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RFC 4805

 
 
 

Definitions of Managed Objects for the DS1, J1, E1, DS2, and E2 Interface Types

Part 2 of 4, p. 20 to 43
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4.  Object Definitions

   DS1-MIB DEFINITIONS ::= BEGIN

   IMPORTS
        MODULE-IDENTITY, OBJECT-TYPE,
        NOTIFICATION-TYPE, transmission
        FROM SNMPv2-SMI         -- [RFC2578]
        DisplayString, TimeStamp, TruthValue
        FROM SNMPv2-TC          -- [RFC2579]
        MODULE-COMPLIANCE, OBJECT-GROUP,
        NOTIFICATION-GROUP
        FROM SNMPv2-CONF        -- [RFC2580]
        InterfaceIndex, ifIndex
        FROM IF-MIB             -- [RFC2863]
        PerfCurrentCount, PerfIntervalCount,
        PerfTotalCount
        FROM PerfHist-TC-MIB;   -- [RFC3593]

   ds1 MODULE-IDENTITY
       LAST-UPDATED "200703050000Z"
       ORGANIZATION "IETF AToM MIB Working Group"

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       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

          Editor: Orly Nicklass

          Postal: RAD Data Communications, Ltd.
                  Ziv Tower, 24 Roul Walenberg
                  Tel Aviv, Israel, 69719

                  Tel: +9723 765 9969
          E-mail: orly_n@rad.com"

       DESCRIPTION
            "The MIB module to describe DS1, J1, E1, DS2, and
             E2 interfaces objects.

             Copyright (c) The IETF Trust (2007).  This
             version of this MIB module is part of RFC 4805;
             see the RFC itself for full legal notices."
       REVISION "200703050000Z"
       DESCRIPTION
            "The following changes were made:
             (1) Values were added to dsx1LineType to
                 support J1 types.
             (2) The object dsx1LineImpedance was added.
             (3) All DM-related objects were deprecated
                 following their removal from ITU performance
                 standards.
            The RFC 4805 version of this MIB module."
       REVISION "200409090000Z"
       DESCRIPTION
            "The RFC 3895 version of this MIB module.
             The key changes made to this MIB module
             since its publication in RFC 2495 are as follows:
        (1) The dsx1FracIfIndex SYNTAX matches the description
            range.
        (2) A value was added to dsx1TransmitClockSource.
        (3) Values were added to dsx1LineType.
        (4) Two objects were added, dsx1LineMode and
            dsx1LineBuildOut, to better express transceiver
            mode and LineBuildOut for T1.
        (5) Reference was added to Circuit Identifier object.

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        (6) Align the DESCRIPTION clauses of few statistic
            objects with the near-end definition, with the far-end
            definition, and with RFC 3593.
        (7) Changes in Compliance Statements to include new
            objects.
        (8) A typographical error in dsx2E2 was fixed; the new name
            is dsx1E2."

       REVISION "199808011830Z"
       DESCRIPTION
            "The RFC 2495 version of this MIB module.
             The key changes made to this MIB module
             since its publication in RFC 1406 are as follows:
        (1)  The Fractional table has been deprecated.
        (2)  This document uses SMIv2.
        (3)  Usage is given for ifTable and ifXTable.
        (4)  Example usage of ifStackTable is included.
        (5)  dsx1IfIndex has been deprecated.
        (6)  Support for DS2 and E2 has been added.
        (7)  Additional lineTypes for DS2, E2, and unframed E1
             were added.
        (8)  The definition of valid intervals has been clarified
             for the case where the agent proxied for other
             devices.  In particular, the treatment of missing
             intervals has been clarified.
        (9)  An inward loopback has been added.
        (10) Additional lineStatus bits have been added for Near
             End in Unavailable Signal State, Carrier Equipment
             Out of Service, DS2 Payload AIS, and DS2 Performance
             Threshold.
        (11) A read-write line Length object has been added.
        (12) Signal mode of other has been added.
        (13) Added a lineStatus last change, trap and enabler.
        (14) The e1(19) ifType has been obsoleted, so this MIB
             does not list it as a supported ifType.
        (15) Textual Conventions for statistics objects have
             been used.
        (16) A new object, dsx1LoopbackStatus, has been
             introduced to reflect the loopbacks established
             on a DS1 interface and the source to the requests.
             dsx1LoopbackConfig continues to be the desired
             loopback state while dsx1LoopbackStatus reflects
             the actual state.
        (17) A dual loopback has been added to allow the setting
             of an inward loopback and a line loopback at the
             same time.
        (18) An object indicating which channel to use within a
             parent object (i.e., DS3) has been added.

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        (19) An object has been added to indicate whether or
             not this DS1/E1 is channelized.
        (20) Line coding type of B6ZS has been added for DS2."

