     DS1-MIB DEFINITIONS ::= BEGIN

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

     ds1 MODULE-IDENTITY
         LAST-UPDATED "9808011830Z"
         ORGANIZATION "IETF Trunk MIB Working Group"
         CONTACT-INFO
           "        David Fowler

            Postal: Newbridge Networks Corporation
                    600 March Road
                    Kanata, Ontario, Canada K2K 2E6

                    Tel: +1 613 591 3600

                    Fax: +1 613 599 3667

            E-mail: davef@newbridge.com"
         DESCRIPTION
              "The MIB module to describe DS1, E1, DS2, and
               E2 interfaces objects."
         ::= { 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,
              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
     }

     dsx1LineIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          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 ifStackTable and ds0/ds0bundle mibs.

                 Previously, this object is 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 an 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
                 of ifIndex from the Interfaces table of MIB II
                 (RFC 1213)."
          ::= { 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),
                     dsx2E2(11)
                 }
          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 Recommendation G.704
                                  (Table 4a)
                 dsx1E1-CRC      ITU-T Recommendation G.704
                                  (Table 4b)
                 dsxE1-MF        G.704 (Table 4a) with TS16
                                  multiframing enabled
                 dsx1E1-CRC-MF   G.704 (Table 4b) 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)

                 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

                 For further information See ITU-T Recomm G.704"
          ::= { 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 periods is literally implemented
                 by forcing a pulse in bit 8 of each channel.
                 Thus, only seven bits per channel, or 1.344 Mbps,
                 is available for data.

                 dsx1B8ZS refers to the use of a specified pattern
                 of normal bits and bipolar violations which are
                 used to replace a sequence of eight 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
                 not solve the problem directly.  In this
                 application, the higher layer must provide data
                 which meets or exceeds the pulse density
                 requirements, such as inverting HDLC data.

                 dsx1B6ZS refers to the user of a specifed pattern
                 of normal bits and bipolar violations which are
                 used to replace a sequence of six zero bits.  Used
                 for DS2."
          ::= { 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:
           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

           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."
          ::= { 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
                  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 bit map 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:
      1     dsx1NoAlarm           No alarm present
      2     dsx1RcvFarEndLOF      Far end LOF (a.k.a., 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  Sig-
            naling is in use.

            'bitOriented' indicates that E1 Channel  Asso-
            ciated Signaling is in use.

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

     dsx1TransmitClockSource OBJECT-TYPE
          SYNTAX  INTEGER {
                     loopTiming(1),
                     localTiming(2),
                     throughTiming(3)
                 }
          MAX-ACCESS  read-write
          STATUS  current
          DESCRIPTION
            "The source of Transmit Clock.
             'loopTiming' indicates that the recovered re-
            ceive 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 re-
            ceive clock from another interface is used as
            the transmit clock."
          ::= { dsx1ConfigEntry 12 }

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

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

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

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

             '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
                 are 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
                 objects 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)
                      }
          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 bit map represented as
                 a sum, therefore is can represent multiple
                 loopbacks simultaneously.

                 The various bit positions are:
                  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 indicated this DS1/E1 does not have a
                 parent DS3/E3."
     ::= { dsx1ConfigEntry 19 }

     dsx1Channelization  OBJECT-TYPE
          SYNTAX      INTEGER {
                         disabled(1),
                         enabledDs0(2),
                         enabledDs1(3)
                      }
          MAX-ACCESS  read-write
          STATUS      current
          DESCRIPTION
                 "Indicates whether this ds1/e1 is channelized or
                 unchannelized.  The value of enabledDs0 indicates
                 that this is a DS1 channelized into DS0s.  The
                 value of enabledDs1 indicated that this is a DS2
                 channelized into DS1s.  Setting this value will
                 cause the creation or deletion of entries in the
                 ifTable for the DS0s that are within the DS1."
     ::= { dsx1ConfigEntry 20 }

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

     dsx1CurrentIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which 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
          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 current
          DESCRIPTION
                 "The number of Degraded Minutes."
          ::= { dsx1CurrentEntry 10 }

     dsx1CurrentLCVs OBJECT-TYPE
          SYNTAX PerfCurrentCount
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The number of Line Code 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
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which 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
          STATUS  current
          DESCRIPTION
                 "A number between 1 and 96, where 1 is the most
                 recently completed 15 minute interval and 96 is
                 the 15 minutes 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
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Unavailable Seconds.  This object
                 may decrease if the occurance of unavailable
                 seconds occurs across an inteval 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 current
          DESCRIPTION
                 "The number of Degraded Minutes."
          ::= { dsx1IntervalEntry 11 }

