
  hdsl2ShdslInvStandardVersion            Integer32,
  hdsl2ShdslInvVendorListNumber           OCTET STRING,
  hdsl2ShdslInvVendorIssueNumber          OCTET STRING,
  hdsl2ShdslInvVendorSoftwareVersion      OCTET STRING,
  hdsl2ShdslInvEquipmentCode              OCTET STRING,
  hdsl2ShdslInvVendorOther                OCTET STRING,
  hdsl2ShdslInvTransmissionModeCapability
                        Hdsl2ShdslTransmissionModeType
  }

hdsl2ShdslInvIndex OBJECT-TYPE

  SYNTAX      Hdsl2ShdslUnitId
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "Each entry in this table corresponds to a physical element
     in an HDSL2/SHDSL span.  It is based on the EOC unit addressing
     scheme with reference to the xtuC."
  ::= { hdsl2ShdslInventoryEntry 1 }

hdsl2ShdslInvVendorID OBJECT-TYPE

  SYNTAX      OCTET STRING(SIZE(8))
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Vendor ID as reported in an Inventory Response message."
  REFERENCE
    "G.991.2, Section 9.5.5.7.4, Inventory response - Message ID
     130, Octets 25-32."
  ::= { hdsl2ShdslInventoryEntry 2 }

hdsl2ShdslInvVendorModelNumber OBJECT-TYPE

  SYNTAX      OCTET STRING(SIZE(12))

  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Vendor model number as reported in an Inventory Response
     message."
  REFERENCE
    "G.991.2, Section 9.5.5.7.4, Inventory response - Message ID
     130, Octets 33-44."
  ::= { hdsl2ShdslInventoryEntry 3 }

hdsl2ShdslInvVendorSerialNumber OBJECT-TYPE

  SYNTAX      OCTET STRING(SIZE(12))
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Vendor serial number as reported in an Inventory Response
     message."
  REFERENCE
    "G.991.2, Section 9.5.5.7.4, Inventory response - Message ID
     130, Octets 45-56."
  ::= { hdsl2ShdslInventoryEntry 4 }

hdsl2ShdslInvVendorEOCSoftwareVersion OBJECT-TYPE

  SYNTAX      Integer32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Vendor EOC version as reported in a Discovery Response
     message."
  REFERENCE
    "G.991.2, Section 9.5.5.7.2, Discovery response - Message ID
     129, Octet 12."
  ::= { hdsl2ShdslInventoryEntry 5 }

hdsl2ShdslInvStandardVersion OBJECT-TYPE

  SYNTAX      Integer32
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Version of the HDSL2/SHDSL standard implemented, as reported
     in an Inventory Response message."
  REFERENCE
    "G.991.2, Section 9.5.5.7.4, Inventory response - Message ID
     130, Octet 2."
  ::= { hdsl2ShdslInventoryEntry 6 }

hdsl2ShdslInvVendorListNumber OBJECT-TYPE

  SYNTAX      OCTET STRING(SIZE(3))

  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Vendor list number as reported in an Inventory Response
     message."
  REFERENCE
    "G.991.2, Section 9.5.5.7.4, Inventory response - Message ID
     130, Octets 3-5."
  ::= { hdsl2ShdslInventoryEntry 7 }

hdsl2ShdslInvVendorIssueNumber OBJECT-TYPE

  SYNTAX      OCTET STRING(SIZE(2))
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Vendor issue number as reported in an Inventory Response
     message."
  REFERENCE
    "G.991.2, Section 9.5.5.7.4, Inventory response - Message ID
     130, Octets 6-7."
  ::= { hdsl2ShdslInventoryEntry 8 }

hdsl2ShdslInvVendorSoftwareVersion OBJECT-TYPE

  SYNTAX      OCTET STRING(SIZE(6))
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Vendor software version as reported in an Inventory Response
     message."
  REFERENCE
    "G.991.2, Section 9.5.5.7.4, Inventory response - Message ID
     130, Octets 8-13."
  ::= { hdsl2ShdslInventoryEntry 9 }

hdsl2ShdslInvEquipmentCode OBJECT-TYPE

  SYNTAX      OCTET STRING(SIZE(10))
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Equipment code conforming to ANSI T1.213, Coded Identification
     of Equipment Entities."
  REFERENCE
    "G.991.2, Section 9.5.5.7.4, Inventory response - Message ID
     130, Octets 14-23."
  ::= { hdsl2ShdslInventoryEntry 10 }

hdsl2ShdslInvVendorOther OBJECT-TYPE

  SYNTAX      OCTET STRING(SIZE(12))

  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Other vendor information as reported in an Inventory Response
     message."
  REFERENCE
    "G.991.2, Section 9.5.5.7.4, Inventory response - Message ID
     130, Octets 57-68."
  ::= { hdsl2ShdslInventoryEntry 11 }

hdsl2ShdslInvTransmissionModeCapability OBJECT-TYPE

  SYNTAX      Hdsl2ShdslTransmissionModeType
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Contains the transmission mode capability of the SHDSL unit."
  ::= { hdsl2ShdslInventoryEntry 12 }

-- Segment Endpoint Configuration Group --

hdsl2ShdslEndpointConfTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF Hdsl2ShdslEndpointConfEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "This table supports configuration parameters for segment
     endpoints in an HDSL2/SHDSL line.  As this table is indexed
     by ifIndex, it MUST be maintained in a persistent manner."
  ::= { hdsl2ShdslMibObjects 4 }

hdsl2ShdslEndpointConfEntry OBJECT-TYPE

  SYNTAX      Hdsl2ShdslEndpointConfEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "An entry in the hdsl2ShdslEndpointConfTable.  Each entry
     represents a single segment endpoint in an HDSL2/SHDSL line.
     It is indexed by the ifIndex of the HDSL2/SHDSL line, the
     UnitId of the associated unit, the side of the unit, and the
     wire pair of the associated modem."
  INDEX { ifIndex, hdsl2ShdslInvIndex, hdsl2ShdslEndpointSide,
          hdsl2ShdslEndpointWirePair}
  ::= { hdsl2ShdslEndpointConfTable 1 }

Hdsl2ShdslEndpointConfEntry ::=

  SEQUENCE
  {

  hdsl2ShdslEndpointSide                   Hdsl2ShdslUnitSide,
  hdsl2ShdslEndpointWirePair               Hdsl2ShdslWirePair,
  hdsl2ShdslEndpointAlarmConfProfile       SnmpAdminString
  }

hdsl2ShdslEndpointSide OBJECT-TYPE

  SYNTAX      Hdsl2ShdslUnitSide
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "The side of the unit associated with this segment endpoint --
     Network/Customer side -- as per the Hdsl2ShdslUnitSide textual
     convention."
  ::= { hdsl2ShdslEndpointConfEntry 1 }

hdsl2ShdslEndpointWirePair OBJECT-TYPE

  SYNTAX      Hdsl2ShdslWirePair
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "The wire pair of the modem associated with this segment
     endpoint as per the Hdsl2ShdslWirePair textual convention."
  ::= { hdsl2ShdslEndpointConfEntry 2 }

hdsl2ShdslEndpointAlarmConfProfile OBJECT-TYPE

  SYNTAX      SnmpAdminString (SIZE(0..32))
  MAX-ACCESS  read-write
  STATUS      current
  DESCRIPTION
    "This object configures the alarm threshold values to be used
     for this segment endpoint.  The values are obtained from the
     alarm configuration profile referenced by this object.  The
     value of this object is the index of the referenced profile in
     the hdsl2ShdslEndpointAlarmConfProfileTable, or NULL (a
     zero-length SnmpAdminString).  If the value is a zero-length
     SnmpAdminString, the endpoint uses the default Alarm
     Configuration Profile for the associated span as per the
     hdsl2ShdslSpanConfAlarmProfile object in the
     hdsl2ShdslSpanConfTable.  The default value of this object is
     a zero-length SnmpAdminString.

     Any attempt to set this object to a value that is not the value
     of the index for an active entry in the profile table,
     hdsl2ShdslEndpointAlarmConfProfileTable, MUST be rejected."
  ::= { hdsl2ShdslEndpointConfEntry 3 }

-- Segment Endpoint Current Status/Performance Group --

hdsl2ShdslEndpointCurrTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF Hdsl2ShdslEndpointCurrEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "This table contains current status and performance information
     for segment endpoints in HDSL2/SHDSL lines.  As with other
     tables in this MIB module indexed by ifIndex, entries in this
     table MUST be maintained in a persistent manner."
  ::= { hdsl2ShdslMibObjects 5 }

hdsl2ShdslEndpointCurrEntry OBJECT-TYPE

  SYNTAX      Hdsl2ShdslEndpointCurrEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "An entry in the hdsl2ShdslEndpointCurrTable.  Each entry
     contains status and performance information relating to a
     single segment endpoint.  It is indexed by the ifIndex of the
     HDSL2/SHDSL line, the UnitId of the associated unit, the side
     of the unit, and the wire pair of the associated modem."
  INDEX { ifIndex, hdsl2ShdslInvIndex, hdsl2ShdslEndpointSide,
          hdsl2ShdslEndpointWirePair }
  ::= { hdsl2ShdslEndpointCurrTable 1 }

Hdsl2ShdslEndpointCurrEntry ::=

  SEQUENCE
  {
  hdsl2ShdslEndpointCurrAtn                Integer32,
  hdsl2ShdslEndpointCurrSnrMgn             Integer32,
  hdsl2ShdslEndpointCurrStatus             BITS,
  hdsl2ShdslEndpointES                     Counter32,
  hdsl2ShdslEndpointSES                    Counter32,
  hdsl2ShdslEndpointCRCanomalies           Counter32,
  hdsl2ShdslEndpointLOSWS                  Counter32,
  hdsl2ShdslEndpointUAS                    Counter32,
  hdsl2ShdslEndpointCurr15MinTimeElapsed
                           Hdsl2ShdslPerfTimeElapsed,
  hdsl2ShdslEndpointCurr15MinES            PerfCurrentCount,
  hdsl2ShdslEndpointCurr15MinSES           PerfCurrentCount,
  hdsl2ShdslEndpointCurr15MinCRCanomalies  PerfCurrentCount,
  hdsl2ShdslEndpointCurr15MinLOSWS         PerfCurrentCount,
  hdsl2ShdslEndpointCurr15MinUAS           PerfCurrentCount,
  hdsl2ShdslEndpointCurr1DayTimeElapsed
                                  Hdsl2ShdslPerfTimeElapsed,
  hdsl2ShdslEndpointCurr1DayES
                                 Hdsl2ShdslPerfCurrDayCount,
  hdsl2ShdslEndpointCurr1DaySES