       REVISION "199301252028Z"
       DESCRIPTION
            "Initial version, published as RFC 1406."
       ::= { transmission 18 }

   -- note that this subsumes cept(19) and g703at2mb(67)
   -- there is no separate CEPT or G703AT2MB MIB
   -- The DS1 Near End Group

   -- The DS1 Near End Group consists of five tables:
   --    DS1 Configuration
   --    DS1 Current
   --    DS1 Interval
   --    DS1 Total
   --    DS1 Channel Table

   -- The DS1 Configuration Table

   dsx1ConfigTable OBJECT-TYPE
        SYNTAX  SEQUENCE OF Dsx1ConfigEntry
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
               "The DS1 Configuration table."
        ::= { ds1 6 }

   dsx1ConfigEntry OBJECT-TYPE
        SYNTAX  Dsx1ConfigEntry
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
               "An entry in the DS1 Configuration table."
        INDEX   { dsx1LineIndex }
        ::= { dsx1ConfigTable 1 }

   Dsx1ConfigEntry ::=
        SEQUENCE {
              dsx1LineIndex                    InterfaceIndex,
              dsx1IfIndex                      InterfaceIndex,
              dsx1TimeElapsed                  INTEGER,
              dsx1ValidIntervals               INTEGER,
              dsx1LineType                     INTEGER,
              dsx1LineCoding                   INTEGER,
              dsx1SendCode                     INTEGER,

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              dsx1CircuitIdentifier            DisplayString,
              dsx1LoopbackConfig               INTEGER,
              dsx1LineStatus                   INTEGER,
              dsx1SignalMode                   INTEGER,
              dsx1TransmitClockSource          INTEGER,
              dsx1Fdl                          INTEGER,
              dsx1InvalidIntervals             INTEGER,
              dsx1LineLength                   INTEGER,
              dsx1LineStatusLastChange         TimeStamp,
              dsx1LineStatusChangeTrapEnable   INTEGER,
              dsx1LoopbackStatus               INTEGER,
              dsx1Ds1ChannelNumber             INTEGER,
              dsx1Channelization               INTEGER,
              dsx1LineMode                     INTEGER,
              dsx1LineBuildOut                 INTEGER,
              dsx1LineImpedance                INTEGER
   }

   dsx1LineIndex OBJECT-TYPE
        SYNTAX  InterfaceIndex
        MAX-ACCESS  read-only  -- read-only since originally an
                               -- SMIv1 index
        STATUS  current
        DESCRIPTION
               "This object should be made equal to ifIndex.  The
               next paragraph describes its previous usage.
               Making the object equal to ifIndex allows proper
               use of the ifStackTable and ds0/ds0bundle MIBs.

               Previously, this object was the identifier of a DS1
               interface on a managed device.  If there is an
               ifEntry that is directly associated with this and
               only this DS1 interface, it should have the same
               value as ifIndex.  Otherwise, number the
               dsx1LineIndices with a unique identifier
               following the rules of choosing a number that is
               greater than ifNumber and numbering the inside
               interfaces (e.g., equipment side) with even
               numbers and outside interfaces (e.g., network
               side) with odd numbers."
        ::= { dsx1ConfigEntry 1 }

   dsx1IfIndex OBJECT-TYPE
        SYNTAX  InterfaceIndex
        MAX-ACCESS  read-only
        STATUS  deprecated
        DESCRIPTION
               "This value for this object is equal to the value

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               of ifIndex from the Interfaces table (RFC 2863)."
        ::= { dsx1ConfigEntry 2 }

   dsx1TimeElapsed OBJECT-TYPE
        SYNTAX  INTEGER (0..899)
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of seconds that have elapsed since the
               beginning of the near-end current error-
               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."
        ::= { dsx1ConfigEntry 3 }

   dsx1ValidIntervals OBJECT-TYPE
        SYNTAX  INTEGER (0..96)
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of previous near-end intervals for
               which data was collected.  The value will be 96
               unless the interface was brought online within the
               last 24 hours, in which case the value will be the
               number of complete 15-minute near-end intervals
               since the interface has been online.  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."
        ::= { dsx1ConfigEntry 4 }

   dsx1LineType OBJECT-TYPE
        SYNTAX INTEGER {
                  other(1),
                  dsx1ESF(2),
                  dsx1D4(3),
                  dsx1E1(4),
                  dsx1E1CRC(5),
                  dsx1E1MF(6),
                  dsx1E1CRCMF(7),
                  dsx1Unframed(8),
                  dsx1E1Unframed(9),
                  dsx1DS2M12(10),
                  dsx1E2(11),
                  dsx1E1Q50(12),
                  dsx1E1Q50CRC(13),

