rfc2495.txt

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                 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



Fowler, Ed.                 Standards Track                    [Page 24]

RFC 2495                   DS1/E1/DS2/E2 MIB                January 1999


                 "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



Fowler, Ed.                 Standards Track                    [Page 25]

RFC 2495                   DS1/E1/DS2/E2 MIB                January 1999


                 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



Fowler, Ed.                 Standards Track                    [Page 26]

RFC 2495                   DS1/E1/DS2/E2 MIB                January 1999


                 "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),



Fowler, Ed.                 Standards Track                    [Page 27]

RFC 2495                   DS1/E1/DS2/E2 MIB                January 1999


                      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



Fowler, Ed.                 Standards Track                    [Page 28]

RFC 2495                   DS1/E1/DS2/E2 MIB                January 1999


                 "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



Fowler, Ed.                 Standards Track                    [Page 29]

RFC 2495                   DS1/E1/DS2/E2 MIB                January 1999


            "'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 cha