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

     dsx1IntervalValidData OBJECT-TYPE
          SYNTAX TruthValue
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "This variable indicates if 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,
              dsx1TotalDMs                  PerfTotalCount,
              dsx1TotalLCVs                 PerfTotalCount
     }

     dsx1TotalIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which 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 sum 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 }

     dsx1TotalUASs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Unavailable Seconds encountered by
                 a DS1 interface in the previous 24 hour interval.
                 Invalid 15 minute intervals count as 0."
          ::= { dsx1TotalEntry 5 }

     dsx1TotalCSSs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Controlled Slip Seconds encountered
                 by a DS1 interface in the previous 24 hour
                 interval.  Invalid 15 minute intervals count as
                 0."
          ::= { dsx1TotalEntry 6 }

     dsx1TotalPCVs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Path Coding Violations encountered
                 by a DS1 interface in the previous 24 hour
                 interval.  Invalid 15 minute intervals count as
                 0."
          ::= { dsx1TotalEntry 7 }

     dsx1TotalLESs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Line Errored Seconds encountered by
                 a DS1 interface in the previous 24 hour interval.
                 Invalid 15 minute intervals count as 0."
          ::= { dsx1TotalEntry 8 }

     dsx1TotalBESs OBJECT-TYPE
          SYNTAX PerfTotalCount
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The number of Bursty Errored Seconds (BESs)
                 encountered by a DS1 interface in the previous 24
                 hour interval. Invalid 15 minute intervals count
                 as 0."
          ::= { dsx1TotalEntry 9 }

     dsx1TotalDMs OBJECT-TYPE
          SYNTAX PerfTotalCount
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The number of Degraded Minutes (DMs) encountered
                 by a DS1 interface in the previous 24 hour
                 interval.  Invalid 15 minute intervals count as
                 0."
          ::= { dsx1TotalEntry 10 }

     dsx1TotalLCVs OBJECT-TYPE
          SYNTAX PerfTotalCount
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The number of Line Code Violations (LCVs)
                 encountered by a DS1 interface in the current 15
                 minute interval.  Invalid 15 minute intervals
                 count as 0."
          ::= { dsx1TotalEntry 11 }

     -- The DS1 Channel Table
     dsx1ChanMappingTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF Dsx1ChanMappingEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "The DS1 Channel Mapping table.  This table maps a
                 DS1 channel number on a particular DS3 into an
                 ifIndex.  In the presence of DS2s, this table can
                 be used to map a DS2 channel number on a DS3 into
                 an ifIndex, or used to map a DS1 channel number on
                 a DS2 onto an ifIndex."
          ::= { ds1 16 }

     dsx1ChanMappingEntry OBJECT-TYPE
          SYNTAX  Dsx1ChanMappingEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "An entry in the DS1 Channel Mapping table.  There
                 is an entry in this table corresponding to each
                 ds1 ifEntry within any interface that is
                 channelized to the individual ds1 ifEntry level.

                 This table is intended to facilitate mapping from
                 channelized interface / channel number to DS1
                 ifEntry.  (e.g. mapping (DS3 ifIndex, DS1 Channel
                 Number) -> ifIndex)

                 While this table provides information that can
                 also be found in the ifStackTable and
                 dsx1ConfigTable, it provides this same information
                 with a single table lookup, rather than by walking
                 the ifStackTable to find the various constituent
                 ds1 ifTable entries, and testing various
                 dsx1ConfigTable entries to check for the entry
                 with the applicable DS1 channel number."
          INDEX   { ifIndex, dsx1Ds1ChannelNumber }
          ::= { dsx1ChanMappingTable 1 }

     Dsx1ChanMappingEntry ::=
          SEQUENCE {
              dsx1ChanMappedIfIndex  InterfaceIndex
     }

     dsx1ChanMappedIfIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "This object indicates the ifIndex value assigned
                 by the agent for the individual ds1 ifEntry that
                 corresponds to the given DS1 channel number
                 (specified by the INDEX element
                 dsx1Ds1ChannelNumber) of the given channelized
                 interface (specified by INDEX element ifIndex)."
          ::= { dsx1ChanMappingEntry 1 }

     -- The DS1 Far End Current Table

     dsx1FarEndCurrentTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF Dsx1FarEndCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "The DS1 Far End Current table contains various
                 statistics being collected for the current 15
                 minute interval.  The statistics are collected
                 from the far end messages on the Facilities Data
                 Link.  The definitions are the same as described
                 for the near-end information."
          ::= { ds1 10 }

     dsx1FarEndCurrentEntry OBJECT-TYPE
          SYNTAX  Dsx1FarEndCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "An entry in the DS1 Far End Current table."
          INDEX   { dsx1FarEndCurrentIndex }
          ::= { dsx1FarEndCurrentTable 1 }