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                  dsx1J1ESF(14),
                  dsx1J1Unframed(16)
                                  }
        MAX-ACCESS read-write
        STATUS current
        DESCRIPTION
               "This variable indicates the variety of DS1
               Line implementing this circuit.  The type of
               circuit affects the number of bits per second
               that the circuit can reasonably carry, as well
               as the interpretation of the usage and error
               statistics.  The values, in sequence, describe:

                     TITLE:          SPECIFICATION:
                     dsx1ESF         Extended SuperFrame DS1
                                            (T1.107)
                     dsx1D4          AT&T D4 format DS1 (T1.107)
                     dsx1E1          ITU-T G.704, (Table 5A)
                     dsx1E1-CRC      ITU-T G.704, (Table 5B)
                     dsxE1-MF        G.704 (Table 5A) with TS16
                                            multiframing enabled
                     dsx1E1-CRC-MF   G.704 (Table 5B) with TS16
                                            multiframing enabled
                     dsx1Unframed    DS1 with No Framing
                     dsx1E1Unframed  E1 with No Framing (G.703)
                     dsx1DS2M12      DS2 frame format (T1.107)
                     dsx1E2          E2 frame format (G.704)
                     dsx1E1Q50       TS16 bits 5,7,8 set to 101,
                                     [in all other cases it is set
                                     to 111.] (G.704, table 14)
                     dsx1E1Q50CRC    E1Q50 with CRC
                     dsx1J1ESF       J1 according to (JT-G704,
                                            JT-G706, and JT-I431)
                     dsx1J1Unframed  J1 with No Framing

               For clarification, the capacity for each E1 type
               is as listed below:
               dsx1E1Unframed - E1, no framing = 32 x 64k = 2048k
               dsx1E1 or dsx1E1CRC - E1, with framing,
               no signalling = 31 x 64k = 1984k
               dsx1E1MF or dsx1E1CRCMF - E1, with framing,
               signalling = 30 x 64k = 1920k"
        REFERENCE
          "American National Standard for
                telecommunications -
                digital hierarchy - formats specification,
                ANSI T1.107- 1988.
           ITU-T G.703: Physical/Electrical Characteristics

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                of Hierarchical Digital Interfaces, November
                2001.
           ITU-T G.704: Synchronous frame structures used at
                1544, 6312, 2048, 8488 and 44 736 kbit/s
                Hierarchical Levels, July 1995.
           JT-G704: Synchronous frame structures used at
                Primary and Secondary Hierarchical Levels,2002.
           JT-G706. Frame Alignment and Cyclic Redundancy
                Check (CRC) Procedures.
           JT-I431. ISDN Primary Rate User-Network Interface,
                Layer 1 Specifications, 2002 "
   ::= { dsx1ConfigEntry 5 }

   dsx1LineCoding OBJECT-TYPE
        SYNTAX  INTEGER {
                   dsx1JBZS(1),
                   dsx1B8ZS(2),
                   dsx1HDB3(3),
                   dsx1ZBTSI(4),
                   dsx1AMI(5),
                   other(6),
                   dsx1B6ZS(7)
               }
        MAX-ACCESS  read-write
        STATUS  current
        DESCRIPTION
               "This variable describes the variety of Zero Code
               Suppression used on this interface, which in turn
               affects a number of its characteristics.

               dsx1JBZS refers the Jammed Bit Zero Suppression,
               in which the AT&T specification of at least one
               pulse every 8-bit period is literally implemented
               by forcing a pulse in bit 8 of each channel.
               Thus, only 7 bits per channel, or 1.344 Mbps,
               are available for data.

               dsx1B8ZS refers to the use of a specified pattern
               of normal bits and bipolar violations that are
               used to replace a sequence of 8 zero bits.
               ANSI Clear Channels may use dsx1ZBTSI, or Zero
               Byte Time Slot Interchange.

               E1 links, with or without CRC, use dsx1HDB3 or
               dsx1AMI.

               dsx1AMI refers to a mode wherein no Zero Code
               Suppression is present and the line encoding does

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               not solve the problem directly.  In this
               application, the higher layer must provide data
               that meets or exceeds the pulse density
               requirements, such as inverting HDLC data.

               dsx1B6ZS refers to the user of a specified pattern
               of normal bits and bipolar violations that are
               used to replace a sequence of 6 zero bits.  Used
               for DS2.
               For more information about line coding see
               [ANSI-T1.102]"
        ::= { dsx1ConfigEntry 6 }

   dsx1SendCode OBJECT-TYPE
        SYNTAX  INTEGER {
                  dsx1SendNoCode(1),
                  dsx1SendLineCode(2),
                  dsx1SendPayloadCode(3),
                  dsx1SendResetCode(4),
                  dsx1SendQRS(5),
                  dsx1Send511Pattern(6),
                  dsx1Send3in24Pattern(7),
                  dsx1SendOtherTestPattern(8)
                  }
        MAX-ACCESS  read-write
        STATUS  current
        DESCRIPTION
               "This variable indicates what type of code is
               being sent across the DS1 interface by the device.
               Setting this variable causes the interface to send
               the code requested.  The values mean the following:

         dsx1SendNoCode
              sending looped or normal data

         dsx1SendLineCode
              sending a request for a line loopback

         dsx1SendPayloadCode
              sending a request for a payload loopback

         dsx1SendResetCode
              sending a loopback termination request

         dsx1SendQRS
              sending a Quasi-Random Signal (QRS) test
              pattern

