SONET-MIB DEFINITIONS ::= BEGIN

IMPORTS

    MODULE-IDENTITY, OBJECT-TYPE,

    Integer32, transmission

          FROM SNMPv2-SMI

    DisplayString, TruthValue

          FROM SNMPv2-TC

    MODULE-COMPLIANCE, OBJECT-GROUP

          FROM SNMPv2-CONF

    ifIndex

          FROM IF-MIB

    PerfCurrentCount, PerfIntervalCount

          FROM PerfHist-TC-MIB;

--  This is the MIB module for the SONET/SDH Interface objects.

sonetMIB MODULE-IDENTITY

    LAST-UPDATED "200308110000Z"

    ORGANIZATION "IETF AToM MIB Working Group"

    CONTACT-INFO

      "WG charter:

         http://www.ietf.org/html.charters/atommib-charter.html

       Mailing Lists:

         General Discussion: atommib@research.telcordia.com

         To Subscribe: atommib-request@research.telcordia.com

       Kaj Tesink

       Telcordia Technologies

       Tel: (732) 758-5254

       Fax: (732) 758-2269

       E-mail: kaj@research.telcordia.com."

    DESCRIPTION

      "The MIB module to describe SONET/SDH interface objects.

       Copyright (C) The Internet Society (2003).  This version

       of this MIB module is part of RFC 3592;  see the RFC

       itself for full legal notices."

    REVISION      "200308110000Z"

    DESCRIPTION

        "The key changes made to this MIB module

        since its publication in RFC 2558

        are as follows.

        (1) Corrected typographical error

            (bellcore1991(2) in sonetSESthresholdSet)

        (2) Added support for sts192cSTM64(6) and

            sts768cSTM256(7) in sonetPathCurrentWidth

        (3) Corrected description of the applicability

            of VTs for SDH for improved accuracy

        (4) Added clarification in the SES description that

            CV counts should be frozen during SESs

        (5) Corrected typographical errors:

            - Line Alarm Indication Signal description of the

              Terminology section (20.5 --> 2.5 seconds)

            - In the Terminology section

              sonetSESThresholdSet  --> sonetSESthresholdSet

            "

    REVISION      "199810190000Z"

    DESCRIPTION

        "The RFC 2558 version of this MIB module.

        The key changes made to this MIB module

        since its initial publication in RFC 1595

        are as follows.

        (1) The MODULE-IDENTITY has been updated to reflect the

            changes to the MIB.

        (2) Where applicable, the textual conventions

            PerfCurrentCount and PerfIntervalCount from

            PerfHist-TC-MIB have been used in place of Gauge32.

        (3) An agent now has the option to delay updates to

            the various performance counts in lieu of performing

            retroactive adjustments upon entering into or exiting

            from unavailable time. This implementation option is

            described in Appendix A of this memo.

        (4) In order to make the SONET-MIB more useful for

            circuit provisioning, the formerly read-only objects

            sonetMediumType, sonetMediumLineCoding,

            sonetMediumLineType, and sonetMediumCircuitIdentifier

            have been given a MAX-ACCESS of read-write. The

            MIN-ACCESS remains read-only.

        (5) The DESCRIPTION clause for sonetMediumTimeElapsed has

            been updated to describe its behaviour if the duration

            of the current interval exceeds the maximum value.

        (6) The DESCRIPTION clause for sonetMediumValidIntervals

            has been updated to describe its behaviour when some

            intervals may be unavailable, and the object

            sonetMediumInvalidIntervals has been added to keep

            count of the number of missing intervals (if any).

        (7) The object sonetMediumLoopbackConfig has been added

            to enable or disable loopback configurations.

        (8) Because the error count thresholds for declaring

            severely errored seconds that are specified in ANSI

            T1.231-1993, ITU-T G.826-1995, and ANSI T1.231-1997

            are all different from each other and from the thresholds

            specified in RFC 1595, an enumerated INTEGER object

            sonetSESthresholdSet has been added to allow an agent

            to specify which threshold set is in use. Text has

            been added to Section 3 stating that if this object is

            not implemented the thresholds specified in RFC 1595

            should be assumed, and the table containing those

            thresholds has been moved to Appendix B of this memo.