                                 Hdsl2ShdslPerfCurrDayCount,
  hdsl2ShdslEndpointCurr1DayCRCanomalies
                                 Hdsl2ShdslPerfCurrDayCount,
  hdsl2ShdslEndpointCurr1DayLOSWS
                                 Hdsl2ShdslPerfCurrDayCount,
  hdsl2ShdslEndpointCurr1DayUAS
                                 Hdsl2ShdslPerfCurrDayCount,
  hdsl2ShdslEndpointCurrTipRingReversal    INTEGER,
  hdsl2ShdslEndpointCurrActivationState    INTEGER
  }

hdsl2ShdslEndpointCurrAtn OBJECT-TYPE

  SYNTAX      Integer32(-127..128)
  UNITS       "dB"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "The current loop attenuation for this endpoint as reported in
     a Network or Customer Side Performance Status message."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 1 }

hdsl2ShdslEndpointCurrSnrMgn OBJECT-TYPE

  SYNTAX      Integer32(-127..128)
  UNITS       "dB"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "The current SNR margin for this endpoint as reported in a
     Status Response/SNR message."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 2 }

hdsl2ShdslEndpointCurrStatus OBJECT-TYPE

  SYNTAX      BITS
              {
              noDefect(0),
              powerBackoff(1),
              deviceFault(2),
              dcContinuityFault(3),
              snrMarginAlarm(4),
              loopAttenuationAlarm(5),
              loswFailureAlarm(6),
              configInitFailure(7),
              protocolInitFailure(8),
              noNeighborPresent(9),
              loopbackActive(10)
              }

  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Contains the current state of the endpoint.  This is a
     bit-map of possible conditions.  The various bit positions
     are as follows:

     noDefect               There are no defects on the line.

     powerBackoff           Indicates enhanced Power Backoff.

     deviceFault            Indicates that a vendor-dependent
                            diagnostic or self-test fault
                            has been detected.

     dcContinuityFault      Indicates vendor-dependent
                            conditions that interfere with
                            span powering such as short and
                            open circuits.

     snrMarginAlarm         Indicates that the SNR margin
                            has dropped below the alarm threshold.

     loopAttenuationAlarm   Indicates that the loop attenuation
                            exceeds the alarm threshold.

     loswFailureAlarm       Indicates a forward LOSW alarm.

     configInitFailure      Endpoint failure during initialization
                            due to paired endpoint not able to
                            support requested configuration.

     protocolInitFailure    Endpoint failure during initialization
                            due to incompatible protocol used by
                            the paired endpoint.

     noNeighborPresent      Endpoint failure during initialization
                            due to no activation sequence detected
                            from paired endpoint.

     loopbackActive         A loopback is currently active at this
                            segment endpoint.

     This is intended to supplement ifOperStatus.  Note that there
     is a 1:1 relationship between the status bits defined in this
     object and the notification thresholds defined elsewhere in
     this MIB module."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"

  ::= { hdsl2ShdslEndpointCurrEntry 3 }

hdsl2ShdslEndpointES OBJECT-TYPE

  SYNTAX      Counter32
  UNITS       "seconds"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Count of Errored Seconds (ES) on this endpoint since the xU
     was last restarted."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 4 }

hdsl2ShdslEndpointSES OBJECT-TYPE

  SYNTAX       Counter32
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Severely Errored Seconds (SES) on this endpoint
     since the xU was last restarted."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 5 }

hdsl2ShdslEndpointCRCanomalies OBJECT-TYPE

  SYNTAX       Counter32
  UNITS        "detected CRC Anomalies"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of CRC anomalies on this endpoint since the xU was
     last restarted."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 6 }

hdsl2ShdslEndpointLOSWS OBJECT-TYPE

  SYNTAX       Counter32
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Loss of Sync Word (LOSW) Seconds on this endpoint
     since the xU was last restarted."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 7 }

hdsl2ShdslEndpointUAS OBJECT-TYPE

  SYNTAX       Counter32

  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Unavailable Seconds (UAS) on this endpoint since
     the xU was last restarted."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 8 }

hdsl2ShdslEndpointCurr15MinTimeElapsed OBJECT-TYPE

  SYNTAX       Hdsl2ShdslPerfTimeElapsed
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Total elapsed seconds in the current 15-minute interval."
  ::= { hdsl2ShdslEndpointCurrEntry 9 }

hdsl2ShdslEndpointCurr15MinES OBJECT-TYPE

  SYNTAX       PerfCurrentCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Errored Seconds (ES) in the current 15-minute
     interval."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 10 }

hdsl2ShdslEndpointCurr15MinSES OBJECT-TYPE

  SYNTAX       PerfCurrentCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Severely Errored Seconds (SES) in the current
     15-minute interval."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 11 }

hdsl2ShdslEndpointCurr15MinCRCanomalies OBJECT-TYPE

  SYNTAX       PerfCurrentCount
  UNITS        "detected CRC Anomalies"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of CRC anomalies in the current 15-minute interval."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"

  ::= { hdsl2ShdslEndpointCurrEntry 12 }

hdsl2ShdslEndpointCurr15MinLOSWS OBJECT-TYPE

  SYNTAX       PerfCurrentCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Loss of Sync Word (LOSW) Seconds in the current
     15-minute interval."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 13 }

hdsl2ShdslEndpointCurr15MinUAS OBJECT-TYPE

  SYNTAX       PerfCurrentCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Unavailable Seconds (UAS) in the current 15-minute
     interval."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 14 }

hdsl2ShdslEndpointCurr1DayTimeElapsed OBJECT-TYPE

  SYNTAX       Hdsl2ShdslPerfTimeElapsed
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Number of seconds that have elapsed since the beginning of
     the current 1-day interval."
  ::= { hdsl2ShdslEndpointCurrEntry 15 }

hdsl2ShdslEndpointCurr1DayES OBJECT-TYPE

  SYNTAX       Hdsl2ShdslPerfCurrDayCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Errored Seconds (ES) during the current day as
     measured by hdsl2ShdslEndpointCurr1DayTimeElapsed."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 16 }

hdsl2ShdslEndpointCurr1DaySES OBJECT-TYPE

  SYNTAX       Hdsl2ShdslPerfCurrDayCount
  UNITS        "seconds"

  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Severely Errored Seconds (SES) during the current
     day as measured by hdsl2ShdslEndpointCurr1DayTimeElapsed."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 17 }

hdsl2ShdslEndpointCurr1DayCRCanomalies OBJECT-TYPE

  SYNTAX       Hdsl2ShdslPerfCurrDayCount
  UNITS        "detected CRC Anomalies"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of CRC anomalies during the current day as measured
     by hdsl2ShdslEndpointCurr1DayTimeElapsed."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 18 }

hdsl2ShdslEndpointCurr1DayLOSWS OBJECT-TYPE

  SYNTAX       Hdsl2ShdslPerfCurrDayCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Loss of Sync Word (LOSW) Seconds during the current
     day as measured by hdsl2ShdslEndpointCurr1DayTimeElapsed."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 19 }

hdsl2ShdslEndpointCurr1DayUAS OBJECT-TYPE

  SYNTAX       Hdsl2ShdslPerfCurrDayCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Unavailable Seconds (UAS) during the current day as
     measured by hdsl2ShdslEndpointCurr1DayTimeElapsed."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2ShdslEndpointCurrEntry 20 }

hdsl2ShdslEndpointCurrTipRingReversal OBJECT-TYPE

  SYNTAX      INTEGER
              {
              normal(1),
              reversed(2)
              }
  MAX-ACCESS  read-only

  STATUS      current
  DESCRIPTION
    "This object indicates the state of the tip/ring for the
     wire pair."
  ::= { hdsl2ShdslEndpointCurrEntry 21 }

hdsl2ShdslEndpointCurrActivationState OBJECT-TYPE

  SYNTAX      INTEGER
              {
              preActivation(1),  -- PreTrain
              activation(2),     -- Training
              data(3)            -- Trained
              }
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "This object indicates the activation or training state of
     the wire pair."
  REFERENCE   "ITU-T G.991.2, Section 6.2 PMD Activation Sequence"
  ::= { hdsl2ShdslEndpointCurrEntry 22 }

-- Segment Endpoint 15-Minute Interval Status/Performance Group --

hdsl2Shdsl15MinIntervalTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF Hdsl2Shdsl15MinIntervalEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "This table provides one row for each HDSL2/SHDSL endpoint
     performance data collection interval.  This table contains
     live data from equipment.  As such, it is NOT persistent."
  ::= { hdsl2ShdslMibObjects 6 }

hdsl2Shdsl15MinIntervalEntry OBJECT-TYPE

  SYNTAX      Hdsl2Shdsl15MinIntervalEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "An entry in the hdsl2Shdsl15MinIntervalTable."
  INDEX { ifIndex, hdsl2ShdslInvIndex, hdsl2ShdslEndpointSide,
          hdsl2ShdslEndpointWirePair, hdsl2Shdsl15MinIntervalNumber}
  ::= { hdsl2Shdsl15MinIntervalTable 1 }

Hdsl2Shdsl15MinIntervalEntry ::=

  SEQUENCE
  {
  hdsl2Shdsl15MinIntervalNumber         Unsigned32,

  hdsl2Shdsl15MinIntervalES             PerfIntervalCount,
  hdsl2Shdsl15MinIntervalSES            PerfIntervalCount,
  hdsl2Shdsl15MinIntervalCRCanomalies   PerfIntervalCount,
  hdsl2Shdsl15MinIntervalLOSWS          PerfIntervalCount,
  hdsl2Shdsl15MinIntervalUAS            PerfIntervalCount
  }

hdsl2Shdsl15MinIntervalNumber OBJECT-TYPE

  SYNTAX      Unsigned32(1..96)
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "Performance Data Interval number.  Interval 1 is the most
     recent previous interval; interval 96 is 24 hours ago.
     Intervals 2..96 are optional."
  ::= { hdsl2Shdsl15MinIntervalEntry 1 }

hdsl2Shdsl15MinIntervalES OBJECT-TYPE

  SYNTAX      PerfIntervalCount
  UNITS       "seconds"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Count of Errored Seconds (ES) during the interval."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2Shdsl15MinIntervalEntry 2 }

hdsl2Shdsl15MinIntervalSES OBJECT-TYPE

  SYNTAX      PerfIntervalCount
  UNITS       "seconds"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Count of Severely Errored Seconds (SES) during the interval."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2Shdsl15MinIntervalEntry 3 }

hdsl2Shdsl15MinIntervalCRCanomalies OBJECT-TYPE

  SYNTAX      PerfIntervalCount
  UNITS       "detected CRC Anomalies"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Count of CRC anomalies during the interval."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2Shdsl15MinIntervalEntry 4 }

hdsl2Shdsl15MinIntervalLOSWS OBJECT-TYPE

  SYNTAX      PerfIntervalCount
  UNITS       "seconds"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Count of Loss of Sync Word (LOSW) Seconds during the
     interval."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2Shdsl15MinIntervalEntry 5 }

hdsl2Shdsl15MinIntervalUAS OBJECT-TYPE

  SYNTAX      PerfIntervalCount
  UNITS       "seconds"
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "Count of Unavailable Seconds (UAS) during the interval."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2Shdsl15MinIntervalEntry 6 }