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         dsx1Send511Pattern
              sending a 511-bit fixed test pattern

         dsx1Send3in24Pattern
              sending a fixed test pattern of 3 bits set
              in 24

         dsx1SendOtherTestPattern
              sending a test pattern other than those
              described by this object"
        ::= { dsx1ConfigEntry 7 }

   dsx1CircuitIdentifier 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."
        REFERENCE "ITU-T M.1400"
        ::= { dsx1ConfigEntry 8 }

   dsx1LoopbackConfig OBJECT-TYPE
        SYNTAX  INTEGER {
                    dsx1NoLoop(1),
                    dsx1PayloadLoop(2),
                    dsx1LineLoop(3),
                    dsx1OtherLoop(4),
                    dsx1InwardLoop(5),
                    dsx1DualLoop(6)
                  }
        MAX-ACCESS  read-write
        STATUS  current
        DESCRIPTION
               "This variable represents the desired loopback
               configuration of the DS1 interface.  Agents
               supporting read/write access should return
               inconsistentValue in response to a requested
               loopback state that the interface does not
               support.  The values mean:

         dsx1NoLoop
               not in the loopback state.  A device that is not
               capable of performing a loopback on the interface
               shall always return this as its value.

         dsx1PayloadLoop

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               the received signal at this interface is looped
               through the device.  Typically, the received signal
               is looped back for retransmission after it has
               passed through the device's framing function.

         dsx1LineLoop
               the received signal at this interface does not go
               through the device (minimum penetration) but is
               looped back out.

         dsx1OtherLoop
               loopbacks that are not defined here.

         dsx1InwardLoop
               the transmitted signal at this interface is
               looped back and received by the same interface.
               What is transmitted onto the line is product
               dependent.

         dsx1DualLoop
               both dsx1LineLoop and dsx1InwardLoop will be
               active simultaneously."
        ::= { dsx1ConfigEntry 9 }

   dsx1LineStatus OBJECT-TYPE
        SYNTAX  INTEGER (1..131071)
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "This variable indicates the line status of the
               interface.  It contains loopback, failure,
               received alarm and transmitted alarms
               information.

               The dsx1LineStatus is a bitmap represented as a
               sum; therefore, it can represent multiple failures
               (alarms) and a LoopbackState simultaneously.

               dsx1NoAlarm must be set if and only if no other
               flag is set.

               If the dsx1loopbackState bit is set, the loopback
               in effect can be determined from the
               dsx1loopbackConfig object.  The various bit
               positions are as follows:

         1     dsx1NoAlarm           No alarm present
         2     dsx1RcvFarEndLOF      Far end LOF (a.k.a.

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                                     Yellow Alarm)
         4     dsx1XmtFarEndLOF      Near end sending LOF
                                     indication
         8     dsx1RcvAIS            Far end sending AIS
        16     dsx1XmtAIS            Near end sending AIS
        32     dsx1LossOfFrame       Near end LOF (a.k.a.
                                     Red Alarm)
        64     dsx1LossOfSignal      Near end Loss of Signal
       128     dsx1LoopbackState     Near end is looped
       256     dsx1T16AIS            E1 TS16 AIS
       512     dsx1RcvFarEndLOMF     Far end sending TS16 LOMF
      1024     dsx1XmtFarEndLOMF     Near end sending TS16 LOMF
      2048     dsx1RcvTestCode       Near end detects a test code
      4096     dsx1OtherFailure      Any line status not defined
                                     here
      8192     dsx1UnavailSigState   Near end in unavailable
                                     signal state
     16384     dsx1NetEquipOOS       Carrier equipment out of
                                     service
     32768     dsx1RcvPayloadAIS     DS2 payload AIS
     65536     dsx1Ds2PerfThreshold  DS2 performance threshold
                                     exceeded"
        ::= { dsx1ConfigEntry 10 }

   dsx1SignalMode OBJECT-TYPE
        SYNTAX  INTEGER {
                   none(1),
                   robbedBit(2),
                   bitOriented(3),
                   messageOriented(4),
                   other(5)
               }
        MAX-ACCESS  read-write
        STATUS  current
        DESCRIPTION
          "'none' indicates that no bits are reserved for
          signaling on this channel.