     Dsx1FarEndCurrentEntry ::=
          SEQUENCE {
              dsx1FarEndCurrentIndex      InterfaceIndex,
              dsx1FarEndTimeElapsed       INTEGER,
              dsx1FarEndValidIntervals    INTEGER,
              dsx1FarEndCurrentESs        PerfCurrentCount,
              dsx1FarEndCurrentSESs       PerfCurrentCount,
              dsx1FarEndCurrentSEFSs      PerfCurrentCount,
              dsx1FarEndCurrentUASs       PerfCurrentCount,
              dsx1FarEndCurrentCSSs       PerfCurrentCount,
              dsx1FarEndCurrentLESs       PerfCurrentCount,
              dsx1FarEndCurrentPCVs       PerfCurrentCount,
              dsx1FarEndCurrentBESs       PerfCurrentCount,
              dsx1FarEndCurrentDMs        PerfCurrentCount,
              dsx1FarEndInvalidIntervals  INTEGER
     }

     dsx1FarEndCurrentIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which uniquely identifies the DS1
                 interface to which this entry is applicable.  The
                 interface identified by a particular value of this
                 index is identical to the interface identified by
                 the same value of dsx1LineIndex."
          ::= { dsx1FarEndCurrentEntry 1 }

     dsx1FarEndTimeElapsed 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 far 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."
          ::= { dsx1FarEndCurrentEntry 2 }

     dsx1FarEndValidIntervals OBJECT-TYPE
          SYNTAX  INTEGER (0..96)
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                      "The number of previous far 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 far end intervals
                 since the interface has been online."
          ::= { dsx1FarEndCurrentEntry 3 }

     dsx1FarEndCurrentESs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Errored Seconds."
          ::= { dsx1FarEndCurrentEntry 4 }

     dsx1FarEndCurrentSESs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Severely Errored Seconds."
          ::= { dsx1FarEndCurrentEntry 5 }

     dsx1FarEndCurrentSEFSs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Severely Errored Framing
                 Seconds."
          ::= { dsx1FarEndCurrentEntry 6 }

     dsx1FarEndCurrentUASs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Unavailable Seconds."
          ::= { dsx1FarEndCurrentEntry 7 }

     dsx1FarEndCurrentCSSs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Controlled Slip Seconds."
          ::= { dsx1FarEndCurrentEntry 8 }

     dsx1FarEndCurrentLESs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Line Errored Seconds."
          ::= { dsx1FarEndCurrentEntry 9 }

     dsx1FarEndCurrentPCVs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Path Coding Violations."
          ::= { dsx1FarEndCurrentEntry 10 }

     dsx1FarEndCurrentBESs OBJECT-TYPE
          SYNTAX PerfCurrentCount
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The number of Far End Bursty Errored Seconds."
          ::= { dsx1FarEndCurrentEntry 11 }

     dsx1FarEndCurrentDMs OBJECT-TYPE
          SYNTAX PerfCurrentCount
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The number of Far End Degraded Minutes."
          ::= { dsx1FarEndCurrentEntry 12 }

     dsx1FarEndInvalidIntervals OBJECT-TYPE
          SYNTAX  INTEGER (0..96)
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of intervals in the range from 0 to
                 dsx1FarEndValidIntervals 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)."
          ::= { dsx1FarEndCurrentEntry 13 }

     -- The DS1 Far End Interval Table
     dsx1FarEndIntervalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF Dsx1FarEndIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "The DS1 Far End 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
                 dsx1FarEndIntervalNumber) for one specific
                 instance (identified by dsx1FarEndIntervalIndex)."
          ::= { ds1 11 }

     dsx1FarEndIntervalEntry OBJECT-TYPE
          SYNTAX  Dsx1FarEndIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "An entry in the DS1 Far End Interval table."
          INDEX   { dsx1FarEndIntervalIndex,
                    dsx1FarEndIntervalNumber }
          ::= { dsx1FarEndIntervalTable 1 }

     Dsx1FarEndIntervalEntry ::=
          SEQUENCE {
              dsx1FarEndIntervalIndex       InterfaceIndex,
              dsx1FarEndIntervalNumber      INTEGER,
              dsx1FarEndIntervalESs         PerfIntervalCount,
              dsx1FarEndIntervalSESs        PerfIntervalCount,
              dsx1FarEndIntervalSEFSs       PerfIntervalCount,
              dsx1FarEndIntervalUASs        PerfIntervalCount,
              dsx1FarEndIntervalCSSs        PerfIntervalCount,
              dsx1FarEndIntervalLESs        PerfIntervalCount,
              dsx1FarEndIntervalPCVs        PerfIntervalCount,
              dsx1FarEndIntervalBESs        PerfIntervalCount,
              dsx1FarEndIntervalDMs         PerfIntervalCount,
              dsx1FarEndIntervalValidData   TruthValue
     }

     dsx1FarEndIntervalIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which uniquely identifies the DS1
                 interface to which this entry is applicable.  The
                 interface identified by a particular value of this
                 index is identical to the interface identified by
                 the same value of dsx1LineIndex."
          ::= { dsx1FarEndIntervalEntry 1 }

     dsx1FarEndIntervalNumber OBJECT-TYPE
          SYNTAX  INTEGER (1..96)
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "A number between 1 and 96, where 1 is the most
                 recently completed 15 minute interval and 96 is
                 the 15 minutes interval completed 23 hours and 45
                 minutes prior to interval 1."
          ::= { dsx1FarEndIntervalEntry 2 }

     dsx1FarEndIntervalESs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Errored Seconds."
          ::= { dsx1FarEndIntervalEntry 3 }

