tech-invite   World Map
3GPP     Specs     Glossaries     UICC       IETF     RFCs     Groups     SIP     ABNFs       T+       Search     Home

RFC 2496

 
 
 

Definitions of Managed Object for the DS3/E3 Interface Type

Part 2 of 2, p. 30 to 60
Prev RFC Part

 


prevText      Top      Up      ToC       Page 30 
     dsx3IntervalSEFSs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of
                 Severely Errored Framing Seconds."
          ::= { dsx3IntervalEntry 5 }

     dsx3IntervalUASs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of
                 Unavailable Seconds.  This object may decrease if
                 the occurance of unavailable seconds occurs across
                 an inteval boundary."
          ::= { dsx3IntervalEntry 6 }

     dsx3IntervalLCVs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of Line
                 Coding Violations."
          ::= { dsx3IntervalEntry 7 }

     dsx3IntervalPCVs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of P-bit
                 Coding Violations."
          ::= { dsx3IntervalEntry 8 }

     dsx3IntervalLESs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Line Errored  Seconds  (BPVs  or
                 illegal  zero  sequences)."
          ::= { dsx3IntervalEntry 9 }

     dsx3IntervalCCVs OBJECT-TYPE

Top      Up      ToC       Page 31 
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of C-bit Coding Violations."
          ::= { dsx3IntervalEntry 10 }

     dsx3IntervalCESs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of C-bit Errored Seconds."
          ::= { dsx3IntervalEntry 11 }

     dsx3IntervalCSESs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of C-bit Severely Errored Seconds."
          ::= { dsx3IntervalEntry 12 }

     dsx3IntervalValidData OBJECT-TYPE
          SYNTAX  TruthValue
          MAX-ACCESS read-only
          STATUS current
          DESCRIPTION
                 "This variable indicates if the data for this
                 interval is valid."
          ::= { dsx3IntervalEntry 13 }

     -- the DS3/E3 Total

     dsx3TotalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF Dsx3TotalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "The DS3/E3 Total Table contains the cumulative
                 sum of the various statistics for the 24 hour
                 period preceding the current interval."
          ::= { ds3 8 }

     dsx3TotalEntry OBJECT-TYPE
          SYNTAX  Dsx3TotalEntry
          MAX-ACCESS  not-accessible
          STATUS  current

Top      Up      ToC       Page 32 
          DESCRIPTION
                 "An entry in the DS3/E3 Total table."
         INDEX   { dsx3TotalIndex }
          ::= { dsx3TotalTable 1 }

     Dsx3TotalEntry ::=
          SEQUENCE {
              dsx3TotalIndex      InterfaceIndex,
              dsx3TotalPESs       PerfTotalCount,
              dsx3TotalPSESs      PerfTotalCount,
              dsx3TotalSEFSs      PerfTotalCount,
              dsx3TotalUASs       PerfTotalCount,
              dsx3TotalLCVs       PerfTotalCount,
              dsx3TotalPCVs       PerfTotalCount,
              dsx3TotalLESs       PerfTotalCount,
              dsx3TotalCCVs       PerfTotalCount,
              dsx3TotalCESs       PerfTotalCount,
              dsx3TotalCSESs      PerfTotalCount
          }

     dsx3TotalIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which uniquely identifies the
                 DS3/E3 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
                 dsx3LineIndex object instance."
          ::= { dsx3TotalEntry 1 }

     dsx3TotalPESs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of P-bit
                 Errored Seconds, encountered by a DS3 interface in
                 the previous 24 hour interval. Invalid 15 minute
                 intervals count as 0."
          ::= { dsx3TotalEntry 2 }

     dsx3TotalPSESs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current

Top      Up      ToC       Page 33 
          DESCRIPTION
                 "The counter associated with the number of P-bit
                 Severely Errored Seconds, encountered by a DS3
                 interface in the previous 24 hour interval.
                 Invalid 15 minute intervals count as 0."
          ::= { dsx3TotalEntry 3 }

     dsx3TotalSEFSs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of
                 Severely Errored Framing Seconds, encountered by a
                 DS3/E3 interface in the previous 24 hour interval.
                 Invalid 15 minute intervals count as 0."
          ::= { dsx3TotalEntry 4 }

     dsx3TotalUASs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of
                 Unavailable Seconds, encountered by a DS3
                 interface in the previous 24 hour interval.