          'robbedBit' indicates that DS1 Robbed Bit Signaling
          is in use.

          'bitOriented' indicates that E1 Channel Associated
          Signaling is in use.

          'messageOriented' indicates that Common Channel
          Signaling is in use on either channel 16 of
          an E1 link or channel 24 of a DS1."
        ::= { dsx1ConfigEntry 11 }

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   dsx1TransmitClockSource OBJECT-TYPE
        SYNTAX  INTEGER {
                   loopTiming(1),
                   localTiming(2),
                   throughTiming(3),
                   adaptive (4)
               }
        MAX-ACCESS  read-write
        STATUS  current
        DESCRIPTION
          "The source of transmit clock.

           'loopTiming' indicates that the recovered
           receive clock is used as the transmit clock.

           'localTiming' indicates that a local clock
          source is used or when an external clock is
          attached to the box containing the interface.

           'throughTiming' indicates that recovered
          receive clock from another interface is used as
          the transmit clock.

           'adaptive' indicates that the clock is recovered
          based on the data flow and not based on the
          physical layer"
        ::= { dsx1ConfigEntry 12 }

   dsx1Fdl OBJECT-TYPE
        SYNTAX  INTEGER (1..15)
        MAX-ACCESS  read-write
        STATUS  current
        DESCRIPTION
          "This bitmap describes the use of the
          facilities data link and is the sum of the
          capabilities.  Set any bits that are appropriate:

          other(1),
          dsx1AnsiT1403(2),
          dsx1Att54016(4),
          dsx1FdlNone(8)

           'other' indicates that a protocol other than
          one of the following is used.

           'dsx1AnsiT1403' refers to the FDL exchange
          recommended by ANSI.

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           'dsx1Att54016' refers to ESF FDL exchanges.

           'dsx1FdlNone' indicates that the device does
          not use the FDL."
        ::= { dsx1ConfigEntry 13 }

   dsx1InvalidIntervals OBJECT-TYPE
        SYNTAX  INTEGER (0..96)
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of intervals in the range from 0 to
               dsx1ValidIntervals for which no data is available.
               This object will typically be zero except in cases
               where the data for some intervals is not
               available (e.g., in proxy situations)."
        ::= { dsx1ConfigEntry 14 }

   dsx1LineLength OBJECT-TYPE
        SYNTAX  INTEGER (0..64000)
        UNITS  "meters"
        MAX-ACCESS  read-write
        STATUS  current
        DESCRIPTION
               "The length of the DS1 line in meters.  This
               object provides information for line build-out
               circuitry.  This object is only useful if the
               interface has configurable line build-out
               circuitry."
        ::= { dsx1ConfigEntry 15 }

   dsx1LineStatusLastChange OBJECT-TYPE
        SYNTAX  TimeStamp
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The value of MIB II's sysUpTime object at the
               time this DS1 entered its current line status
               state.  If the current state was entered prior to
               the last re-initialization of the proxy-agent,
               then this object contains a zero value."
        ::= { dsx1ConfigEntry 16 }

   dsx1LineStatusChangeTrapEnable  OBJECT-TYPE
        SYNTAX      INTEGER {
                       enabled(1),
                       disabled(2)
                    }

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        MAX-ACCESS  read-write
        STATUS      current
        DESCRIPTION
               "Indicates whether dsx1LineStatusChange traps
               should be generated for this interface."
        DEFVAL { disabled }
        ::= { dsx1ConfigEntry 17 }

   dsx1LoopbackStatus  OBJECT-TYPE
        SYNTAX      INTEGER (1..127)
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
               "This variable represents the current state of the
               loopback on the DS1 interface.  It contains
               information about loopbacks established by a
               manager and remotely from the far end.

               The dsx1LoopbackStatus is a bitmap represented as
               a sum; therefore, it can represent multiple
               loopbacks simultaneously.

               The various bit positions are as follows:
                1  dsx1NoLoopback
                2  dsx1NearEndPayloadLoopback
                4  dsx1NearEndLineLoopback
                8  dsx1NearEndOtherLoopback
               16  dsx1NearEndInwardLoopback
               32  dsx1FarEndPayloadLoopback
               64  dsx1FarEndLineLoopback"

        ::= { dsx1ConfigEntry 18 }

   dsx1Ds1ChannelNumber  OBJECT-TYPE
        SYNTAX      INTEGER (0..28)
        MAX-ACCESS  read-only
        STATUS      current
        DESCRIPTION
               "This variable represents the channel number of
               the DS1/E1 on its parent DS2/E2 or DS3/E3.  A
               value of 0 indicates that this DS1/E1 does not
               have a parent DS3/E3."
        ::= { dsx1ConfigEntry 19 }

   dsx1Channelization  OBJECT-TYPE
        SYNTAX      INTEGER {
                       disabled(1),
                       enabledDs0(2),

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                       enabledDs1(3)
                    }
        MAX-ACCESS  read-write
        STATUS      current
        DESCRIPTION
               "Indicates whether this DS1/E1 or DS2 is
               channelized or unchannelized.