     dsx1FarEndIntervalSESs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Severely Errored Seconds."
          ::= { dsx1FarEndIntervalEntry 4 }

     dsx1FarEndIntervalSEFSs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Severely Errored Framing
                 Seconds."
          ::= { dsx1FarEndIntervalEntry 5 }

     dsx1FarEndIntervalUASs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Unavailable Seconds."
          ::= { dsx1FarEndIntervalEntry 6 }

     dsx1FarEndIntervalCSSs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Controlled Slip Seconds."
          ::= { dsx1FarEndIntervalEntry 7 }

     dsx1FarEndIntervalLESs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Line Errored Seconds."
          ::= { dsx1FarEndIntervalEntry 8 }

     dsx1FarEndIntervalPCVs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Path Coding Violations."
          ::= { dsx1FarEndIntervalEntry 9 }

     dsx1FarEndIntervalBESs OBJECT-TYPE
          SYNTAX PerfIntervalCount
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The number of Far End Bursty Errored Seconds."
          ::= { dsx1FarEndIntervalEntry 10 }

     dsx1FarEndIntervalDMs OBJECT-TYPE
          SYNTAX PerfIntervalCount
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The number of Far End Degraded Minutes."
          ::= { dsx1FarEndIntervalEntry 11 }

     dsx1FarEndIntervalValidData OBJECT-TYPE
          SYNTAX TruthValue
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                      "This variable indicates if the data for this
                 interval is valid."
          ::= { dsx1FarEndIntervalEntry 12 }

     -- The DS1 Far End Total Table

     dsx1FarEndTotalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF Dsx1FarEndTotalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "The DS1 Far End Total Table contains the
                 cumulative sum of the various statistics for the
                 24 hour period preceding the current interval."
          ::= { ds1 12 }

     dsx1FarEndTotalEntry OBJECT-TYPE
          SYNTAX  Dsx1FarEndTotalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "An entry in the DS1 Far End Total table."
          INDEX   { dsx1FarEndTotalIndex }
          ::= { dsx1FarEndTotalTable 1 }

     Dsx1FarEndTotalEntry ::=
          SEQUENCE {
              dsx1FarEndTotalIndex          InterfaceIndex,
              dsx1FarEndTotalESs            PerfTotalCount,
              dsx1FarEndTotalSESs           PerfTotalCount,
              dsx1FarEndTotalSEFSs          PerfTotalCount,
              dsx1FarEndTotalUASs           PerfTotalCount,
              dsx1FarEndTotalCSSs           PerfTotalCount,
              dsx1FarEndTotalLESs           PerfTotalCount,
              dsx1FarEndTotalPCVs           PerfTotalCount,
              dsx1FarEndTotalBESs           PerfTotalCount,
              dsx1FarEndTotalDMs            PerfTotalCount
     }

     dsx1FarEndTotalIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which uniquely identifies the DS1
                 interface to which this entry is applicable.  The
                 interface identified by a particular value of this
                 index is identical to the interface identified by
                 the same value of dsx1LineIndex."
          ::= { dsx1FarEndTotalEntry 1 }

     dsx1FarEndTotalESs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Errored Seconds encountered
                 by a DS1 interface in the previous 24 hour
                 interval.  Invalid 15 minute intervals count as
                 0."
          ::= { dsx1FarEndTotalEntry 2 }

     dsx1FarEndTotalSESs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Severely Errored Seconds
                 encountered by a DS1 interface in the previous 24
                 hour interval.  Invalid 15 minute intervals count
                 as 0."
          ::= { dsx1FarEndTotalEntry 3 }

     dsx1FarEndTotalSEFSs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Severely Errored Framing
                 Seconds encountered by a DS1 interface in the
                 previous 24 hour interval. Invalid 15 minute
                 intervals count as 0."
          ::= { dsx1FarEndTotalEntry 4 }

     dsx1FarEndTotalUASs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Unavailable Seconds encountered by
                 a DS1 interface in the previous 24 hour interval.
                 Invalid 15 minute intervals count as 0."
          ::= { dsx1FarEndTotalEntry 5 }

     dsx1FarEndTotalCSSs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Controlled Slip Seconds
                 encountered by a DS1 interface in the previous 24
                 hour interval.  Invalid 15 minute intervals count
                 as 0."
          ::= { dsx1FarEndTotalEntry 6 }

     dsx1FarEndTotalLESs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Line Errored Seconds
                 encountered by a DS1 interface in the previous 24
                 hour interval.  Invalid 15 minute intervals count
                 as 0."
          ::= { dsx1FarEndTotalEntry 7 }

     dsx1FarEndTotalPCVs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Far End Path Coding Violations
                 reported via the far end block error count
                 encountered by a DS1 interface in the previous 24
                 hour interval.  Invalid 15 minute intervals count
                 as 0."
          ::= { dsx1FarEndTotalEntry 8 }

     dsx1FarEndTotalBESs OBJECT-TYPE
          SYNTAX PerfTotalCount
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The number of Bursty Errored Seconds (BESs)
                 encountered by a DS1 interface in the previous 24
                 hour interval. Invalid 15 minute intervals count
                 as 0."
          ::= { dsx1FarEndTotalEntry 9 }

     dsx1FarEndTotalDMs OBJECT-TYPE
          SYNTAX PerfTotalCount
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "The number of Degraded Minutes (DMs) encountered
                 by a DS1 interface in the previous 24 hour
                 interval.  Invalid 15 minute intervals count as
                 0."
          ::= { dsx1FarEndTotalEntry 10 }

     -- The DS1 Fractional Table
     dsx1FracTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF Dsx1FracEntry
          MAX-ACCESS  not-accessible
          STATUS  deprecated
          DESCRIPTION
                 "This table is deprecated in favour of using
                 ifStackTable.