        (9) A column with SYNTAX TruthValue has been added to each

            interval table.  The purpose of the additional column

            is to indicate, for each interval, whether the data

            is valid in the sense intended by ANSI T1.231 clause

            9.1.2.2 [T1.231a][T1.231b]. The objects in question are:

                sonetSectionIntervalValidData

                sonetLineIntervalValidData

                sonetFarEndLineIntervalValidData

                sonetPathIntervalValidData

                sonetFarEndPathIntervalValidData

                sonetVTIntervalValidData

                sonetFarEndVTIntervalValidData

       (10) The ranges for sonetPathCurrentStatus and

            sonetVTCurrentStatus have been made consistent

            with the DESCRIPTION clauses.

       (11) The conformance information has been updated. Previous

            conformance information from RFC 1595 has been

            deprecated. Some typographical errors in the deprecated

            section have been corrected in order to prevent

            MIB compilation errors."

    REVISION      "199401030000Z"

    DESCRIPTION

        "The RFC 1595 version of this MIB module."

    ::= { transmission 39 }

--  This is the MIB module for the SONET/SDH objects

sonetObjects      OBJECT IDENTIFIER ::= { sonetMIB 1 }

sonetObjectsPath  OBJECT IDENTIFIER ::= { sonetMIB 2 }

sonetObjectsVT    OBJECT IDENTIFIER ::= { sonetMIB 3 }

-- groups in the SONET/SDH MIB module

sonetMedium        OBJECT IDENTIFIER ::= { sonetObjects 1 }

sonetSection       OBJECT IDENTIFIER ::= { sonetObjects 2 }

sonetLine          OBJECT IDENTIFIER ::= { sonetObjects 3 }

sonetFarEndLine    OBJECT IDENTIFIER ::= { sonetObjects 4 }

sonetPath          OBJECT IDENTIFIER ::= { sonetObjectsPath 1 }

sonetFarEndPath    OBJECT IDENTIFIER ::= { sonetObjectsPath 2 }

sonetVT            OBJECT IDENTIFIER ::= { sonetObjectsVT 1 }

sonetFarEndVT      OBJECT IDENTIFIER ::= { sonetObjectsVT 2 }

-- the SONET/SDH Medium group

-- SONET/SDH interfaces for some applications may be electrical

-- interfaces and not optical interfaces.  This group handles

-- the configuration information for both optical SONET/SDH

-- interfaces and electrical SONET/SDH interfaces.

sonetMediumTable OBJECT-TYPE

    SYNTAX  SEQUENCE OF SonetMediumEntry

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

       "The SONET/SDH Medium table."

     ::= { sonetMedium 1 }

sonetMediumEntry OBJECT-TYPE

    SYNTAX  SonetMediumEntry

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

       "An entry in the SONET/SDH Medium table."

    INDEX   { ifIndex }

     ::= { sonetMediumTable 1 }

SonetMediumEntry ::=

    SEQUENCE {

         sonetMediumType               INTEGER,

         sonetMediumTimeElapsed        Integer32,

         sonetMediumValidIntervals     Integer32,

         sonetMediumLineCoding         INTEGER,

         sonetMediumLineType           INTEGER,

         sonetMediumCircuitIdentifier  DisplayString,

         sonetMediumInvalidIntervals   Integer32,

         sonetMediumLoopbackConfig     BITS

    }

sonetMediumType OBJECT-TYPE

    SYNTAX  INTEGER  {

               sonet(1),

               sdh(2)

            }

    MAX-ACCESS  read-write

    STATUS  current

    DESCRIPTION

       "This variable identifies whether a SONET

       or a SDH signal is used across this interface."

    ::= { sonetMediumEntry 1 }

sonetMediumTimeElapsed OBJECT-TYPE

    SYNTAX  Integer32 (1..900)

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The number of seconds, including partial 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, the

       current interval exceeds the maximum value, the

       agent will return the maximum value."

    ::= { sonetMediumEntry 2 }

sonetMediumValidIntervals OBJECT-TYPE

    SYNTAX  Integer32 (0..96)

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The number of previous 15-minute intervals

       for which data was collected.

       A SONET/SDH interface must be capable

       of supporting at least n intervals.

       The minimum value of n is 4.

       The default of n is 32.

       The maximum value of n is 96.