-- Segment Endpoint 1-Day Interval Status/Performance Group --

hdsl2Shdsl1DayIntervalTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF Hdsl2Shdsl1DayIntervalEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "This table provides one row for each HDSL2/SHDSL endpoint
     performance data collection interval.  This table contains
     live data from equipment.  As such, it is NOT persistent."
  ::= { hdsl2ShdslMibObjects 7 }

hdsl2Shdsl1DayIntervalEntry OBJECT-TYPE

  SYNTAX      Hdsl2Shdsl1DayIntervalEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "An entry in the hdsl2Shdsl1DayIntervalTable."
  INDEX { ifIndex, hdsl2ShdslInvIndex, hdsl2ShdslEndpointSide,
          hdsl2ShdslEndpointWirePair, hdsl2Shdsl1DayIntervalNumber }
  ::= { hdsl2Shdsl1DayIntervalTable 1 }

Hdsl2Shdsl1DayIntervalEntry ::=

  SEQUENCE
  {
  hdsl2Shdsl1DayIntervalNumber         Unsigned32,
  hdsl2Shdsl1DayIntervalMoniSecs       Hdsl2ShdslPerfTimeElapsed,

  hdsl2Shdsl1DayIntervalES             Hdsl2Shdsl1DayIntervalCount,
  hdsl2Shdsl1DayIntervalSES            Hdsl2Shdsl1DayIntervalCount,
  hdsl2Shdsl1DayIntervalCRCanomalies   Hdsl2Shdsl1DayIntervalCount,
  hdsl2Shdsl1DayIntervalLOSWS          Hdsl2Shdsl1DayIntervalCount,
  hdsl2Shdsl1DayIntervalUAS            Hdsl2Shdsl1DayIntervalCount
  }

hdsl2Shdsl1DayIntervalNumber OBJECT-TYPE

  SYNTAX      Unsigned32(1..30)
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "History Data Interval number.  Interval 1 is the most
     recent previous day; interval 30 is 30 days ago.  Intervals
     2..30 are optional."
  ::= { hdsl2Shdsl1DayIntervalEntry 1 }

hdsl2Shdsl1DayIntervalMoniSecs OBJECT-TYPE

  SYNTAX       Hdsl2ShdslPerfTimeElapsed
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "The amount of time in the 1-day interval over which the
     performance monitoring information is actually counted.
     This value will be the same as the interval duration except
     in a situation where performance monitoring data could not
     be collected for any reason."
  ::= { hdsl2Shdsl1DayIntervalEntry 2 }

hdsl2Shdsl1DayIntervalES OBJECT-TYPE

  SYNTAX       Hdsl2Shdsl1DayIntervalCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Errored Seconds (ES) during the 1-day interval as
     measured by hdsl2Shdsl1DayIntervalMoniSecs."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2Shdsl1DayIntervalEntry 3 }

hdsl2Shdsl1DayIntervalSES OBJECT-TYPE

  SYNTAX       Hdsl2Shdsl1DayIntervalCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Severely Errored Seconds (SES) during the 1-day

     interval as measured by hdsl2Shdsl1DayIntervalMoniSecs."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2Shdsl1DayIntervalEntry 4 }

hdsl2Shdsl1DayIntervalCRCanomalies OBJECT-TYPE

  SYNTAX       Hdsl2Shdsl1DayIntervalCount
  UNITS        "detected CRC Anomalies"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of CRC anomalies during the 1-day interval as
     measured by hdsl2Shdsl1DayIntervalMoniSecs."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2Shdsl1DayIntervalEntry 5 }

hdsl2Shdsl1DayIntervalLOSWS OBJECT-TYPE

  SYNTAX       Hdsl2Shdsl1DayIntervalCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Loss of Sync Word (LOSW) Seconds during the 1-day
     interval as measured by hdsl2Shdsl1DayIntervalMoniSecs."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2Shdsl1DayIntervalEntry 6 }

hdsl2Shdsl1DayIntervalUAS OBJECT-TYPE

  SYNTAX       Hdsl2Shdsl1DayIntervalCount
  UNITS        "seconds"
  MAX-ACCESS   read-only
  STATUS       current
  DESCRIPTION
    "Count of Unavailable Seconds (UAS) during the 1-day interval
     as measured by hdsl2Shdsl1DayIntervalMoniSecs."
  REFERENCE   "HDSL2 Section 7.5.3.7; SHDSL Section 9.5.5.7"
  ::= { hdsl2Shdsl1DayIntervalEntry 7 }

-- Maintenance Group --

hdsl2ShdslEndpointMaintTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF Hdsl2ShdslEndpointMaintEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "This table supports maintenance operations (e.g., loopbacks)
     to be performed on HDSL2/SHDSL segment endpoints.  This table
     contains live data from equipment.  As such, it is NOT

     persistent."
  ::= { hdsl2ShdslMibObjects 8 }

hdsl2ShdslEndpointMaintEntry OBJECT-TYPE

  SYNTAX      Hdsl2ShdslEndpointMaintEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "An entry in the hdsl2ShdslEndpointMaintTable.  Each entry
     corresponds to a single segment endpoint and is indexed by the
     ifIndex of the HDSL2/SHDSL line, the UnitId of the associated
     unit, and the side of the unit."
  INDEX { ifIndex, hdsl2ShdslInvIndex, hdsl2ShdslEndpointSide }
  ::= { hdsl2ShdslEndpointMaintTable 1 }

Hdsl2ShdslEndpointMaintEntry ::=

  SEQUENCE
  {
  hdsl2ShdslMaintLoopbackConfig      INTEGER,
  hdsl2ShdslMaintTipRingReversal     INTEGER,
  hdsl2ShdslMaintPowerBackOff        INTEGER,
  hdsl2ShdslMaintSoftRestart         INTEGER
  }

hdsl2ShdslMaintLoopbackConfig OBJECT-TYPE

  SYNTAX      INTEGER
              {
              noLoopback(1),
              normalLoopback(2),
              specialLoopback(3)
              }
  MAX-ACCESS  read-write
  STATUS      current
  DESCRIPTION
    "This object controls configuration of loopbacks for the
     associated segment endpoint.  The status of the loopback
     is obtained via the hdsl2ShdslEndpointCurrStatus object."
  ::= { hdsl2ShdslEndpointMaintEntry 1 }

hdsl2ShdslMaintTipRingReversal OBJECT-TYPE

  SYNTAX      INTEGER
              {
              normal(1),
              reversed(2)
              }
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION

    "This object indicates the state of the tip/ring pair at the
     associated segment endpoint."
  ::= { hdsl2ShdslEndpointMaintEntry 2 }

hdsl2ShdslMaintPowerBackOff OBJECT-TYPE

  SYNTAX      INTEGER
              {
              default(1),
              enhanced(2)
              }
  MAX-ACCESS  read-write
  STATUS      current
  DESCRIPTION
    "This object configures the receiver at the associated
     segment endpoint to operate in default or enhanced power
     backoff mode."
  ::= { hdsl2ShdslEndpointMaintEntry 3 }

hdsl2ShdslMaintSoftRestart OBJECT-TYPE

  SYNTAX      INTEGER
              {
              ready(1),
              restart(2)
              }
  MAX-ACCESS  read-write
  STATUS      current
  DESCRIPTION
    "This object enables the manager to trigger a soft restart
     of the modem at the associated segment endpoint.  The
     manager may only set this object to the 'restart(2)'
     value, which initiates a restart.  The agent will perform a
     restart after approximately 5 seconds.  Following the 5 second
     period, the agent will restore the object to the 'ready(1)'
     state."
  ::= { hdsl2ShdslEndpointMaintEntry 4 }

hdsl2ShdslUnitMaintTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF Hdsl2ShdslUnitMaintEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "This table supports maintenance operations for units in a
     HDSL2/SHDSL line.  Entries in this table MUST be maintained
     in a persistent manner."
  ::= { hdsl2ShdslMibObjects 9 }

hdsl2ShdslUnitMaintEntry OBJECT-TYPE

  SYNTAX      Hdsl2ShdslUnitMaintEntry

  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "An entry in the hdsl2ShdslUnitMaintTable.  Each entry
     corresponds to a single unit and is indexed by the
     ifIndex of the HDSL2/SHDSL line and the UnitId of the
     associated unit."
  INDEX { ifIndex, hdsl2ShdslInvIndex  }
  ::= { hdsl2ShdslUnitMaintTable 1 }

Hdsl2ShdslUnitMaintEntry ::=

  SEQUENCE
  {
  hdsl2ShdslMaintLoopbackTimeout     Integer32,
  hdsl2ShdslMaintUnitPowerSource     INTEGER
  }

hdsl2ShdslMaintLoopbackTimeout OBJECT-TYPE

  SYNTAX      Integer32(0..4095)
  UNITS       "minutes"
  MAX-ACCESS  read-write
  STATUS      current
  DESCRIPTION
    "This object configures the timeout value for loopbacks
     initiated at segments endpoints contained in the associated
     unit.  A value of 0 disables the timeout."
  ::= { hdsl2ShdslUnitMaintEntry 1 }

hdsl2ShdslMaintUnitPowerSource OBJECT-TYPE

  SYNTAX      INTEGER
              {
              local(1),
              span(2)
              }
  MAX-ACCESS  read-only
  STATUS      current
  DESCRIPTION
    "This object indicates the DC power source being used by the
     associated unit."
  ::= { hdsl2ShdslUnitMaintEntry 2 }