                 The table was mandatory for systems dividing a DS1
                 into channels containing different data streams
                 that are of local interest.  Systems which are
                 indifferent to data content, such as CSUs, need
                 not implement it.

                 The DS1 fractional table identifies which DS1
                 channels associated with a CSU are being used to
                 support a logical interface, i.e., an entry in the
                 interfaces table from the Internet-standard MIB.

                 For example, consider an application managing a
                 North American ISDN Primary Rate link whose
                 division is a 384 kbit/s H1 _B_ Channel for Video,
                 a second H1 for data to a primary routing peer,
                 and 12 64 kbit/s H0 _B_ Channels. Consider that
                 some subset of the H0 channels are used for voice
                 and the remainder are available for dynamic data
                 calls.

                 We count a total of 14 interfaces multiplexed onto
                 the DS1 interface. Six DS1 channels (for the sake
                 of the example, channels 1..6) are used for Video,
                 six more (7..11 and 13) are used for data, and the
                 remaining 12 are are in channels 12 and 14..24.

                 Let us further imagine that ifIndex 2 is of type
                 DS1 and refers to the DS1 interface, and that the
                 interfaces layered onto it are numbered 3..16.

                 We might describe the allocation of channels, in
                 the dsx1FracTable, as follows:
               dsx1FracIfIndex.2. 1 = 3  dsx1FracIfIndex.2.13 = 4
               dsx1FracIfIndex.2. 2 = 3  dsx1FracIfIndex.2.14 = 6
               dsx1FracIfIndex.2. 3 = 3  dsx1FracIfIndex.2.15 = 7
               dsx1FracIfIndex.2. 4 = 3  dsx1FracIfIndex.2.16 = 8
               dsx1FracIfIndex.2. 5 = 3  dsx1FracIfIndex.2.17 = 9
               dsx1FracIfIndex.2. 6 = 3  dsx1FracIfIndex.2.18 = 10
               dsx1FracIfIndex.2. 7 = 4  dsx1FracIfIndex.2.19 = 11
               dsx1FracIfIndex.2. 8 = 4  dsx1FracIfIndex.2.20 = 12
               dsx1FracIfIndex.2. 9 = 4  dsx1FracIfIndex.2.21 = 13
               dsx1FracIfIndex.2.10 = 4  dsx1FracIfIndex.2.22 = 14
               dsx1FracIfIndex.2.11 = 4  dsx1FracIfIndex.2.23 = 15
               dsx1FracIfIndex.2.12 = 5  dsx1FracIfIndex.2.24 = 16

                 For North American (DS1) interfaces, there are 24
                 legal channels, numbered 1 through 24.

                 For G.704 interfaces, there are 31 legal channels,
                 numbered 1 through 31.  The channels (1..31)
                 correspond directly to the equivalently numbered
                 time-slots."
          ::= { ds1 13 }

     dsx1FracEntry OBJECT-TYPE
          SYNTAX  Dsx1FracEntry
          MAX-ACCESS  not-accessible
          STATUS  deprecated
          DESCRIPTION
             "An entry in the DS1 Fractional table."
         INDEX   { dsx1FracIndex, dsx1FracNumber }
         ::= { dsx1FracTable 1 }

     Dsx1FracEntry ::=
         SEQUENCE {
             dsx1FracIndex        INTEGER,
             dsx1FracNumber       INTEGER,
             dsx1FracIfIndex      INTEGER
         }

     dsx1FracIndex OBJECT-TYPE
         SYNTAX  INTEGER (1..'7fffffff'h)
         MAX-ACCESS  read-only
         STATUS  deprecated
         DESCRIPTION
            "The index value which 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  an  dsx1LineIndex
            object instance."
        ::= { dsx1FracEntry 1 }

     dsx1FracNumber OBJECT-TYPE
         SYNTAX  INTEGER (1..31)
         MAX-ACCESS  read-only
         STATUS  deprecated
         DESCRIPTION
            "The channel number for this entry."
        ::= { dsx1FracEntry 2 }

     dsx1FracIfIndex OBJECT-TYPE
         SYNTAX  INTEGER (1..'7fffffff'h)
         MAX-ACCESS  read-write
         STATUS  deprecated
         DESCRIPTION
            "An index value that uniquely identifies an
            interface.  The interface identified by a particular
            value of this index is the same  interface
            as  identified by the same value an ifIndex
            object instance. If no interface is currently using
            a channel, the value should be zero.  If a
            single interface occupies more  than  one  time
            slot,  that ifIndex value will be found in multiple
            time slots."
        ::= { dsx1FracEntry 3 }