               The value of enabledDs0(2) indicates that this is a
               DS1 channelized into DS0s.  Setting this value will
               cause the creation, and resetting it to disabled(1)
               will cause the deletion of entries in the ifTable
               for the DS0s that are within the DS1.

               The value of enabledDs1(3) indicates that this is a
               DS2 channelized into DS1s.  Setting this value will
               cause the creation, and resetting it to disabled(1)
               will cause the deletion of entries in the ifTable
               for the DS1s that are within the DS2."

        ::= { dsx1ConfigEntry 20 }

   dsx1LineMode  OBJECT-TYPE
        SYNTAX      INTEGER {
                       csu(1),
                       dsu(2)
                     }
        MAX-ACCESS  read-write
        STATUS      current
        DESCRIPTION
               "This setting puts the T1 framer into either
               long-haul (CSU) mode or short-haul (DSU) mode."
        ::= { dsx1ConfigEntry 21 }

   dsx1LineBuildOut  OBJECT-TYPE
        SYNTAX      INTEGER {
                       notApplicable(1),
                       neg75dB(2),
                       neg15dB(3),
                       neg225dB(4),
                       zerodB(5)
                    }
        MAX-ACCESS  read-write
        STATUS      current
        DESCRIPTION
               "Attenuation setting for T1 framer in long haul
               (CSU) mode.  The optional values are -7.5dB,
               -15dB, -22.5dB, and 0dB."

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        ::= { dsx1ConfigEntry 22 }

   dsx1LineImpedance   OBJECT-TYPE
        SYNTAX      INTEGER {
                       notApplicable(1),
                       unbalanced75ohms(2),
                       balanced100ohms(3),
                       balanced120ohms(4)
                    }
        MAX-ACCESS  read-write
        STATUS      current
        DESCRIPTION
               "Nominal line impedance.  For T1 and J1 lines, the
               value is typically balanced100ohms(3).  For E1
               lines, the value is typically unbalanced75ohms(2)
               and balanced120ohms(4).  When this object does not
               apply, or when the appropriate value is not known,
               the value should be set to notApplicable(1)."
        ::= { dsx1ConfigEntry 23 }

   -- The DS1 Current Table
   dsx1CurrentTable OBJECT-TYPE
        SYNTAX  SEQUENCE OF Dsx1CurrentEntry
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
               "The DS1 Current table contains various statistics
               being collected for the current 15-minute
               interval."
        ::= { ds1 7 }

   dsx1CurrentEntry OBJECT-TYPE
        SYNTAX  Dsx1CurrentEntry
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
               "An entry in the DS1 Current table."
        INDEX   { dsx1CurrentIndex }
        ::= { dsx1CurrentTable 1 }

   Dsx1CurrentEntry ::=
        SEQUENCE {
            dsx1CurrentIndex            InterfaceIndex,
            dsx1CurrentESs              PerfCurrentCount,
            dsx1CurrentSESs             PerfCurrentCount,
            dsx1CurrentSEFSs            PerfCurrentCount,
            dsx1CurrentUASs             PerfCurrentCount,
            dsx1CurrentCSSs             PerfCurrentCount,

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            dsx1CurrentPCVs             PerfCurrentCount,
            dsx1CurrentLESs             PerfCurrentCount,
            dsx1CurrentBESs             PerfCurrentCount,
            dsx1CurrentDMs              PerfCurrentCount,
            dsx1CurrentLCVs             PerfCurrentCount
   }

   dsx1CurrentIndex OBJECT-TYPE
        SYNTAX  InterfaceIndex
        MAX-ACCESS  read-only  -- read-only since originally an
                               -- SMIv1 index
        STATUS  current
        DESCRIPTION
               "The index value that uniquely identifies the DS1
               interface to which this entry is applicable.  The
               interface identified by a particular value of this
               index is the same interface as identified by the
               same value as a dsx1LineIndex object instance."
        ::= { dsx1CurrentEntry 1 }

   dsx1CurrentESs OBJECT-TYPE
        SYNTAX  PerfCurrentCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Errored Seconds."
        ::= { dsx1CurrentEntry 2 }

   dsx1CurrentSESs OBJECT-TYPE
        SYNTAX  PerfCurrentCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Severely Errored Seconds."
        ::= { dsx1CurrentEntry 3 }

   dsx1CurrentSEFSs OBJECT-TYPE
        SYNTAX  PerfCurrentCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Severely Errored Framing Seconds."
        ::= { dsx1CurrentEntry 4 }

   dsx1CurrentUASs OBJECT-TYPE
        SYNTAX  PerfCurrentCount
        MAX-ACCESS  read-only
        STATUS  current