       The value will be <n> unless the measurement was

       (re-)started within the last (<n>*15) minutes, in which

       case the value will be the number of complete 15

       minute intervals for which the agent has at least

       some data. In certain cases (e.g., in the case

       where the agent is a proxy) it is possible that some

       intervals are unavailable.  In this case, this

       interval is the maximum interval number for

       which data is available. "

    ::= { sonetMediumEntry 3 }

sonetMediumLineCoding OBJECT-TYPE

    SYNTAX  INTEGER {

                sonetMediumOther(1),

                sonetMediumB3ZS(2),

                sonetMediumCMI(3),

                sonetMediumNRZ(4),

                sonetMediumRZ(5)

            }

    MAX-ACCESS  read-write

    STATUS  current

    DESCRIPTION

       "This variable describes the line coding for

       this interface. The B3ZS and CMI are used for

       electrical SONET/SDH signals (STS-1 and STS-3).

       The Non-Return to Zero (NRZ) and the Return

       to Zero are used for optical SONET/SDH signals."

    ::= { sonetMediumEntry 4 }

sonetMediumLineType OBJECT-TYPE

    SYNTAX  INTEGER {

                sonetOther(1),

                sonetShortSingleMode(2),

                sonetLongSingleMode(3),

                sonetMultiMode(4),

                sonetCoax(5),

                sonetUTP(6)

            }

    MAX-ACCESS  read-write

    STATUS  current

    DESCRIPTION

       "This variable describes the line type for

       this interface. The line types are

       Short and Long Range

       Single Mode fiber or Multi-Mode fiber interfaces,

       and coax and UTP for electrical interfaces.  The

       value sonetOther should be used when the Line Type is

       not one of the listed values."

    ::= { sonetMediumEntry 5 }

sonetMediumCircuitIdentifier OBJECT-TYPE

    SYNTAX  DisplayString (SIZE (0..255))

    MAX-ACCESS  read-write

    STATUS  current

    DESCRIPTION

       "This variable contains the transmission

       vendor's circuit identifier, for the

       purpose of facilitating troubleshooting.

       Note that the circuit identifier, if available,

       is also represented by ifPhysAddress."

    ::= { sonetMediumEntry 6 }

sonetMediumInvalidIntervals OBJECT-TYPE

    SYNTAX  Integer32 (0..96)

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

        "The number of intervals in the range from

        0 to sonetMediumValidIntervals for which no

        data is available. This object will typically

        be zero except in cases where the data for some

        intervals are not available (e.g., in proxy

        situations)."

    ::= { sonetMediumEntry 7 }

sonetMediumLoopbackConfig OBJECT-TYPE

    SYNTAX      BITS {

                  sonetNoLoop(0),

                  sonetFacilityLoop(1),

                  sonetTerminalLoop(2),

                  sonetOtherLoop(3) }

    MAX-ACCESS  read-write

    STATUS      current

    DESCRIPTION

       "The current loopback state of the SONET/SDH interface.  The

        values mean:

          sonetNoLoop

             Not in the loopback state. A device that is not

             capable of performing a loopback on this interface

             shall always return this value.

          sonetFacilityLoop

             The received signal at this interface is looped back

             out through the corresponding transmitter in the return

             direction.

          sonetTerminalLoop

             The signal that is about to be transmitted is connected

             to the associated incoming receiver.

          sonetOtherLoop

             Loopbacks that are not defined here."

    ::= { sonetMediumEntry 8 }

sonetSESthresholdSet    OBJECT-TYPE

    SYNTAX   INTEGER {

               other(1),

               bellcore1991(2),

               ansi1993(3),

               itu1995(4),

               ansi1997(5)

                      }

    MAX-ACCESS      read-write

    STATUS          current

    DESCRIPTION

      "An enumerated integer indicating which

       recognized set of SES thresholds that

       the agent uses for determining severely

       errored seconds and unavailable time.

       other(1)

         None of the following.

       bellcore1991(2)

         Bellcore TR-NWT-000253, 1991 [TR253], or

         ANSI T1M1.3/93-005R2, 1993 [T1M1.3].

         See also Appendix B.

       ansi1993(3)

         ANSI T1.231, 1993 [T1.231a], or

         Bellcore GR-253-CORE, Issue 2, 1995 [GR253]

       itu1995(4)

         ITU Recommendation G.826, 1995 [G.826]

       ansi1997(5)

         ANSI T1.231, 1997 [T1.231b]

       If a manager changes the value of this

       object then the SES statistics collected

       prior to this change must be invalidated."