      -- Ds1 TRAPS

     ds1Traps OBJECT IDENTIFIER ::= { ds1 15 }

     dsx1LineStatusChange NOTIFICATION-TYPE
         OBJECTS { dsx1LineStatus,
                   dsx1LineStatusLastChange }
         STATUS  current
         DESCRIPTION
                 "A dsx1LineStatusChange trap is sent when the
                 value of an instance dsx1LineStatus changes. It
                 can be utilized by an NMS to trigger polls.  When
                 the line status change results from a higher level
                 line status change (i.e. ds3), then no traps for
                 the ds1 are sent."
          ::= { ds1Traps 0 1 }

     -- conformance information
     ds1Conformance OBJECT IDENTIFIER ::= { ds1 14 }

     ds1Groups      OBJECT IDENTIFIER ::= { ds1Conformance 1 }
     ds1Compliances OBJECT IDENTIFIER ::= { ds1Conformance 2 }

     -- compliance statements

     ds1Compliance MODULE-COMPLIANCE
         STATUS  current
         DESCRIPTION
                 "The compliance statement for T1 and E1
                 interfaces."
         MODULE  -- this module
             MANDATORY-GROUPS { ds1NearEndConfigGroup,
                                ds1NearEndStatisticsGroup }

             GROUP       ds1FarEndGroup
             DESCRIPTION
                 "Implementation of this group is optional for all
                 systems that attach to a DS1 Interface."

             GROUP       ds1NearEndOptionalConfigGroup
             DESCRIPTION
                 "Implementation of this group is optional for all
                 systems that attach to a DS1 Interface."

             GROUP       ds1DS2Group
             DESCRIPTION
                 "Implementation of this group is mandatory for all
                 systems that attach to a DS2 Interface."

             GROUP       ds1TransStatsGroup
             DESCRIPTION
                 "This group is the set of statistics appropriate
                 for all systems which attach to a DS1 Interface
                 running transparent or unFramed lineType."

             GROUP       ds1ChanMappingGroup
             DESCRIPTION
                 "This group is the set of objects for mapping a
                 DS3 Channel (ds1ChannelNumber) to ifIndex.

                 Implementation of this group is mandatory for
                 systems which support the channelization of DS3s
                 into DS1s."

             OBJECT dsx1LineType
             MIN-ACCESS read-only
             DESCRIPTION
                 "The ability to set the line type is not
                 required."

             OBJECT dsx1LineCoding
             MIN-ACCESS read-only
             DESCRIPTION
                 "The ability to set the line coding is not
                 required."

             OBJECT dsx1SendCode
             MIN-ACCESS read-only
             DESCRIPTION
                 "The ability to set the send code is not
                 required."

             OBJECT dsx1LoopbackConfig
             MIN-ACCESS read-only
             DESCRIPTION
                 "The ability to set loopbacks is not required."

             OBJECT dsx1SignalMode
             MIN-ACCESS read-only
             DESCRIPTION
                 "The ability to set the signal mode is not
                 required."

             OBJECT dsx1TransmitClockSource
             MIN-ACCESS read-only
             DESCRIPTION
                 "The ability to set the transmit clock source is

                 not required."

             OBJECT dsx1Fdl
             MIN-ACCESS read-only
             DESCRIPTION
                 "The ability to set the FDL is not required."

             OBJECT dsx1LineLength
             MIN-ACCESS read-only
             DESCRIPTION
                 "The ability to set the line length is not
                 required."

             OBJECT dsx1Channelization
             MIN-ACCESS read-only
             DESCRIPTION
                 "The ability to set the channelization is not
                 required."
         ::= { ds1Compliances 1 }

     ds1MibT1PriCompliance MODULE-COMPLIANCE
         STATUS current
         DESCRIPTION
                 "Compliance statement for using this MIB for ISDN
                 Primary Rate interfaces on T1 lines."
         MODULE
             MANDATORY-GROUPS { ds1NearEndConfigGroup,
                                ds1NearEndStatisticsGroup }
             OBJECT dsx1LineType
                 SYNTAX INTEGER {
                     dsx1ESF(2)   -- Intl Spec would be G704(2)
                                  -- or I.431(4)
                 }
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "Line type for T1 ISDN Primary Rate
                      interfaces."

             OBJECT dsx1LineCoding
                 SYNTAX INTEGER {
                     dsx1B8ZS(2)
                 }
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "Type of Zero Code Suppression for
                      T1 ISDN Primary Rate interfaces."

             OBJECT dsx1SignalMode
                 SYNTAX INTEGER {
                     none(1), -- if there is no signaling channel
                     messageOriented(4)
                 }
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "Possible signaling modes for
                      T1 ISDN Primary Rate interfaces."