-- Span Configuration Profile Group --

hdsl2ShdslSpanConfProfileTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF Hdsl2ShdslSpanConfProfileEntry
  MAX-ACCESS  not-accessible
  STATUS      current

  DESCRIPTION
    "This table supports definitions of span configuration
     profiles for SHDSL lines.  HDSL2 does not support these
     configuration options.  This table MUST be maintained
     in a persistent manner."
  ::= { hdsl2ShdslMibObjects 10 }

hdsl2ShdslSpanConfProfileEntry OBJECT-TYPE

  SYNTAX      Hdsl2ShdslSpanConfProfileEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "Each entry corresponds to a single span configuration
     profile.  Each profile contains a set of span configuration
     parameters.  The configuration parameters in a profile are
     applied to those lines referencing that profile (see the
     hdsl2ShdslSpanConfProfile object).  Profiles may be
     created/deleted using the row creation/deletion mechanism
     via hdsl2ShdslSpanConfProfileRowStatus.  If an active
     entry is referenced in hdsl2ShdslSpanConfProfile, the
     entry MUST remain active until all references are removed."
  INDEX { IMPLIED hdsl2ShdslSpanConfProfileName }
  ::= { hdsl2ShdslSpanConfProfileTable 1 }

Hdsl2ShdslSpanConfProfileEntry ::=

  SEQUENCE
  {
  hdsl2ShdslSpanConfProfileName               SnmpAdminString,
  hdsl2ShdslSpanConfWireInterface             INTEGER,
  hdsl2ShdslSpanConfMinLineRate               Unsigned32,
  hdsl2ShdslSpanConfMaxLineRate               Unsigned32,
  hdsl2ShdslSpanConfPSD                       INTEGER,
  hdsl2ShdslSpanConfTransmissionMode
                          Hdsl2ShdslTransmissionModeType,
  hdsl2ShdslSpanConfRemoteEnabled             INTEGER,
  hdsl2ShdslSpanConfPowerFeeding              INTEGER,
  hdsl2ShdslSpanConfCurrCondTargetMarginDown  Integer32,
  hdsl2ShdslSpanConfWorstCaseTargetMarginDown Integer32,
  hdsl2ShdslSpanConfCurrCondTargetMarginUp    Integer32,
  hdsl2ShdslSpanConfWorstCaseTargetMarginUp   Integer32,
  hdsl2ShdslSpanConfUsedTargetMargins         BITS,
  hdsl2ShdslSpanConfReferenceClock
                            Hdsl2ShdslClockReferenceType,
  hdsl2ShdslSpanConfLineProbeEnable           INTEGER,
  hdsl2ShdslSpanConfProfileRowStatus          RowStatus
  }

hdsl2ShdslSpanConfProfileName OBJECT-TYPE

  SYNTAX      SnmpAdminString (SIZE(1..32))
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "This object is the unique index associated with this profile.
     Entries in this table are referenced via the object
     hdsl2ShdslSpanConfProfile in Hdsl2ShdslSpanConfEntry."
  ::= { hdsl2ShdslSpanConfProfileEntry 1 }

hdsl2ShdslSpanConfWireInterface OBJECT-TYPE

  SYNTAX      INTEGER
              {
              twoWire(1),
              fourWire(2),
              sixWire(3),
              eightWire(4)
              }
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object configures the two-wire or optional four-wire,
     six-wire, or eight-wire operation for SHDSL lines."
  DEFVAL      { twoWire }
  ::= { hdsl2ShdslSpanConfProfileEntry 2 }

hdsl2ShdslSpanConfMinLineRate OBJECT-TYPE

  SYNTAX      Unsigned32(0..4294967295)
  UNITS       "bps"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object configures the minimum transmission rate for
     the associated SHDSL Line in bits-per-second (bps) and includes
     both payload (user data) and any applicable framing overhead.
     If the minimum line rate equals the maximum line rate
     (hdsl2ShdslSpanMaxLineRate), the line rate is considered
     'fixed'.  If the minimum line rate is less than the
     maximum line rate, the line rate is considered
     'rate-adaptive'."
  DEFVAL      { 1552000 }
  ::= { hdsl2ShdslSpanConfProfileEntry 3 }

hdsl2ShdslSpanConfMaxLineRate OBJECT-TYPE

  SYNTAX      Unsigned32(0..4294967295)
  UNITS       "bps"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION

    "This object configures the maximum transmission rate for
     the associated SHDSL Line in bits-per-second (bps) and includes
     both payload (user data) and any applicable framing overhead.
     If the minimum line rate equals the maximum line rate
     (hdsl2ShdslSpanMaxLineRate), the line rate is considered
     'fixed'.  If the minimum line rate is less than the
     maximum line rate, the line rate is considered
     'rate-adaptive'."
  DEFVAL      { 1552000 }
  ::= { hdsl2ShdslSpanConfProfileEntry 4 }

hdsl2ShdslSpanConfPSD OBJECT-TYPE

  SYNTAX      INTEGER
              {
              symmetric(1),
              asymmetric(2)
              }
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object configures use of symmetric/asymmetric PSD (Power
     Spectral Density) Mask for the associated SHDSL Line.  Support
     for symmetric PSD is mandatory for all supported data rates.
     Support for asymmetric PSD is optional."
  DEFVAL      { symmetric }
  ::= { hdsl2ShdslSpanConfProfileEntry 5 }

hdsl2ShdslSpanConfTransmissionMode OBJECT-TYPE

  SYNTAX      Hdsl2ShdslTransmissionModeType
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object specifies the regional setting for the SHDSL
     line."
  DEFVAL      { { region1 } }
  ::= { hdsl2ShdslSpanConfProfileEntry 6 }

hdsl2ShdslSpanConfRemoteEnabled OBJECT-TYPE

  SYNTAX      INTEGER
              {
              enabled(1),
              disabled(2)
              }
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object enables/disables support for remote management
     of the units in an SHDSL line from the STU-R via the EOC."

  DEFVAL      { enabled }
  ::= { hdsl2ShdslSpanConfProfileEntry 7 }

hdsl2ShdslSpanConfPowerFeeding OBJECT-TYPE

  SYNTAX      INTEGER
              {
              noPower(1),
              powerFeed(2),
              wettingCurrent(3)
              }
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object enables/disables support for optional power
     feeding in an SHDSL line."
  DEFVAL      { noPower }
  ::= { hdsl2ShdslSpanConfProfileEntry 8 }

hdsl2ShdslSpanConfCurrCondTargetMarginDown OBJECT-TYPE

  SYNTAX      Integer32(-10..21)
  UNITS       "dB"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object specifies the downstream current condition target
     SNR margin for an SHDSL line.  The SNR margin is the difference
     between the desired SNR and the actual SNR.  Target SNR margin
     is the desired SNR margin for a unit."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslSpanConfProfileEntry 9 }

hdsl2ShdslSpanConfWorstCaseTargetMarginDown OBJECT-TYPE

  SYNTAX      Integer32(-10..21)
  UNITS       "dB"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object specifies the downstream worst-case target SNR
     margin for an SHDSL line.  The SNR margin is the difference
     between the desired SNR and the actual SNR.  Target SNR
     margin is the desired SNR margin for a unit."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslSpanConfProfileEntry 10 }

hdsl2ShdslSpanConfCurrCondTargetMarginUp OBJECT-TYPE

  SYNTAX      Integer32(-10..21)
  UNITS       "dB"
  MAX-ACCESS  read-create

  STATUS      current
  DESCRIPTION
    "This object specifies the upstream current-condition target
     SNR margin for an SHDSL line.  The SNR margin is the difference
     between the desired SNR and the actual SNR.  Target SNR margin
     is the desired SNR margin for a unit."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslSpanConfProfileEntry 11 }

hdsl2ShdslSpanConfWorstCaseTargetMarginUp OBJECT-TYPE

  SYNTAX      Integer32(-10..21)
  UNITS       "dB"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object specifies the upstream worst-case target SNR
     margin for an SHDSL line.  The SNR margin is the difference
     between the desired SNR and the actual SNR.  Target SNR margin
     is the desired SNR margin for a unit."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslSpanConfProfileEntry 12 }

hdsl2ShdslSpanConfUsedTargetMargins OBJECT-TYPE

  SYNTAX      BITS
              {
              currCondDown(0),
              worstCaseDown(1),
              currCondUp(2),
              worstCaseUp(3)
              }
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "Indicates whether a target SNR margin is enabled or
     disabled.  This is a bit-map of possible settings.  The
     various bit positions are as follows:

     currCondDown   - current-condition downstream target SNR
                      margin enabled

     worstCaseDown  - worst-case downstream target SNR margin
                      enabled

     currCondUp     - current-condition upstream target SNR
                      margin enabled

     worstCaseUp    - worst-case upstream target SNR margin
                      enabled."

  DEFVAL      { { currCondDown } }
  ::= { hdsl2ShdslSpanConfProfileEntry 13 }

hdsl2ShdslSpanConfReferenceClock OBJECT-TYPE

  SYNTAX      Hdsl2ShdslClockReferenceType
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object configures the clock reference for the STU-C
     in an SHDSL Line."
  DEFVAL      { localClk }
  ::= { hdsl2ShdslSpanConfProfileEntry 14 }

hdsl2ShdslSpanConfLineProbeEnable OBJECT-TYPE

  SYNTAX      INTEGER
              {
              disable(1),
              enable(2)
              }
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object enables/disables support for Line Probe of
     the units in an SHDSL line.  When Line Probe is enabled, the
     system performs Line Probing to find the best possible
     rate.  If Line Probe is disabled, the rate adaptation phase
     is skipped to shorten set up time."
  DEFVAL      { disable }
  ::= { hdsl2ShdslSpanConfProfileEntry 15 }

hdsl2ShdslSpanConfProfileRowStatus OBJECT-TYPE

  SYNTAX      RowStatus
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object controls creation/deletion of the associated
     entry in this table per the semantics of RowStatus.  If an
     active entry is referenced in hdsl2ShdslSpanConfProfile, the
     entry MUST remain active until all references are removed."
  ::= { hdsl2ShdslSpanConfProfileEntry 16 }

-- Segment Endpoint Alarm Configuration Profile group --

hdsl2ShdslEndpointAlarmConfProfileTable OBJECT-TYPE

  SYNTAX      SEQUENCE OF Hdsl2ShdslEndpointAlarmConfProfileEntry
  MAX-ACCESS  not-accessible
  STATUS      current