                 Invalid 15 minute intervals count as 0."
          ::= { dsx3TotalEntry 5 }

     dsx3TotalLCVs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of Line
                 Coding Violations encountered by a DS3/E3
                 interface in the previous 24 hour interval.
                 Invalid 15 minute intervals count as 0."
          ::= { dsx3TotalEntry 6 }

     dsx3TotalPCVs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of P-bit
                 Coding Violations, encountered by a DS3 interface

Top      Up      ToC       Page 34 
                 in the previous 24 hour interval. Invalid 15
                 minute intervals count as 0."
          ::= { dsx3TotalEntry 7 }

     dsx3TotalLESs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of Line Errored  Seconds  (BPVs  or
                 illegal  zero  sequences) encountered by a DS3/E3
                 interface in the previous 24 hour interval.
                 Invalid 15 minute intervals count as 0."
          ::= { dsx3TotalEntry 8 }

     dsx3TotalCCVs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of C-bit Coding Violations encountered
                 by a DS3 interface in the previous 24 hour
                 interval. Invalid 15 minute intervals count as 0."
          ::= { dsx3TotalEntry 9 }

     dsx3TotalCESs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of C-bit Errored Seconds encountered
                 by a DS3 interface in the previous 24 hour
                 interval. Invalid 15 minute intervals count as 0."
          ::= { dsx3TotalEntry 10 }

     dsx3TotalCSESs OBJECT-TYPE
          SYNTAX  PerfTotalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of C-bit Severely Errored Seconds
                 encountered by a DS3 interface in the previous 24
                 hour interval. Invalid 15 minute intervals count
                 as 0."
          ::= { dsx3TotalEntry 11 }


     -- The DS3 Far End Group

Top      Up      ToC       Page 35 
     -- The DS3 Far End Group consists of four tables :
     --   DS3 Far End Configuration
     --   DS3 Far End Current
     --   DS3 Far End Interval
     --   DS3 Far End Total


     -- The DS3 Far End Configuration Table

     dsx3FarEndConfigTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF Dsx3FarEndConfigEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "The DS3 Far End Configuration Table contains
                 configuration information reported in the C-bits
                 from the remote end."
          ::= { ds3 9 }

     dsx3FarEndConfigEntry OBJECT-TYPE
          SYNTAX  Dsx3FarEndConfigEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "An entry in the DS3 Far End Configuration table."
         INDEX   { dsx3FarEndLineIndex }
          ::= { dsx3FarEndConfigTable 1 }

     Dsx3FarEndConfigEntry ::=
          SEQUENCE {
              dsx3FarEndLineIndex          InterfaceIndex,
             dsx3FarEndEquipCode           DisplayString,
             dsx3FarEndLocationIDCode      DisplayString,
             dsx3FarEndFrameIDCode         DisplayString,
             dsx3FarEndUnitCode            DisplayString,
             dsx3FarEndFacilityIDCode      DisplayString
          }

     dsx3FarEndLineIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which uniquely identifies the DS3
                 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 dsx3LineIndex object instance."

Top      Up      ToC       Page 36 
         ::= { dsx3FarEndConfigEntry 1 }

     dsx3FarEndEquipCode OBJECT-TYPE
          SYNTAX  DisplayString (SIZE (0..10))
          MAX-ACCESS  read-write
          STATUS  current
          DESCRIPTION
                 "This is the Far End Equipment Identification code
                 that describes the specific piece of equipment.
                 It is sent within the Path Identification
                 Message."
          ::= { dsx3FarEndConfigEntry 2 }

     dsx3FarEndLocationIDCode OBJECT-TYPE
          SYNTAX  DisplayString (SIZE (0..11))
          MAX-ACCESS  read-write
          STATUS  current
          DESCRIPTION
                 "This is the Far End Location Identification code
                 that describes the specific location of the
                 equipment.  It is sent within the Path
                 Identification Message."
          ::= { dsx3FarEndConfigEntry 3 }

     dsx3FarEndFrameIDCode OBJECT-TYPE
          SYNTAX  DisplayString (SIZE (0..10))
          MAX-ACCESS  read-write
          STATUS  current
          DESCRIPTION
                 "This is the Far End Frame Identification code
                 that identifies where the equipment is located
                 within a building at a given location.  It is sent
                 within the Path Identification Message."
          ::= { dsx3FarEndConfigEntry 4 }

     dsx3FarEndUnitCode OBJECT-TYPE
          SYNTAX  DisplayString (SIZE (0..6))
          MAX-ACCESS  read-write
          STATUS  current
          DESCRIPTION
                 "This is the Far End code that identifies the
                 equipment location within a bay.  It is sent
                 within the Path Identification Message."
          ::= { dsx3FarEndConfigEntry 5 }

     dsx3FarEndFacilityIDCode OBJECT-TYPE
          SYNTAX  DisplayString (SIZE (0..38))
          MAX-ACCESS  read-write

Top      Up      ToC       Page 37 
          STATUS  current
          DESCRIPTION
                 "This code identifies a specific Far End DS3 path.
                 It is sent within the Path Identification
                 Message."
          ::= { dsx3FarEndConfigEntry 6 }