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        DESCRIPTION
               "The number of Unavailable Seconds."
        ::= { dsx1CurrentEntry 5 }

   dsx1CurrentCSSs OBJECT-TYPE
        SYNTAX  PerfCurrentCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Controlled Slip Seconds."
        ::= { dsx1CurrentEntry 6 }

   dsx1CurrentPCVs OBJECT-TYPE
        SYNTAX  PerfCurrentCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Path Coding Violations."
        ::= { dsx1CurrentEntry 7 }

   dsx1CurrentLESs OBJECT-TYPE
        SYNTAX  PerfCurrentCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Line Errored Seconds."
        ::= { dsx1CurrentEntry 8 }

   dsx1CurrentBESs OBJECT-TYPE
        SYNTAX PerfCurrentCount
        MAX-ACCESS read-only
        STATUS current
        DESCRIPTION
               "The number of Bursty Errored Seconds."
        ::= { dsx1CurrentEntry 9 }

   dsx1CurrentDMs OBJECT-TYPE
        SYNTAX PerfCurrentCount
        MAX-ACCESS read-only
        STATUS deprecated
        DESCRIPTION
               "The number of Degraded Minutes."
        ::= { dsx1CurrentEntry 10 }

   dsx1CurrentLCVs OBJECT-TYPE
        SYNTAX PerfCurrentCount
        MAX-ACCESS read-only
        STATUS current

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        DESCRIPTION
               "The number of Line Coding Violations (LCVs)."
        ::= { dsx1CurrentEntry 11 }

   -- The DS1 Interval Table
   dsx1IntervalTable OBJECT-TYPE
        SYNTAX  SEQUENCE OF Dsx1IntervalEntry
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
               "The DS1 Interval table contains various
               statistics collected by each DS1 interface over
               the previous 24 hours of operation.  The past 24
               hours are broken into 96 completed 15-minute
               intervals.  Each row in this table represents one
               such interval (identified by dsx1IntervalNumber)
               for one specific instance (identified by
               dsx1IntervalIndex)."
        ::= { ds1 8 }

   dsx1IntervalEntry OBJECT-TYPE
        SYNTAX  Dsx1IntervalEntry
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
               "An entry in the DS1 Interval table."
        INDEX   { dsx1IntervalIndex, dsx1IntervalNumber }
        ::= { dsx1IntervalTable 1 }

   Dsx1IntervalEntry ::=
        SEQUENCE {
            dsx1IntervalIndex             InterfaceIndex,
            dsx1IntervalNumber            INTEGER,
            dsx1IntervalESs               PerfIntervalCount,
            dsx1IntervalSESs              PerfIntervalCount,
            dsx1IntervalSEFSs             PerfIntervalCount,
            dsx1IntervalUASs              PerfIntervalCount,
            dsx1IntervalCSSs              PerfIntervalCount,
            dsx1IntervalPCVs              PerfIntervalCount,
            dsx1IntervalLESs              PerfIntervalCount,
            dsx1IntervalBESs              PerfIntervalCount,
            dsx1IntervalDMs               PerfIntervalCount,
            dsx1IntervalLCVs              PerfIntervalCount,
            dsx1IntervalValidData         TruthValue
   }

   dsx1IntervalIndex OBJECT-TYPE
        SYNTAX  InterfaceIndex

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        MAX-ACCESS  read-only  -- read-only since originally an
                               -- SMIv1 index
        STATUS  current
        DESCRIPTION
               "The index value that uniquely identifies the DS1
               interface to which this entry is applicable.  The
               interface identified by a particular value of this
               index is the same interface as identified by the
               same value as a dsx1LineIndex object instance."
        ::= { dsx1IntervalEntry 1 }

   dsx1IntervalNumber OBJECT-TYPE
        SYNTAX  INTEGER (1..96)
        MAX-ACCESS  read-only  -- read-only since originally an
                               -- SMIv1 index
        STATUS  current
        DESCRIPTION
               "A number between 1 and 96, where 1 is the most
               recently completed 15-minute interval and 96 is
               the 15-minute interval completed 23 hours and 45
               minutes prior to interval 1."
        ::= { dsx1IntervalEntry 2 }

   dsx1IntervalESs OBJECT-TYPE
        SYNTAX  PerfIntervalCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Errored Seconds."
        ::= { dsx1IntervalEntry 3 }

   dsx1IntervalSESs OBJECT-TYPE
        SYNTAX  PerfIntervalCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Severely Errored Seconds."
        ::= { dsx1IntervalEntry 4 }

   dsx1IntervalSEFSs OBJECT-TYPE
        SYNTAX  PerfIntervalCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Severely Errored Framing Seconds."
        ::= { dsx1IntervalEntry 5 }