  DESCRIPTION
    "This table supports definitions of alarm configuration
     profiles for HDSL2/SHDSL segment endpoints.  This table
     MUST be maintained in a persistent manner."
  ::= { hdsl2ShdslMibObjects 11 }

hdsl2ShdslEndpointAlarmConfProfileEntry OBJECT-TYPE

  SYNTAX      Hdsl2ShdslEndpointAlarmConfProfileEntry
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "Each entry corresponds to a single alarm configuration profile.
     Each profile contains a set of parameters for setting alarm
     thresholds for various performance attributes monitored at
     HDSL2/SHDSL segment endpoints.  Profiles may be created/deleted
     using the row creation/deletion mechanism via
     hdsl2ShdslEndpointAlarmConfProfileRowStatus.  If an active
     entry is referenced in either hdsl2ShdslSpanConfAlarmProfile
     or hdsl2ShdslEndpointAlarmConfProfile, the entry MUST remain
     active until all references are removed."
  INDEX { IMPLIED hdsl2ShdslEndpointAlarmConfProfileName }
  ::= { hdsl2ShdslEndpointAlarmConfProfileTable 1 }

Hdsl2ShdslEndpointAlarmConfProfileEntry ::=

  SEQUENCE
  {
  hdsl2ShdslEndpointAlarmConfProfileName       SnmpAdminString,
  hdsl2ShdslEndpointThreshLoopAttenuation      Integer32,
  hdsl2ShdslEndpointThreshSNRMargin            Integer32,
  hdsl2ShdslEndpointThreshES
                               Hdsl2ShdslPerfIntervalThreshold,
  hdsl2ShdslEndpointThreshSES
                               Hdsl2ShdslPerfIntervalThreshold,
  hdsl2ShdslEndpointThreshCRCanomalies         Integer32,
  hdsl2ShdslEndpointThreshLOSWS
                               Hdsl2ShdslPerfIntervalThreshold,
  hdsl2ShdslEndpointThreshUAS
                               Hdsl2ShdslPerfIntervalThreshold,
  hdsl2ShdslEndpointAlarmConfProfileRowStatus  RowStatus
  }

hdsl2ShdslEndpointAlarmConfProfileName OBJECT-TYPE

  SYNTAX      SnmpAdminString (SIZE(1..32))
  MAX-ACCESS  not-accessible
  STATUS      current
  DESCRIPTION
    "This object is the unique index associated with this profile."
  ::= { hdsl2ShdslEndpointAlarmConfProfileEntry 1 }

hdsl2ShdslEndpointThreshLoopAttenuation OBJECT-TYPE

  SYNTAX      Integer32(-127..128)
  UNITS       "dB"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object configures the loop attenuation alarm threshold.
     When the current value of hdsl2ShdslEndpointCurrAtn reaches
     or exceeds this threshold, an hdsl2ShdslLoopAttenCrossing
     MAY be generated."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslEndpointAlarmConfProfileEntry 2 }

hdsl2ShdslEndpointThreshSNRMargin OBJECT-TYPE

  SYNTAX      Integer32(-127..128)
  UNITS       "dB"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object configures the SNR margin alarm threshold.
     When the current value of hdsl2ShdslEndpointCurrSnrMgn
     reaches or drops below this threshold, a
     hdsl2ShdslSNRMarginCrossing MAY be generated."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslEndpointAlarmConfProfileEntry 3 }

hdsl2ShdslEndpointThreshES OBJECT-TYPE

  SYNTAX      Hdsl2ShdslPerfIntervalThreshold
  UNITS       "seconds"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object configures the threshold for the number of
     Errored Seconds (ES) within any given 15-minute performance
     data collection interval.  If the value of Errored Seconds
     in a particular 15-minute collection interval reaches/
     exceeds this value, an hdsl2ShdslPerfESThresh MAY be
     generated.  At most, one notification will be sent per
     interval per endpoint."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslEndpointAlarmConfProfileEntry 4 }

hdsl2ShdslEndpointThreshSES OBJECT-TYPE

  SYNTAX      Hdsl2ShdslPerfIntervalThreshold
  UNITS       "seconds"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION

    "This object configures the threshold for the number of
     Severely Errored Seconds (SES) within any given 15-minute
     performance data collection interval.  If the value of
     Severely Errored Seconds in a particular 15-minute collection
     interval reaches/exceeds this value, an hdsl2ShdslPerfSESThresh
     MAY be generated.  At most, one notification will be sent per
     interval per endpoint."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslEndpointAlarmConfProfileEntry 5 }

hdsl2ShdslEndpointThreshCRCanomalies OBJECT-TYPE

  SYNTAX      Integer32
  UNITS       "detected CRC Anomalies"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object configures the threshold for the number of
     CRC anomalies within any given 15-minute performance data
     collection interval.  If the value of CRC anomalies in a
     particular 15-minute collection interval reaches/exceeds
     this value, an hdsl2ShdslPerfCRCanomaliesThresh MAY be
     generated.  At most, one notification will be sent per
     interval per endpoint."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslEndpointAlarmConfProfileEntry 6 }

hdsl2ShdslEndpointThreshLOSWS OBJECT-TYPE

  SYNTAX      Hdsl2ShdslPerfIntervalThreshold
  UNITS       "seconds"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object configures the threshold for the number of
     Loss of Sync Word (LOSW) Seconds within any given 15-minute
     performance data collection interval.  If the value of LOSW
     in a particular 15-minute collection interval reaches/exceeds
     this value, an hdsl2ShdslPerfLOSWSThresh MAY be generated.
     At most, one notification will be sent per interval per
     endpoint."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslEndpointAlarmConfProfileEntry 7 }

hdsl2ShdslEndpointThreshUAS OBJECT-TYPE

  SYNTAX      Hdsl2ShdslPerfIntervalThreshold
  UNITS       "seconds"
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION

    "This object configures the threshold for the number of
     Unavailable Seconds (UAS) within any given 15-minute
     performance data collection interval.  If the value of UAS
     in a particular 15-minute collection interval reaches/exceeds
     this value, an hdsl2ShdslPerfUASThresh MAY be generated.
     At most, one notification will be sent per interval per
     endpoint."
  DEFVAL      { 0 }
  ::= { hdsl2ShdslEndpointAlarmConfProfileEntry 8 }

hdsl2ShdslEndpointAlarmConfProfileRowStatus OBJECT-TYPE

  SYNTAX      RowStatus
  MAX-ACCESS  read-create
  STATUS      current
  DESCRIPTION
    "This object controls creation/deletion of the associated
     entry in this table as per the semantics of RowStatus.
     If an active entry is referenced in either
     hdsl2ShdslSpanConfAlarmProfile or
     hdsl2ShdslEndpointAlarmConfProfile, the entry MUST remain
     active until all references are removed."
  ::= { hdsl2ShdslEndpointAlarmConfProfileEntry 9 }

-- Notifications Group --

hdsl2ShdslNotifications OBJECT IDENTIFIER ::= { hdsl2ShdslMIB 0 }

hdsl2ShdslLoopAttenCrossing NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurrAtn,
  hdsl2ShdslEndpointThreshLoopAttenuation
  }
  STATUS     current
  DESCRIPTION
    "This notification indicates that the loop attenuation
     threshold (as per the hdsl2ShdslEndpointThreshLoopAttenuation
     value) has been reached/exceeded for the HDSL2/SHDSL segment
     endpoint."
  ::= { hdsl2ShdslNotifications 1 }

hdsl2ShdslSNRMarginCrossing NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurrSnrMgn,
  hdsl2ShdslEndpointThreshSNRMargin
  }

  STATUS     current
  DESCRIPTION
    "This notification indicates that the SNR margin threshold (as
     per the hdsl2ShdslEndpointThreshSNRMargin value) has been
     reached/exceeded for the HDSL2/SHDSL segment endpoint."
  ::= { hdsl2ShdslNotifications 2 }

hdsl2ShdslPerfESThresh NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurr15MinES,
  hdsl2ShdslEndpointThreshES
  }
  STATUS     current
  DESCRIPTION
    "This notification indicates that the errored seconds
     threshold (as per the hdsl2ShdslEndpointThreshES value)
     has been reached/exceeded for the HDSL2/SHDSL segment
     endpoint."
  ::= { hdsl2ShdslNotifications 3 }

hdsl2ShdslPerfSESThresh NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurr15MinSES,
  hdsl2ShdslEndpointThreshSES
  }
  STATUS     current
  DESCRIPTION
    "This notification indicates that the severely errored seconds
     threshold (as per the hdsl2ShdslEndpointThreshSES value) has
     been reached/exceeded for the HDSL2/SHDSL segment endpoint."
  ::= { hdsl2ShdslNotifications 4 }

hdsl2ShdslPerfCRCanomaliesThresh NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurr15MinCRCanomalies,
  hdsl2ShdslEndpointThreshCRCanomalies
  }
  STATUS    current
  DESCRIPTION
    "This notification indicates that the CRC anomalies threshold
     (as per the hdsl2ShdslEndpointThreshCRCanomalies value) has
     been reached/exceeded for the HDSL2/SHDSL segment endpoint."
  ::= { hdsl2ShdslNotifications 5 }

hdsl2ShdslPerfLOSWSThresh NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurr15MinLOSWS,
  hdsl2ShdslEndpointThreshLOSWS
  }
  STATUS     current
  DESCRIPTION
    "This notification indicates that the LOSW Seconds threshold
     (as per the hdsl2ShdslEndpointThreshLOSWS value) has been
     reached/exceeded for the HDSL2/SHDSL segment endpoint."
  ::= { hdsl2ShdslNotifications 6 }

hdsl2ShdslPerfUASThresh NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurr15MinUAS,
  hdsl2ShdslEndpointThreshUAS
  }
  STATUS     current
  DESCRIPTION
    "This notification indicates that the unavailable seconds
     threshold (as per the hdsl2ShdslEndpointThreshUAS value) has
     been reached/exceeded for the HDSL2/SHDSL segment endpoint."
  ::= { hdsl2ShdslNotifications 7 }

hdsl2ShdslSpanInvalidNumRepeaters NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslSpanConfNumRepeaters
  }
  STATUS     current
  DESCRIPTION
    "This notification indicates that a mismatch has been detected
     between the number of repeater/regenerator units configured
     for an HDSL2/SHDSL line via the hdsl2ShdslSpanConfNumRepeaters
     object and the actual number of repeater/regenerator units
     discovered via the EOC."
  ::= { hdsl2ShdslNotifications 8 }

hdsl2ShdslLoopbackFailure NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslMaintLoopbackConfig
  }
  STATUS     current
  DESCRIPTION
    "This notification indicates that an endpoint maintenance
     loopback command failed for an HDSL2/SHDSL segment."