             OBJECT dsx1TransmitClockSource
                 SYNTAX INTEGER {
                     loopTiming(1)
                 }
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "The transmit clock is derived from
                      received clock on ISDN Primary Rate
                      interfaces."

             OBJECT dsx1Fdl
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "Facilities Data Link usage on T1 ISDN
                      Primary Rate interfaces.
                      Note: Eventually dsx1Att-54016(4) is to be
                            used here since the line type is ESF."

             OBJECT dsx1Channelization
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "The ability to set the channelization
                      is not required."
         ::= { ds1Compliances 2 }

     ds1MibE1PriCompliance MODULE-COMPLIANCE
         STATUS current
         DESCRIPTION
                 "Compliance statement for using this MIB for ISDN
                 Primary Rate interfaces on E1 lines."
         MODULE
             MANDATORY-GROUPS { ds1NearEndConfigGroup,
                                ds1NearEndStatisticsGroup }
             OBJECT dsx1LineType
                 SYNTAX INTEGER {
                     dsx1E1CRC(5)
                 }
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "Line type for E1 ISDN Primary Rate
                      interfaces."

             OBJECT dsx1LineCoding
                 SYNTAX INTEGER {
                     dsx1HDB3(3)
                 }
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "Type of Zero Code Suppression for
                      E1 ISDN Primary Rate interfaces."

             OBJECT dsx1SignalMode
                 SYNTAX INTEGER {
                     messageOriented(4)
                 }
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "Signaling on E1 ISDN Primary Rate interfaces
                      is always message oriented."

             OBJECT dsx1TransmitClockSource
                 SYNTAX INTEGER {
                     loopTiming(1)
                 }
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "The transmit clock is derived from received
                      clock on ISDN Primary Rate interfaces."

             OBJECT dsx1Fdl
                 MIN-ACCESS read-only
                 DESCRIPTION
                     "Facilities Data Link usage on E1 ISDN
                      Primary Rate interfaces.
                      Note: There is a 'M-Channel' in E1,
                            using National Bit Sa4 (G704,
                            Table 4a). It is used to implement
                            management features between ET
                            and NT.  This is different to
                            FDL in T1, which is used to carry
                            control signals and performance
                            data.  In E1, control and status
                            signals are carried using National
                            Bits Sa5, Sa6 and A (RAI Ind.).
                      This indicates that only the other(1) or
                      eventually the dsx1Fdl-none(8) bits should

                      be set in this object for E1 PRI."

             OBJECT dsx1Channelization
                 MIN-ACCESS read-only
                 DESCRIPTION
                 "The ability to set the channelization is not
                 required."
         ::= { ds1Compliances 3 }

     ds1Ds2Compliance MODULE-COMPLIANCE
         STATUS current
         DESCRIPTION
                 "Compliance statement for using this MIB for DS2
                 interfaces."
         MODULE
             MANDATORY-GROUPS { ds1DS2Group }

             OBJECT dsx1Channelization
                 MIN-ACCESS read-only
                 DESCRIPTION
                 "The ability to set the channelization is not
                 required."
         ::= { ds1Compliances 4 }

     -- units of conformance

     ds1NearEndConfigGroup  OBJECT-GROUP
         OBJECTS { dsx1LineIndex,
                   dsx1TimeElapsed,
                   dsx1ValidIntervals,
                   dsx1LineType,
                   dsx1LineCoding,
                   dsx1SendCode,
                   dsx1CircuitIdentifier,
                   dsx1LoopbackConfig,
                   dsx1LineStatus,
                   dsx1SignalMode,
                   dsx1TransmitClockSource,
                   dsx1Fdl,
                   dsx1InvalidIntervals,
                   dsx1LineLength,
                   dsx1LoopbackStatus,
                   dsx1Ds1ChannelNumber,
                   dsx1Channelization }
         STATUS  current
         DESCRIPTION
                 "A collection of objects providing configuration

                 information applicable to all DS1 interfaces."
         ::= { ds1Groups 1 }

     ds1NearEndStatisticsGroup OBJECT-GROUP
         OBJECTS { dsx1CurrentIndex,
                   dsx1CurrentESs,
                   dsx1CurrentSESs,
                   dsx1CurrentSEFSs,
                   dsx1CurrentUASs,
                   dsx1CurrentCSSs,
                   dsx1CurrentPCVs,
                   dsx1CurrentLESs,
                   dsx1CurrentBESs,
                   dsx1CurrentDMs,
                   dsx1CurrentLCVs,
                   dsx1IntervalIndex,
                   dsx1IntervalNumber,
                   dsx1IntervalESs,
                   dsx1IntervalSESs,
                   dsx1IntervalSEFSs,
                   dsx1IntervalUASs,
                   dsx1IntervalCSSs,
                   dsx1IntervalPCVs,
                   dsx1IntervalLESs,
                   dsx1IntervalBESs,
                   dsx1IntervalDMs,
                   dsx1IntervalLCVs,
                   dsx1IntervalValidData,
                   dsx1TotalIndex,
                   dsx1TotalESs,
                   dsx1TotalSESs,
                   dsx1TotalSEFSs,
                   dsx1TotalUASs,
                   dsx1TotalCSSs,
                   dsx1TotalPCVs,
                   dsx1TotalLESs,
                   dsx1TotalBESs,
                   dsx1TotalDMs,
                   dsx1TotalLCVs }
         STATUS  current
         DESCRIPTION
                 "A collection of objects providing statistics
                 information applicable to all DS1 interfaces."
         ::= { ds1Groups 2 }