   dsx1IntervalUASs OBJECT-TYPE

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        SYNTAX  PerfIntervalCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Unavailable Seconds.  This object
               may decrease if the occurrence of unavailable
               seconds occurs across an interval boundary."
        ::= { dsx1IntervalEntry 6 }

   dsx1IntervalCSSs OBJECT-TYPE
        SYNTAX  PerfIntervalCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Controlled Slip Seconds."
        ::= { dsx1IntervalEntry 7 }

   dsx1IntervalPCVs OBJECT-TYPE
        SYNTAX  PerfIntervalCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Path Coding Violations."
        ::= { dsx1IntervalEntry 8 }

   dsx1IntervalLESs OBJECT-TYPE
        SYNTAX  PerfIntervalCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Line Errored Seconds."
        ::= { dsx1IntervalEntry 9 }

   dsx1IntervalBESs OBJECT-TYPE
        SYNTAX PerfIntervalCount
        MAX-ACCESS read-only
        STATUS current
        DESCRIPTION
               "The number of Bursty Errored Seconds."
        ::= { dsx1IntervalEntry 10 }

   dsx1IntervalDMs OBJECT-TYPE
        SYNTAX PerfIntervalCount
        MAX-ACCESS read-only
        STATUS deprecated
        DESCRIPTION
               "The number of Degraded Minutes."
        ::= { dsx1IntervalEntry 11 }

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   dsx1IntervalLCVs OBJECT-TYPE
        SYNTAX PerfIntervalCount
        MAX-ACCESS read-only
        STATUS current
        DESCRIPTION
               "The number of Line Coding Violations."
        ::= { dsx1IntervalEntry 12 }

   dsx1IntervalValidData OBJECT-TYPE
        SYNTAX TruthValue
        MAX-ACCESS read-only
        STATUS current
        DESCRIPTION
               "This variable indicates whether the data for this
               interval is valid."
        ::= { dsx1IntervalEntry 13 }

   -- The DS1 Total Table
   dsx1TotalTable OBJECT-TYPE
        SYNTAX  SEQUENCE OF Dsx1TotalEntry
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
               "The DS1 Total table contains the cumulative sum
               of the various statistics for the 24-hour period
               preceding the current interval."
        ::= { ds1 9 }

   dsx1TotalEntry OBJECT-TYPE
        SYNTAX  Dsx1TotalEntry
        MAX-ACCESS  not-accessible
        STATUS  current
        DESCRIPTION
               "An entry in the DS1 Total table."
        INDEX   { dsx1TotalIndex }
        ::= { dsx1TotalTable 1 }

   Dsx1TotalEntry ::=
        SEQUENCE {
            dsx1TotalIndex                InterfaceIndex,
            dsx1TotalESs                  PerfTotalCount,
            dsx1TotalSESs                 PerfTotalCount,
            dsx1TotalSEFSs                PerfTotalCount,
            dsx1TotalUASs                 PerfTotalCount,
            dsx1TotalCSSs                 PerfTotalCount,
            dsx1TotalPCVs                 PerfTotalCount,
            dsx1TotalLESs                 PerfTotalCount,
            dsx1TotalBESs                 PerfTotalCount,

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            dsx1TotalDMs                  PerfTotalCount,
            dsx1TotalLCVs                 PerfTotalCount
   }

   dsx1TotalIndex OBJECT-TYPE
        SYNTAX  InterfaceIndex
        MAX-ACCESS  read-only  -- read-only since originally an
                               -- SMIv1 index
        STATUS  current
        DESCRIPTION
               "The index value that uniquely identifies the DS1
               interface to which this entry is applicable.  The
               interface identified by a particular value of this
               index is the same interface as identified by the
               same value as a dsx1LineIndex object instance."
        ::= { dsx1TotalEntry 1 }

   dsx1TotalESs OBJECT-TYPE
        SYNTAX  PerfTotalCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Errored Seconds encountered by a DS1
               interface in the previous 24-hour interval.
               Invalid 15-minute intervals count as 0."
        ::= { dsx1TotalEntry 2 }

   dsx1TotalSESs OBJECT-TYPE
        SYNTAX  PerfTotalCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Severely Errored Seconds
               encountered by a DS1 interface in the previous
               24-hour interval.  Invalid 15-minute intervals
               count as 0."
        ::= { dsx1TotalEntry 3 }

   dsx1TotalSEFSs OBJECT-TYPE
        SYNTAX  PerfTotalCount
        MAX-ACCESS  read-only
        STATUS  current
        DESCRIPTION
               "The number of Severely Errored Framing Seconds
               encountered by a DS1 interface in the previous
               24-hour interval.  Invalid 15-minute intervals
               count as 0."
        ::= { dsx1TotalEntry 4 }


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