     ::= { sonetMedium 2 }

-- the SONET/SDH Section group

-- this group consists of 2 tables:

-- - the SONET/SDH Section Current Table

-- - the SONET/SDH Section Interval Table

-- the SONET/SDH Section Current Table

-- The SONET/SDH Section

-- current table contains various statistics

-- being collected for the current 15 minute interval.

sonetSectionCurrentTable OBJECT-TYPE

    SYNTAX  SEQUENCE OF SonetSectionCurrentEntry

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

       "The SONET/SDH Section Current table."

     ::= { sonetSection 1 }

sonetSectionCurrentEntry OBJECT-TYPE

    SYNTAX  SonetSectionCurrentEntry

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

       "An entry in the SONET/SDH Section Current table."

    INDEX   { ifIndex }

     ::= { sonetSectionCurrentTable 1 }

SonetSectionCurrentEntry ::=

    SEQUENCE {

        sonetSectionCurrentStatus   Integer32,

        sonetSectionCurrentESs      PerfCurrentCount,

        sonetSectionCurrentSESs     PerfCurrentCount,

        sonetSectionCurrentSEFSs    PerfCurrentCount,

        sonetSectionCurrentCVs      PerfCurrentCount

    }

sonetSectionCurrentStatus OBJECT-TYPE

    SYNTAX  Integer32 (1..6)

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "This variable indicates the

       status of the interface.

       The sonetSectionCurrentStatus

       is a bit map represented

       as a sum, therefore,

       it can represent multiple defects

       simultaneously.

       The sonetSectionNoDefect should be

       set if and only if

       no other flag is set.

       The various bit positions are:

             1   sonetSectionNoDefect

             2   sonetSectionLOS

             4   sonetSectionLOF"

     ::= { sonetSectionCurrentEntry 1 }

sonetSectionCurrentESs OBJECT-TYPE

    SYNTAX  PerfCurrentCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The counter associated with the number of Errored

       Seconds encountered by a SONET/SDH

       Section in the current 15 minute interval."

     ::= { sonetSectionCurrentEntry 2 }

sonetSectionCurrentSESs OBJECT-TYPE

    SYNTAX  PerfCurrentCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The counter associated with the number of

       Severely Errored Seconds

       encountered by a SONET/SDH Section in the current 15

       minute interval."

     ::= { sonetSectionCurrentEntry 3 }

sonetSectionCurrentSEFSs OBJECT-TYPE

    SYNTAX  PerfCurrentCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The counter associated with the number of

       Severely Errored Framing Seconds

       encountered by a SONET/SDH Section in the current

       15 minute interval."

    ::= { sonetSectionCurrentEntry 4 }

sonetSectionCurrentCVs OBJECT-TYPE

    SYNTAX  PerfCurrentCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The counter associated with the number of Coding

       Violations encountered by a

       SONET/SDH Section in the current 15 minute interval."

     ::= { sonetSectionCurrentEntry 5 }

-- the SONET/SDH Section Interval Table

-- The SONET/SDH Section Interval Table

-- contains various statistics

-- collected by each system over a maximum

-- of the previous 24 hours of

-- operation.  The past 24 hours may be broken into 96

-- completed 15 minute intervals.

-- A system is required to store at

-- least 4 completed 15 minute interval.

-- The default value is 32 intervals.

sonetSectionIntervalTable OBJECT-TYPE

    SYNTAX  SEQUENCE OF SonetSectionIntervalEntry

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

       "The SONET/SDH Section Interval table."

     ::= { sonetSection 2 }

sonetSectionIntervalEntry OBJECT-TYPE

    SYNTAX  SonetSectionIntervalEntry

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

       "An entry in the SONET/SDH Section Interval table."

    INDEX   { ifIndex,

              sonetSectionIntervalNumber }

     ::= { sonetSectionIntervalTable 1 }

SonetSectionIntervalEntry ::=

    SEQUENCE {

         sonetSectionIntervalNumber  Integer32,

         sonetSectionIntervalESs     PerfIntervalCount,

         sonetSectionIntervalSESs    PerfIntervalCount,

         sonetSectionIntervalSEFSs   PerfIntervalCount,

         sonetSectionIntervalCVs     PerfIntervalCount,

         sonetSectionIntervalValidData  TruthValue

    }

sonetSectionIntervalNumber OBJECT-TYPE

    SYNTAX  Integer32 (1..96)

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

      "A number between 1 and 96, which identifies the

      interval for which the set of statistics is available.