  ::= { hdsl2ShdslNotifications 9 }

hdsl2ShdslpowerBackoff NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurrStatus
  }
  STATUS    current
  DESCRIPTION
    "This notification indicates that the bit setting for
     powerBackoff in the hdsl2ShdslEndpointCurrStatus object for
     this endpoint has changed."
  ::= { hdsl2ShdslNotifications 10 }

hdsl2ShdsldeviceFault NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurrStatus
  }
  STATUS    current
  DESCRIPTION
    "This notification indicates that the bit setting for
     deviceFault in the hdsl2ShdslEndpointCurrStatus object for
     this endpoint has changed."
  ::= { hdsl2ShdslNotifications 11 }

hdsl2ShdsldcContinuityFault NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurrStatus
  }
  STATUS    current
  DESCRIPTION
    "This notification indicates that the bit setting for
     dcContinuityFault in the hdsl2ShdslEndpointCurrStatus object
     for this endpoint has changed."
  ::= { hdsl2ShdslNotifications 12 }

hdsl2ShdslconfigInitFailure NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurrStatus
  }
  STATUS    current
  DESCRIPTION
    "This notification indicates that the bit setting for
     configInitFailure in the hdsl2ShdslEndpointCurrStatus object
     for this endpoint has changed."

  ::= { hdsl2ShdslNotifications 13 }

hdsl2ShdslprotocolInitFailure NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurrStatus
  }
  STATUS    current
  DESCRIPTION
    "This notification indicates that the bit setting for
     protocolInitFailure in the hdsl2ShdslEndpointCurrStatus
     object for this endpoint has changed."
  ::= { hdsl2ShdslNotifications 14 }

hdsl2ShdslnoNeighborPresent NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslEndpointCurrStatus
  }
  STATUS    current
  DESCRIPTION
    "This notification indicates that the bit setting for
     noNeighborPresent in the hdsl2ShdslEndpointCurrStatus object
     for this endpoint has changed."
  ::= { hdsl2ShdslNotifications 15 }

hdsl2ShdslLocalPowerLoss NOTIFICATION-TYPE

  OBJECTS
  {
  hdsl2ShdslInvVendorID
  }
  STATUS    current
  DESCRIPTION
    "This notification indicates impending unit failure due to
     loss of local power (last gasp)."
  ::= { hdsl2ShdslNotifications 16 }

-- conformance information --

hdsl2ShdslConformance OBJECT IDENTIFIER ::= { hdsl2ShdslMIB 3 } hdsl2ShdslGroups OBJECT IDENTIFIER ::=

            { hdsl2ShdslConformance 1 }

hdsl2ShdslCompliances OBJECT IDENTIFIER ::=

            { hdsl2ShdslConformance 2 }

-- agent compliance statements

hdsl2ShdslLineMibCompliance MODULE-COMPLIANCE

  STATUS  deprecated
  DESCRIPTION
    "The compliance statement for SNMP entities that implement
    HDSL2 and SHDSL.  The version of SHDSL supported in this
    compliance statement is g.shdsl.

    **** This compliance statement is deprecated. ****"
  MODULE
  MANDATORY-GROUPS
  {
  hdsl2ShdslSpanConfGroup,
  hdsl2ShdslSpanStatusGroup,
  hdsl2ShdslInventoryGroup,
  hdsl2ShdslEndpointConfGroup,
  hdsl2ShdslEndpointCurrGroup,
  hdsl2Shdsl15MinIntervalGroup,
  hdsl2Shdsl1DayIntervalGroup,
  hdsl2ShdslMaintenanceGroup,
  hdsl2ShdslEndpointAlarmConfGroup,
  hdsl2ShdslNotificationGroup
  }

GROUP hdsl2ShdslInventoryShdslGroup

  DESCRIPTION
    "Support for this group is only required for implementations
    supporting SHDSL lines."

GROUP hdsl2ShdslSpanShdslStatusGroup

  DESCRIPTION
    "Support for this group is only required for implementations
    supporting SHDSL lines."

GROUP hdsl2ShdslSpanConfProfileGroup

  DESCRIPTION
    "Support for this group is only required for implementations
    supporting SHDSL lines."

OBJECT hdsl2ShdslSpanConfWireInterface

  SYNTAX      INTEGER
              {
              twoWire(1),
              fourWire(2)
              }
  DESCRIPTION
    "An implementation only has to support the range as
    applicable for the original g.shdsl specification defined
    in RFC 3276."

OBJECT hdsl2ShdslStatusMaxAttainableLineRate

  SYNTAX      Unsigned32(0..4112000)
  DESCRIPTION
    "An implementation only has to support the range as
    applicable for the original g.shdsl specification defined
    in RFC 3276."

OBJECT hdsl2ShdslStatusActualLineRate

  SYNTAX      Unsigned32(0..4112000)
  DESCRIPTION
    "An implementation only has to support the range as
    applicable for the original g.shdsl specification defined
    in RFC 3276."

OBJECT hdsl2ShdslSpanConfMinLineRate

  SYNTAX      Unsigned32(0..4112000)
  DESCRIPTION
    "An implementation only has to support the range as
    applicable for the original g.shdsl specification defined
    in RFC 3276."

OBJECT hdsl2ShdslSpanConfMaxLineRate

  SYNTAX      Unsigned32(0..4112000)
  DESCRIPTION
    "An implementation only has to support the range as
    applicable for the original g.shdsl specification defined
    in RFC 3276."

  ::= { hdsl2ShdslCompliances 1 }

hdsl2GshdslbisLineMibCompliance MODULE-COMPLIANCE

  STATUS  current
  DESCRIPTION
    "The compliance statement for SNMP entities that implement
    HDSL2 and SHDSL.  The version of SHDSL supported in this
    compliance statement is g.shdsl.bis."
  MODULE
  MANDATORY-GROUPS
  {
  hdsl2ShdslSpanConfGroup,
  hdsl2ShdslSpanStatusGroup,
  hdsl2ShdslInventoryGroup,
  hdsl2ShdslEndpointConfGroup,
  hdsl2ShdslEndpointCurrGroup,
  hdsl2Shdsl15MinIntervalGroup,
  hdsl2Shdsl1DayIntervalGroup,
  hdsl2ShdslMaintenanceGroup,
  hdsl2ShdslEndpointAlarmConfGroup,

  hdsl2ShdslNotificationGroup
  }

GROUP hdsl2ShdslInventoryShdslGroup

  DESCRIPTION
    "Support for this group is only required for implementations
    supporting SHDSL lines."

GROUP hdsl2ShdslSpanShdslStatusGroup

  DESCRIPTION
    "Support for this group is only required for implementations
    supporting SHDSL lines."

GROUP hdsl2ShdslSpanConfProfileGroup

  DESCRIPTION
    "Support for this group is only required for implementations
    supporting SHDSL lines."

GROUP hdsl2ShdslWirePairGroup

  DESCRIPTION
    "Support for this group is only required for implementations
    supporting SHDSL lines."

GROUP hdsl2ShdslPayloadRateGroup

  DESCRIPTION
    "Support for this group is only required for implementations
    supporting SHDSL lines."

  ::= { hdsl2ShdslCompliances 2 }

-- units of conformance --

hdsl2ShdslSpanConfGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2ShdslSpanConfNumRepeaters,
  hdsl2ShdslSpanConfProfile,
  hdsl2ShdslSpanConfAlarmProfile
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects for configuring span-related
     parameters for HDSL2/SHDSL lines."
  ::= { hdsl2ShdslGroups 1 }

hdsl2ShdslSpanStatusGroup OBJECT-GROUP

  OBJECTS

  {
  hdsl2ShdslStatusNumAvailRepeaters
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects for retrieving span-related
     status for HDSL2/SHDSL lines."
  ::= { hdsl2ShdslGroups 2 }

hdsl2ShdslInventoryShdslGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2ShdslInvTransmissionModeCapability
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects for retrieving SHDSL-specific
     inventory information."
  ::= { hdsl2ShdslGroups 3 }

hdsl2ShdslSpanShdslStatusGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2ShdslStatusMaxAttainableLineRate,
  hdsl2ShdslStatusActualLineRate,
  hdsl2ShdslStatusTransmissionModeCurrent
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects for retrieving SHDSL-specific
     span-related status."
  ::= { hdsl2ShdslGroups 4 }

hdsl2ShdslInventoryGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2ShdslInvVendorID,
  hdsl2ShdslInvVendorModelNumber,
  hdsl2ShdslInvVendorSerialNumber,
  hdsl2ShdslInvVendorEOCSoftwareVersion,
  hdsl2ShdslInvStandardVersion,
  hdsl2ShdslInvVendorListNumber,
  hdsl2ShdslInvVendorIssueNumber,
  hdsl2ShdslInvVendorSoftwareVersion,
  hdsl2ShdslInvEquipmentCode,
  hdsl2ShdslInvVendorOther
  }
  STATUS      current