     ds1FarEndGroup  OBJECT-GROUP
         OBJECTS { dsx1FarEndCurrentIndex,
                   dsx1FarEndTimeElapsed,
                   dsx1FarEndValidIntervals,
                   dsx1FarEndCurrentESs,
                   dsx1FarEndCurrentSESs,
                   dsx1FarEndCurrentSEFSs,
                   dsx1FarEndCurrentUASs,
                   dsx1FarEndCurrentCSSs,
                   dsx1FarEndCurrentLESs,
                   dsx1FarEndCurrentPCVs,
                   dsx1FarEndCurrentBESs,
                   dsx1FarEndCurrentDMs,
                   dsx1FarEndInvalidIntervals,
                   dsx1FarEndIntervalIndex,
                   dsx1FarEndIntervalNumber,
                   dsx1FarEndIntervalESs,
                   dsx1FarEndIntervalSESs,
                   dsx1FarEndIntervalSEFSs,
                   dsx1FarEndIntervalUASs,
                   dsx1FarEndIntervalCSSs,
                   dsx1FarEndIntervalLESs,
                   dsx1FarEndIntervalPCVs,
                   dsx1FarEndIntervalBESs,
                   dsx1FarEndIntervalDMs,
                   dsx1FarEndIntervalValidData,
                   dsx1FarEndTotalIndex,
                   dsx1FarEndTotalESs,
                   dsx1FarEndTotalSESs,
                   dsx1FarEndTotalSEFSs,
                   dsx1FarEndTotalUASs,
                   dsx1FarEndTotalCSSs,
                   dsx1FarEndTotalLESs,
                   dsx1FarEndTotalPCVs,
                   dsx1FarEndTotalBESs,
                   dsx1FarEndTotalDMs }
         STATUS  current
         DESCRIPTION
                 "A collection of objects providing remote
                 configuration and statistics information."
         ::= { ds1Groups 3 }

     ds1DeprecatedGroup OBJECT-GROUP
         OBJECTS { dsx1IfIndex,
                   dsx1FracIndex,
                   dsx1FracNumber,
                   dsx1FracIfIndex }
         STATUS  deprecated
         DESCRIPTION
                 "A collection of obsolete objects that may be
                 implemented for backwards compatibility."
         ::= { ds1Groups 4 }

     ds1NearEndOptionalConfigGroup OBJECT-GROUP
         OBJECTS { dsx1LineStatusLastChange,
                   dsx1LineStatusChangeTrapEnable }
         STATUS    current
         DESCRIPTION
                 "A collection of objects that may be implemented
                 on DS1 and DS2 interfaces."
         ::= { ds1Groups 5 }

     ds1DS2Group OBJECT-GROUP
         OBJECTS { dsx1LineIndex,
                   dsx1LineType,
                   dsx1LineCoding,
                   dsx1SendCode,
                   dsx1LineStatus,
                   dsx1SignalMode,
                   dsx1TransmitClockSource,
                   dsx1Channelization }
         STATUS   current
         DESCRIPTION
                 "A collection of objects providing information
                 about DS2 (6,312 kbps) and E2 (8,448 kbps)
                 systems."
         ::= { ds1Groups 6 }

     ds1TransStatsGroup OBJECT-GROUP
         OBJECTS { dsx1CurrentESs,
                   dsx1CurrentSESs,
                   dsx1CurrentUASs,
                   dsx1IntervalESs,
                   dsx1IntervalSESs,
                   dsx1IntervalUASs,
                   dsx1TotalESs,
                   dsx1TotalSESs,
                   dsx1TotalUASs }
         STATUS   current
         DESCRIPTION
                      "A collection of objects which are the
                 statistics which can be collected from a ds1
                 interface that is running transparent or unframed
                 lineType.  Statistics not in this list should
                 return noSuchInstance."
         ::= { ds1Groups 7 }

     ds1NearEndOptionalTrapGroup NOTIFICATION-GROUP

         NOTIFICATIONS { dsx1LineStatusChange }
         STATUS    current
         DESCRIPTION
                 "A collection of notifications that may be
                 implemented on DS1 and DS2 interfaces."
         ::= { ds1Groups 8 }

     ds1ChanMappingGroup OBJECT-GROUP
         OBJECTS { dsx1ChanMappedIfIndex }
         STATUS    current
         DESCRIPTION
                 "A collection of objects that give an mapping of
                 DS3 Channel (ds1ChannelNumber) to ifIndex."
         ::= { ds1Groups 9 }

     END