      The interval identified by 1 is the most recently

      completed 15 minute interval,

      and the interval identified

      by N is the interval immediately preceding the

      one identified

      by N-1."

     ::= { sonetSectionIntervalEntry 1 }

sonetSectionIntervalESs OBJECT-TYPE

    SYNTAX  PerfIntervalCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The counter associated with the number of

       Errored Seconds encountered

       by a SONET/SDH Section in a

       particular 15-minute interval

       in the past 24 hours."

     ::= { sonetSectionIntervalEntry 2 }

sonetSectionIntervalSESs OBJECT-TYPE

    SYNTAX  PerfIntervalCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The counter associated with the number of

       Severely Errored Seconds

       encountered by a SONET/SDH Section in a

       particular 15-minute interval

       in the past 24 hours."

    ::= { sonetSectionIntervalEntry 3 }

sonetSectionIntervalSEFSs OBJECT-TYPE

    SYNTAX  PerfIntervalCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The counter associated with the number of

       Severely Errored Framing Seconds

       encountered by a SONET/SDH Section in a

       particular 15-minute interval

       in the past 24 hours."

    ::= { sonetSectionIntervalEntry 4 }

sonetSectionIntervalCVs OBJECT-TYPE

    SYNTAX  PerfIntervalCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The counter associated with the number of Coding

       Violations encountered by a

       SONET/SDH Section in a particular 15-minute interval

       in the past 24 hours."

    ::= { sonetSectionIntervalEntry 5 }

sonetSectionIntervalValidData OBJECT-TYPE

    SYNTAX  TruthValue

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "This variable indicates if the data for this

        interval is valid."

    ::= { sonetSectionIntervalEntry 6 }

-- the SONET/SDH Line group

-- this group consists of 2 tables:

-- - the SONET/SDH Line Current Table

-- - the SONET/SDH Line Interval Table

-- the SONET/SDH Line Current Table

-- The SONET/SDH Line

-- current table contains various statistics

-- being collected for the current 15 minute interval.

sonetLineCurrentTable OBJECT-TYPE

    SYNTAX  SEQUENCE OF SonetLineCurrentEntry

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

      "The SONET/SDH Line Current table."

    ::= { sonetLine 1 }

sonetLineCurrentEntry OBJECT-TYPE

    SYNTAX  SonetLineCurrentEntry

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

      "An entry in the SONET/SDH Line Current table."

    INDEX   { ifIndex }

    ::= { sonetLineCurrentTable 1 }

SonetLineCurrentEntry ::=

    SEQUENCE {

         sonetLineCurrentStatus    Integer32,

         sonetLineCurrentESs       PerfCurrentCount,

         sonetLineCurrentSESs      PerfCurrentCount,

         sonetLineCurrentCVs       PerfCurrentCount,

         sonetLineCurrentUASs      PerfCurrentCount

     }

sonetLineCurrentStatus OBJECT-TYPE

    SYNTAX  Integer32 (1..6)

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "This variable indicates the

       status of the interface.

       The sonetLineCurrentStatus

       is a bit map represented

       as a sum, therefore,

       it can represent multiple defects

       simultaneously.

       The sonetLineNoDefect should be

       set if and only if

       no other flag is set.

       The various bit positions are:

        1   sonetLineNoDefect

        2   sonetLineAIS

        4   sonetLineRDI"

     ::= { sonetLineCurrentEntry 1 }

sonetLineCurrentESs OBJECT-TYPE

    SYNTAX  PerfCurrentCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

     "The counter associated with the number of Errored

     Seconds encountered by a SONET/SDH

     Line in the current 15 minute interval."

    ::= { sonetLineCurrentEntry 2 }

sonetLineCurrentSESs OBJECT-TYPE

    SYNTAX  PerfCurrentCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

     "The counter associated with the number of

     Severely Errored Seconds

     encountered by a SONET/SDH Line in the current 15

     minute

     interval."