  DESCRIPTION
    "This group supports objects that provide unit inventory
     information about the units in HDSL2/SHDSL lines."
  ::= { hdsl2ShdslGroups 5 }

hdsl2ShdslEndpointConfGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2ShdslEndpointCurrAtn
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects for configuring parameters for
     segment endpoints in HDSL2/SHDSL lines."
  ::= { hdsl2ShdslGroups 6 }

hdsl2ShdslEndpointCurrGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2ShdslEndpointCurrAtn,
  hdsl2ShdslEndpointCurrSnrMgn,
  hdsl2ShdslEndpointCurrStatus,
  hdsl2ShdslEndpointES,
  hdsl2ShdslEndpointSES,
  hdsl2ShdslEndpointCRCanomalies,
  hdsl2ShdslEndpointLOSWS,
  hdsl2ShdslEndpointUAS,
  hdsl2ShdslEndpointCurr15MinTimeElapsed,
  hdsl2ShdslEndpointCurr15MinES,
  hdsl2ShdslEndpointCurr15MinSES,
  hdsl2ShdslEndpointCurr15MinCRCanomalies,
  hdsl2ShdslEndpointCurr15MinLOSWS,
  hdsl2ShdslEndpointCurr15MinUAS,
  hdsl2ShdslEndpointCurr1DayTimeElapsed,
  hdsl2ShdslEndpointCurr1DayES,
  hdsl2ShdslEndpointCurr1DaySES,
  hdsl2ShdslEndpointCurr1DayCRCanomalies,
  hdsl2ShdslEndpointCurr1DayLOSWS,
  hdsl2ShdslEndpointCurr1DayUAS
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects that provide current status and
     performance measurements relating to segment endpoints in
     HDSL2/SHDSL lines."
  ::= { hdsl2ShdslGroups 7 }

hdsl2Shdsl15MinIntervalGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2Shdsl15MinIntervalES,
  hdsl2Shdsl15MinIntervalSES,
  hdsl2Shdsl15MinIntervalCRCanomalies,
  hdsl2Shdsl15MinIntervalLOSWS,
  hdsl2Shdsl15MinIntervalUAS
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects that maintain historic
     performance measurements relating to segment endpoints in
     HDSL2/SHDSL lines in 15-minute intervals."
  ::= { hdsl2ShdslGroups 8 }

hdsl2Shdsl1DayIntervalGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2Shdsl1DayIntervalMoniSecs,
  hdsl2Shdsl1DayIntervalES,
  hdsl2Shdsl1DayIntervalSES,
  hdsl2Shdsl1DayIntervalCRCanomalies,
  hdsl2Shdsl1DayIntervalLOSWS,
  hdsl2Shdsl1DayIntervalUAS
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects that maintain historic
     performance measurements relating to segment endpoints in
     HDSL2/SHDSL lines in 1-day intervals."
  ::= { hdsl2ShdslGroups 9 }

hdsl2ShdslMaintenanceGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2ShdslMaintLoopbackConfig,
  hdsl2ShdslMaintTipRingReversal,
  hdsl2ShdslMaintPowerBackOff,
  hdsl2ShdslMaintSoftRestart,
  hdsl2ShdslMaintLoopbackTimeout,
  hdsl2ShdslMaintUnitPowerSource
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects that provide support for
     maintenance actions for HDSL2/SHDSL lines."
  ::= { hdsl2ShdslGroups 10 }

hdsl2ShdslEndpointAlarmConfGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2ShdslEndpointAlarmConfProfile,
  hdsl2ShdslEndpointThreshLoopAttenuation,
  hdsl2ShdslEndpointThreshSNRMargin,
  hdsl2ShdslEndpointThreshES,
  hdsl2ShdslEndpointThreshSES,
  hdsl2ShdslEndpointThreshCRCanomalies,
  hdsl2ShdslEndpointThreshLOSWS,
  hdsl2ShdslEndpointThreshUAS,
  hdsl2ShdslEndpointAlarmConfProfileRowStatus
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects that allow configuration of alarm
     thresholds for various performance parameters for HDSL2/SHDSL
     lines."
  ::= { hdsl2ShdslGroups 11 }

hdsl2ShdslNotificationGroup NOTIFICATION-GROUP

  NOTIFICATIONS
  {
  hdsl2ShdslLoopAttenCrossing,
  hdsl2ShdslSNRMarginCrossing,
  hdsl2ShdslPerfESThresh,
  hdsl2ShdslPerfSESThresh,
  hdsl2ShdslPerfCRCanomaliesThresh,
  hdsl2ShdslPerfLOSWSThresh,
  hdsl2ShdslPerfUASThresh,
  hdsl2ShdslSpanInvalidNumRepeaters,
  hdsl2ShdslLoopbackFailure,
  hdsl2ShdslpowerBackoff,
  hdsl2ShdsldeviceFault,
  hdsl2ShdsldcContinuityFault,
  hdsl2ShdslconfigInitFailure,
  hdsl2ShdslprotocolInitFailure,
  hdsl2ShdslnoNeighborPresent,
  hdsl2ShdslLocalPowerLoss
  }
  STATUS      current
  DESCRIPTION
    "This group supports notifications of significant conditions
     associated with HDSL2/SHDSL lines."
  ::= { hdsl2ShdslGroups 12 }

hdsl2ShdslSpanConfProfileGroup OBJECT-GROUP

  OBJECTS

  {
  hdsl2ShdslSpanConfWireInterface,
  hdsl2ShdslSpanConfMinLineRate,
  hdsl2ShdslSpanConfMaxLineRate,
  hdsl2ShdslSpanConfPSD,
  hdsl2ShdslSpanConfTransmissionMode,
  hdsl2ShdslSpanConfRemoteEnabled,
  hdsl2ShdslSpanConfPowerFeeding,
  hdsl2ShdslSpanConfCurrCondTargetMarginDown,
  hdsl2ShdslSpanConfWorstCaseTargetMarginDown,
  hdsl2ShdslSpanConfCurrCondTargetMarginUp,
  hdsl2ShdslSpanConfWorstCaseTargetMarginUp,
  hdsl2ShdslSpanConfUsedTargetMargins,
  hdsl2ShdslSpanConfReferenceClock,
  hdsl2ShdslSpanConfLineProbeEnable,
  hdsl2ShdslSpanConfProfileRowStatus
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects that constitute configuration
     profiles for configuring span-related parameters in SHDSL
     lines."
  ::= { hdsl2ShdslGroups 13 }

hdsl2ShdslWirePairGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2ShdslEndpointCurrTipRingReversal,
  hdsl2ShdslEndpointCurrActivationState
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects that provide the status
     of SHDSL-specific wire pairs."
  ::= { hdsl2ShdslGroups 14 }

hdsl2ShdslPayloadRateGroup OBJECT-GROUP

  OBJECTS
  {
  hdsl2ShdslStatusMaxAttainablePayloadRate,
  hdsl2ShdslStatusActualPayloadRate
  }
  STATUS      current
  DESCRIPTION
    "This group supports objects for retrieving payload rates
     that exclude any framing overhead."
  ::= { hdsl2ShdslGroups 15 }

END

Implementation Analysis

A management application that supports RFC 3276 could mistakenly flag a unit that responds with a rate or wire pair that exceeds the ranges and/or enumerations specified in RFC 3276. For example, a G.shdsl.bis line with four wire pairs would report statistics for wire pairs that do not exist in RFC 3276. That is, a GET-NEXT request issues with the object identifier:

  hdsl2ShdslEndpointCurrAtn.1.1.1.2

might return

  hdsl2ShdslEndpointCurrAtn.1.1.1.3 = 0

with a G.shdsl.bis unit and

  hdsl2ShdslEndpointCurrSnrMgn.1.1.1.1 = 0

with an HDSL2 unit as these objects are indexed by

  INDEX  { ifIndex, hdsl2ShdslInvIndex, hdsl2ShdslendpointSide,
           hdsl2ShdslEndpointWirePair }

A management application intended to manage G.shdsl.bis agents SHOULD be modified to accept this sequence.

One should note that this same unmodified management application is still capable of managing G.shdsl.bis agents albeit to the degree of G.SHDSL (non-bis) limitations. That is, it can create and monitor configurations limited to two wire pairs with an upper-rate limit of 4112000 bits/second.

Security Considerations

There are a number of management objects defined in this MIB module with a MAX-ACCESS clause of read-write and/or read-create. Such objects may be considered sensitive or vulnerable in some network environments. The support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations. These are the tables and objects and their sensitivity/vulnerability:

o hdsl2ShdslSpanConfTable

  The table consists of the following objects that support SET
  operations:

  *  hdsl2ShdslSpanConfNumRepeaters
  *  hdsl2ShdslSpanConfProfile
  *  hdsl2ShdslSpanConfAlarmProfile

  Unauthorized changes to hdsl2ShdslSpanConfNumRepeaters could
  result in an hdsl2ShdslSpanInvalidNumRepeaters notification.  Note
  the discussion on hdsl2ShdslSpanInvalidNumRepeaters in the
  Notifications section above.

  Unauthorized changes to hdsl2ShdslSpanConfProfile could have an
  adverse operational effect on a span.  Reference the
  hdsl2ShdslSpanConfProfileTable discussion below.

  Unauthorized changes to hdsl2ShdslSpanConfAlarmProfile could have
  a contrary effect on notifications.  Reference the
  hdsl2ShdslEndpointAlarmConfProfileTable discussion below.

o hdsl2ShdslEndpointConfTable

  This table contains one object,
  hdsl2ShdslEndpointAlarmConfProfile, that supports SET operations.
  Unauthorized changes could have an undesirable notifications.
  Reference the hdsl2ShdslEndpointAlarmConfProfileTable discussion
  below.

o hdsl2ShdslEndpointMaintTable

  The table consists of the following objects that support SET
  operations:

  *  hdsl2ShdslMaintLoopbackConfig
  *  hdsl2ShdslMaintPowerBackoff
  *  hdsl2ShdslMaintSoftRestart

  Unauthorized changes to hdsl2ShdslMaintLoopbackConfig could
  prevent end-to-end data transfer due to an activation of a
  loopback.

  Unauthorized changes to hdsl2ShdslMaintPowerBackoff could result
  in an increased in bundle interference.

  Unauthorized changes to hdsl2ShdslMaintSoftRestart could result in
  a temporary interruption of end-to-end data transfer as the result
  of the triggering of a soft restart.

o hdsl2ShdslUnitMaintTable

  This table contains one object, hdsl2ShdslMaintLoopbackTimeout,
  that supports SET operations.  An unauthorized change to this
  object could result in the timeout value for loopbacks being
  increased, decreased, or disabled.

o hdsl2ShdslSpanConfProfileTable

  The table consists of the following objects that support SET
  operations:

  *  hdsl2ShdslSpanConfWireInterface
  *  hdsl2ShdslSpanConfMinLineRate
  *  hdsl2ShdslSpanConfMaxLineRate
  *  hdsl2ShdslSpanConfPSD
  *  hdsl2ShdslSpanConfTransmissionMode
  *  hdsl2ShdslSpanConfRemoteEnabled
  *  hdsl2ShdslSpanConfPowerFeeding
  *  hdsl2ShdslSpanConfCurrCondTargetMarginDown
  *  hdsl2ShdslSpanConfWorstCaseTargetMarginDown
  *  hdsl2ShdslSpanConfCurrCondTargetMarginUp
  *  hdsl2ShdslSpanConfWorstCaseTargetMarginUp
  *  hdsl2ShdslSpanConfUsedTargetMargins
  *  hdsl2ShdslSpanConfReferenceClock
  *  hdsl2ShdslSpanConfLineProbeEnable
  *  hdsl2ShdslSpanConfProfileRowStatus

  Setting any of the objects to an incorrect value could have an
  adverse operational effect on a span.

