rfc1406.txt

著名的RFC文档,其中有一些文档是已经翻译成中文的的.

          vendor, and is useful when communicating with the vendor
          during the troubleshooting process.



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RFC 1406                       DS1/E1 MIB                   January 1993


4.  Definitions

     RFC1406-MIB DEFINITIONS ::= BEGIN
     IMPORTS
             Gauge
                     FROM RFC1155-SMI
             transmission, DisplayString
                     FROM RFC1213-MIB
             OBJECT-TYPE
                     FROM RFC-1212;

     --  This MIB module uses the extended OBJECT-TYPE macro as
     --  defined in RFC 1212.

     --  this is the MIB module for the DS1 objects

     ds1 OBJECT IDENTIFIER ::= { transmission 18 }

     -- note that this subsumes cept (19); there is no separate CEPT MIB


     -- The DS1 Near End Group

     -- Implementation of this group is mandatory for all systems
     -- that attach to a DS1 Interface.

     -- The DS1 Near End Group consists of four tables:
     --    DS1 Configuration
     --    DS1 Current
     --    DS1 Interval
     --    DS1 Total

     -- the DS1 Configuration Table

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


         dsx1ConfigEntry OBJECT-TYPE
             SYNTAX  Dsx1ConfigEntry
             ACCESS  not-accessible
             STATUS  mandatory
             DESCRIPTION



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RFC 1406                       DS1/E1 MIB                   January 1993


                "An entry in the DS1 Configuration table."
            INDEX   { dsx1LineIndex }
            ::= { dsx1ConfigTable 1 }

     Dsx1ConfigEntry ::=
         SEQUENCE {
             dsx1LineIndex
                 INTEGER,
             dsx1IfIndex
                 INTEGER,
             dsx1TimeElapsed
                 INTEGER,
             dsx1ValidIntervals
                 INTEGER,
             dsx1LineType
                 INTEGER,
             dsx1LineCoding
                 INTEGER,
             dsx1SendCode
                 INTEGER,
             dsx1CircuitIdentifier
                 DisplayString,
             dsx1LoopbackConfig
                 INTEGER,
             dsx1LineStatus
                 INTEGER,
             dsx1SignalMode
                 INTEGER,
             dsx1TransmitClockSource
                 INTEGER,
             dsx1Fdl
                 INTEGER
         }

         dsx1LineIndex OBJECT-TYPE
             SYNTAX  INTEGER (1..'7fffffff'h)
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                "This object is the identifier of a DS1  Inter-
                face on a managed device.  If there is an ifEn-
                try that is directly associated with  this  and
                only  this  DS1  interface,  it should have the
                same value as ifIndex.   Otherwise,  the  value
                exceeds  ifNumber,  and  is a unique identifier
                following this rule: inside  interfaces  (e.g.,
                equipment  side)  with even numbers and outside
                interfaces  (e.g.,  network   side)   with   odd



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RFC 1406                       DS1/E1 MIB                   January 1993


                numbers."
            ::= { dsx1ConfigEntry 1 }


         dsx1IfIndex OBJECT-TYPE
             SYNTAX  INTEGER (1..'7fffffff'h)
             ACCESS  read-only
             STATUS  mandatory
             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)
             ACCESS  read-only
             STATUS  mandatory
             DESCRIPTION
                "The number of seconds that have elapsed  since
                the  beginning of the current error-measurement
                period."
            ::= { dsx1ConfigEntry 3 }


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


         dsx1LineType OBJECT-TYPE
             SYNTAX  INTEGER {
                         other(1),
                         dsx1ESF(2),
                         dsx1D4(3),
                         dsx1E1(4),
                         dsx1E1-CRC(5),
                         dsx1E1-MF(6),



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RFC 1406                       DS1/E1 MIB                   January 1993


                         dsx1E1-CRC-MF(7)
                     }
             ACCESS  read-write
             STATUS  mandatory
             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
                dsx1D4        AT&T D4 format DS1
                dsx1E1        CCITT Recommendation G.704
                                (Table 4a)
                dsx1E1-CRC    CCITT 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"

                    ::= { dsx1ConfigEntry 5 }


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

                dsx1JBZS refers the Jammed  Bit  Zero  Suppres-
                sion,  in  which  the  AT&T specification of at
                least one pulse every 8 bit periods is literal-
                ly  implemented  by forcing a pulse in bit 8 of
                each channel.  Thus, only seven bits per  chan-



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RFC 1406                       DS1/E1 MIB                   January 1993


                nel, or 1.344 Mbps, is available for data.

                dsx1B8ZS refers to the use of a specified  pat-
                tern  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  re-
                quirements, such as inverting HDLC data."
            ::= { dsx1ConfigEntry 6 }


         dsx1SendCode OBJECT-TYPE
             SYNTAX  INTEGER {
                         dsx1SendNoCode(1),
                         dsx1SendLineCode(2),
                         dsx1SendPayloadCode(3),
                         dsx1SendResetCode(4),
                         dsx1SendQRS(5),
                         dsx1Send511Pattern(6),
                         dsx1Send3in24Pattern(7),
                         dsx1SendOtherTestPattern(8)
                     }
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                "This variable indicates what type of  code  is
                being sent across the DS1 interface by the dev-
                ice.  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



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RFC 1406                       DS1/E1 MIB                   January 1993


                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))
             ACCESS  read-write
             STATUS  mandatory
             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)
                     }
             ACCESS  read-write
             STATUS  mandatory
             DESCRIPTION
                "This variable represents the  loopback  confi-
                guration of the DS1 interface.  Agents support-
                ing read/write access should return badValue in
                response to a requested loopback state that the
                interface does not support.  The values mean:





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RFC 1406                       DS1/E1 MIB                   January 1993


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

                dsx1PayloadLoop
                     The received signal at this  interface  is
                     looped  through  the device. Typically the
                     received signal is  looped  back  for  re-
                     transmission  after  it has passed through
                     the device's framing function.

                dsx1LineLoop
                     The received signal at this interface does
                     not  go  through the device (minimum pene-