    ::= { sonetLineCurrentEntry 3 }

sonetLineCurrentCVs OBJECT-TYPE

    SYNTAX  PerfCurrentCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

     "The counter associated with the number of Coding

     Violations encountered by a

     SONET/SDH Line in the current 15 minute interval."

    ::= { sonetLineCurrentEntry 4 }

sonetLineCurrentUASs OBJECT-TYPE

    SYNTAX  PerfCurrentCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

     "The counter associated with the number of

     Unavailable Seconds

     encountered by a SONET/SDH Line in the current 15

     minute

     interval."

    ::= { sonetLineCurrentEntry 5 }

-- the SONET/SDH Line Interval Table

-- The SONET/SDH Line Interval Table

-- contains various statistics

-- collected by each system over a maximum

-- of the previous 24 hours of

-- operation.  The past 24 hours may be broken into 96

-- completed 15 minute intervals.

-- A system is required to store at

-- least 4 completed 15 minute interval.

-- The default value is 32 intervals.

sonetLineIntervalTable OBJECT-TYPE

    SYNTAX  SEQUENCE OF SonetLineIntervalEntry

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

       "The SONET/SDH Line Interval table."

     ::= { sonetLine 2 }

sonetLineIntervalEntry OBJECT-TYPE

    SYNTAX  SonetLineIntervalEntry

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

       "An entry in the SONET/SDH Line Interval table."

   INDEX   { ifIndex,

             sonetLineIntervalNumber }

   ::= { sonetLineIntervalTable 1 }

SonetLineIntervalEntry ::=

    SEQUENCE {

        sonetLineIntervalNumber    Integer32,

        sonetLineIntervalESs       PerfIntervalCount,

        sonetLineIntervalSESs      PerfIntervalCount,

        sonetLineIntervalCVs       PerfIntervalCount,

        sonetLineIntervalUASs      PerfIntervalCount,

        sonetLineIntervalValidData TruthValue

    }

sonetLineIntervalNumber OBJECT-TYPE

    SYNTAX  Integer32 (1..96)

    MAX-ACCESS  not-accessible

    STATUS  current

    DESCRIPTION

        "A number between 1 and 96, which identifies the

        interval for which the set of statistics is available.

        The interval identified by 1 is the most recently

        completed 15 minute interval,

        and the interval identified

        by N is the interval immediately preceding the

        one identified

        by N-1."

     ::= { sonetLineIntervalEntry 1 }

sonetLineIntervalESs OBJECT-TYPE

    SYNTAX  PerfIntervalCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The counter associated with the number of

       Errored Seconds encountered

       by a SONET/SDH Line in a

       particular 15-minute interval

       in the past 24 hours."

     ::= { sonetLineIntervalEntry 2 }

sonetLineIntervalSESs OBJECT-TYPE

    SYNTAX  PerfIntervalCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "The counter associated with the number of

       Severely Errored Seconds

       encountered by a SONET/SDH Line in a

       particular 15-minute interval

       in the past 24 hours."

      ::= { sonetLineIntervalEntry 3 }

sonetLineIntervalCVs OBJECT-TYPE

    SYNTAX  PerfIntervalCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

      "The counter associated with the number of Coding

      Violations encountered by a

      SONET/SDH Line in a

      particular 15-minute interval

      in the past 24 hours."

    ::= { sonetLineIntervalEntry 4 }

sonetLineIntervalUASs OBJECT-TYPE

    SYNTAX  PerfIntervalCount

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

      "The counter associated with the

      number of Unavailable Seconds

      encountered by a SONET/SDH Line in

      a particular 15-minute interval

      in the past 24 hours."

    ::= { sonetLineIntervalEntry 5 }

sonetLineIntervalValidData OBJECT-TYPE

    SYNTAX  TruthValue

    MAX-ACCESS  read-only

    STATUS  current

    DESCRIPTION

       "This variable indicates if the data for this

        interval is valid."

    ::= { sonetLineIntervalEntry 6 }

-- The SONET/SDH Far End Line group.

-- This group may only be implemented by SONET/SDH (LTEs)

-- systems that provide for a far end block error (FEBE)

-- information at the SONET/SDH Line Layer.

-- This group consists of two tables:

--    SONET/SDH Far End Line Current Table

--    SONET/SDH Far End Line Interval Table