  Unauthorized changes to the hdsl2ShdslSpanConfWireInterface could
  result in the failure of a span to achieve activation to a state
  that would permit data flow.  For example, setting this object to
  six-wire or eight-wire operation when one of the units in the span
  only supports two-wire or four-wire operation would likely prevent
  an expected end-to-end data transfer capability.

  Unauthorized changes to hdsl2ShdslSpanConfMinLineRate or
  hdsl2ShdslSpanConfMaxLineRate could have an adverse effect on
  performance.  The range of allowable line rates could be altered
  such that the span may not be able to train to a line rate that

  would permit any end-user data to traverse the span or the span
  could train to a line rate that is either greater than or less
  than the line rate that the provider has pledged.

  Unauthorized changes to hdsl2ShdslSpanConfPSD or
  hdsl2ShdslSpanConfTransmissionMode could have a detrimental effect
  on loop reach, performance, or spectral compatibility.

  Unauthorized changes to hdsl2ShdslSpanConfRemoteEnable could alter
  the remote management ability of units.

  Unauthorized changes to hdsl2ShdslSpanConfPowerFeeding could
  shutdown units that are expected to be fed power remotely.
  Changing the configuration such that wetting current is not
  supplied may result in corrosion of electrical contacts.

  Unauthorized changes to
  hdsl2ShdslSpanConfCurrCondTargetMarginDown,
  hdsl2ShdslSpanConfWorstCaseTargetMarginDown,
  hdsl2ShdslSpanConfCurrCondTargetMarginUp,
  hdsl2ShdslSpanConfWorstCaseTargetMarginUp, or
  hdsl2ShdslSpanConfUsedTargetMargins could result in invalid
  parameters used to determine if a data rate can be supported under
  current and worst-case noise.

  Unauthorized changes to hdsl2ShdslSpanConfReferenceClock could
  result in the selection of a clock source that might either
  prevent any data from being transferred or impair data transfer.
  In addition, an increase in CRC anomalies may be experienced.

  Unauthorized changes to hdsl2ShdslSpanConfLineProbeEnable could
  have a negative effect on selecting the optimum rate or power
  level based on current line conditions.

  Unauthorized changes to row status could result in unwanted
  profiles being created or brought into service.  Also, changes to
  the row status could result in profiles being inadvertently
  deleted or taken out of service.

o hdsl2ShdslEndpointAlarmConfProfileTable

  The table consists of the following objects that support SET
  operations:

  *  hdsl2ShdslEndpointThreshLoopAttenuation
  *  hdsl2ShdslEndpointThreshSNRMargin
  *  hdsl2ShdslEndpointThreshES
  *  hdsl2ShdslEndpointThreshSES

  *  hdsl2ShdslEndpointThreshCRCanomalies
  *  hdsl2ShdslEndpointThreshLOSWS
  *  hdsl2ShdslEndpointThreshUAS
  *  hdsl2ShdslEndpointAlarmConfProfileRowStatus

  Increasing any of the threshold values could result in a
  notification being suppressed or deferred.  Setting a threshold to
  0 could result in a notification being suppressed.  Suppressing or
  deferring a notification could prevent the timely delivery of
  important diagnostic information.  Decreasing any of the threshold
  values could result in a notification being sent from the network
  falsely reporting a threshold crossing.

  Changing a threshold value could also have an impact on the amount
  of notifications the agent sends.  This document adds a paragraph,
  which was not in RFC 3276 RFC3276, to the Notifications section
  that provides general guidance to the rate limiting of
  notifications.  Agent implementations not adhering to the rate-
  limiting desires could result in notifications being generated at
  an uncontrolled rate.  Unauthorized changes to a threshold value
  could result in an undesired notification rate.

  Unauthorized changes to row status could result in unwanted
  profiles being created or brought into service.  Also, changes to
  the row status could result in profiles being inadvertently
  deleted or taken out of service.

Some of the readable objects in this MIB module (i.e., objects with a MAX-ACCESS other than not-accessible) may be considered sensitive or vulnerable in some network environments. It is thus important to control even GET and/or NOTIFY access to these objects and possibly to even encrypt the values of these objects when sending them over the network via SNMP. These are the tables and objects and their sensitivity/vulnerability:

o hdsl2ShdslInventoryTable

  Access to these objects would allow an intruder to obtain
  information about which vendor's equipment is in use on the
  network.  Further, such information is considered sensitive in
  many environments for competitive reasons.

  *  hdsl2ShdslInvVendorID
  *  hdsl2ShdslInvVendorModelNumber
  *  hdsl2ShdslInvVendorSerialNumber
  *  hdsl2ShdslInvVendorEOCSoftwareVersion
  *  hdsl2ShdslInvStandardVersion
  *  hdsl2ShdslInvVendorListNumber

  *  hdsl2ShdslInvVendorIssueNumber
  *  hdsl2ShdslInvVendorSoftwareVersion
  *  hdsl2ShdslInvEquipmentCode
  *  hdsl2ShdslInvVendorOther
  *  hdsl2ShdslInvTransmissionModeCapability

SNMP versions prior to SNMPv3 did not include adequate security. Even if the network itself is secure (for example by using IPsec), even then, there is no control as to who on the secure network is allowed to access and GET/SET (read/change/create/delete) the objects in this MIB module.

It is RECOMMENDED that implementers consider the security features as provided by the SNMPv3 framework (see RFC3410, Section 8), including full support for the SNMPv3 cryptographic mechanisms (for authentication and privacy).

Further, deployment of SNMP versions prior to SNMPv3 is NOT RECOMMENDED. Instead, it is RECOMMENDED to deploy SNMPv3 and to enable cryptographic security. It is then a customer/operator responsibility to ensure that the SNMP entity giving access to an instance of this MIB module is properly configured to give access to the objects only to those principals (users) that have legitimate rights to indeed GET or SET (change/create/delete) them.

Acknowledgements

The authors are deeply grateful to the authors of the ADSL LINE MIB (RFC 2662 RFC2662), Gregory Bathrick and Faye Ly, as much of the text and structure of this document originate in their documents.

The authors are also grateful to the authors of FR MFR MIB (RFC 3020 RFC3020), Prayson Pate, Bob Lynch, and Kenneth Rehbehn, as the majority of the Security Considerations section was lifted from their document.

The authors also acknowledge the importance of the contributions and suggestions regarding interface indexing structures received from David Horton of CITR.

The authors are extremely thankful to Bert Wijnen, Randy Presuhn, and C. M. Heard for their extensive review and the many suggestions they provided.

Other contributions were received from the following:

     Matt Beanland (Extel Communications)
     Philip Bergstresser (Adtran)
     Steve Blackwell (Centillium)
     Umberto Bonollo (NEC Australia)
     John Egan (Metalink BroadBand)
     Yagal Hachmon (RAD)
     Mark Johnson (Red Point)
     Sharon Mantin (Orckit)
     Moti Morgenstern (ECI)
     Raymond Murphy (Ericsson)
     Lee Nipper (Verilink)
     Randy Presuhn (BMC Software)
     Katy Sherman (Orckit)
     Mike Sneed (ECI)
     Jon Turney (DSL Solutions)
     Aron Wahl (Memotec)
     Bert Wijnen (Lucent)
     Jim Wilson (for Mindspeed)
     Michael Wrobel (Memotec)

References

Normative References

[G.991.2] Blackwell, S., "Single-Pair High-Speed Digital Subscriber

          Line (SHDSL) Transceivers", ITU-T G.991.2, December 2003.

RFC2119 Bradner, S., "Key words for use in RFCs to Indicate

          Requirement Levels", BCP 14, RFC 2119, March 1997.

RFC2578 McCloghrie, K., Perkins, D., and J. Schoenwaelder,

          "Structure of Management Information Version 2 (SMIv2)",
          STD 58, RFC 2578, April 1999.

RFC2579 McCloghrie, K., Perkins, D., and J. Schoenwaelder,

          "Textual Conventions for SMIv2", STD 58, RFC 2579, April
          1999.

RFC2580 McCloghrie, K., Perkins, D., and J. Schoenwaelder,

          "Conformance Statements for SMIv2", STD 58, RFC 2580,
          April 1999.

RFC2863 McCloghrie, K. and F. Kastenholz, "The Interfaces Group

          MIB", RFC 2863, June 2000.

RFC3411 Harrington, D., Presuhn, R., and B. Wijnen, "An

          Architecture for Describing Simple Network Management
          Protocol (SNMP) Management Frameworks", STD 62, RFC 3411,
          December 2002.

RFC3593 Tesink, K., "Textual Conventions for MIB Modules Using

          Performance History Based on 15 Minute Intervals", RFC
          3593, September 2003.

[T1E1.4] American National Standards Institute, "ANSI T1E1.4/2000-

          006", February 2000.

Informative References

RFC2662 Bathrick, G. and F. Ly, "Definitions of Managed Objects

          for the ADSL Lines", RFC 2662, August 1999.

RFC3020 Pate, P., Lynch, B., and K. Rehbehn, "Definitions of

          Managed Objects for Monitoring and Controlling the UNI/NNI
          Multilink Frame Relay Function", RFC 3020, December 2000.

RFC3276 Ray, B. and R. Abbi, "Definitions of Managed Objects for

          High Bit-Rate DSL - 2nd generation (HDSL2) and Single-Pair
          High-Speed Digital Subscriber Line (SHDSL) Lines
          Processing", RFC 3276, May 2002.

RFC3410 Case, J., Mundy, R., Partain, D., and B. Stewart,

          "Introduction and Applicability Statements for Internet-
          Standard Management Framework", RFC 3410, December 2002.

RFC3418 Presuhn, R., "Management Information Base (MIB) for the

          Simple Network Management Protocol (SNMP)", STD 62, RFC
          3418, December 2002.

Authors' Addresses

Clay Sikes Zhone Technologies, Inc. Florida Design Center 8454 126th Ave. N. Largo, FL 33773 US

Phone: +1 727 530 8257 Fax: +1 727 532 5698 EMail: [email protected]

Bob Ray PESA Switching Systems, Inc. 330-A Wynn Drive Huntsville, AL 35805 US

Phone: +1 256 726 9200 ext. 142 Fax: +1 256 726 9271 EMail: [email protected]

Rajesh Abbi Alcatel USA 2301 Sugar Bush Road Raleigh, NC 27612 US

Phone: +1 919-850-6194 Fax: +1 919-850-6670 EMail: [email protected]

Full Copyright Statement

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