     -- The DS3 Far End Current

     dsx3FarEndCurrentTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF Dsx3FarEndCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "The DS3 Far End Current table contains various
                 statistics being collected for the current 15
                 minute interval.  The statistics are collected
                 from the far end block error code within the C-
                 bits."
          ::= { ds3 10 }

     dsx3FarEndCurrentEntry OBJECT-TYPE
          SYNTAX  Dsx3FarEndCurrentEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "An entry in the DS3 Far End Current table."
          INDEX   { dsx3FarEndCurrentIndex }
          ::= { dsx3FarEndCurrentTable 1 }

     Dsx3FarEndCurrentEntry ::=
          SEQUENCE {
              dsx3FarEndCurrentIndex        InterfaceIndex,
              dsx3FarEndTimeElapsed         INTEGER,
              dsx3FarEndValidIntervals      INTEGER,
              dsx3FarEndCurrentCESs         PerfCurrentCount,
              dsx3FarEndCurrentCSESs        PerfCurrentCount,
              dsx3FarEndCurrentCCVs         PerfCurrentCount,
              dsx3FarEndCurrentUASs         PerfCurrentCount,
              dsx3FarEndInvalidIntervals    INTEGER
         }

      dsx3FarEndCurrentIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which uniquely identifies the DS3

Top      Up      ToC       Page 38 
                 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 dsx3LineIndex."
          ::= { dsx3FarEndCurrentEntry 1 }

     dsx3FarEndTimeElapsed 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."
          ::= { dsx3FarEndCurrentEntry 2 }

     dsx3FarEndValidIntervals 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."
          ::= { dsx3FarEndCurrentEntry 3 }

     dsx3FarEndCurrentCESs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of Far Far
                 End C-bit Errored Seconds."
          ::= { dsx3FarEndCurrentEntry 4 }

     dsx3FarEndCurrentCSESs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of Far End
                 C-bit Severely Errored Seconds."

Top      Up      ToC       Page 39 
          ::= { dsx3FarEndCurrentEntry 5 }

     dsx3FarEndCurrentCCVs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of Far End
                 C-bit Coding Violations reported via the far end
                 block error count."
          ::= { dsx3FarEndCurrentEntry 6 }

     dsx3FarEndCurrentUASs OBJECT-TYPE
          SYNTAX  PerfCurrentCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of Far End
                 unavailable seconds."
          ::= { dsx3FarEndCurrentEntry 7 }

     dsx3FarEndInvalidIntervals OBJECT-TYPE
          SYNTAX  INTEGER (0..96)
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The number of intervals in the range from 0 to
                 dsx3FarEndValidIntervals 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)."
          ::= { dsx3FarEndCurrentEntry 8 }

     -- The DS3 Far End Interval Table

     dsx3FarEndIntervalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF Dsx3FarEndIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "The DS3 Far End Interval Table contains various
                 statistics collected by each DS3 interface over
                 the previous 24 hours of operation.  The past 24
                 hours are broken into 96 completed 15 minute
                 intervals."
          ::= { ds3 11 }

     dsx3FarEndIntervalEntry OBJECT-TYPE

Top      Up      ToC       Page 40 
          SYNTAX  Dsx3FarEndIntervalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "An entry in the DS3 Far End Interval table."
          INDEX   { dsx3FarEndIntervalIndex,
                    dsx3FarEndIntervalNumber }
          ::= { dsx3FarEndIntervalTable 1 }

     Dsx3FarEndIntervalEntry ::=
          SEQUENCE {
               dsx3FarEndIntervalIndex      InterfaceIndex,
               dsx3FarEndIntervalNumber     INTEGER,
               dsx3FarEndIntervalCESs       PerfIntervalCount,
               dsx3FarEndIntervalCSESs      PerfIntervalCount,
               dsx3FarEndIntervalCCVs       PerfIntervalCount,
               dsx3FarEndIntervalUASs       PerfIntervalCount,
               dsx3FarEndIntervalValidData  TruthValue
         }

     dsx3FarEndIntervalIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which uniquely identifies the DS3
                 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 dsx3LineIndex."
          ::= { dsx3FarEndIntervalEntry 1 }

     dsx3FarEndIntervalNumber 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."
         ::= { dsx3FarEndIntervalEntry 2 }

     dsx3FarEndIntervalCESs OBJECT-TYPE
         SYNTAX  PerfIntervalCount
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION

Top      Up      ToC       Page 41 
                 "The counter associated with the number of Far End
                 C-bit Errored Seconds encountered by a DS3
                 interface in one of the previous 96, individual 15
                 minute, intervals. In the case where the agent is
                 a proxy and data is not available, return
                 noSuchInstance."
        ::= { dsx3FarEndIntervalEntry 3 }

     dsx3FarEndIntervalCSESs OBJECT-TYPE
         SYNTAX  PerfIntervalCount
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
                 "The counter associated with the number of Far End
                 C-bit Severely Errored Seconds."
        ::= { dsx3FarEndIntervalEntry 4 }

     dsx3FarEndIntervalCCVs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of Far End
                 C-bit Coding Violations reported via the far end
                 block error count."
          ::= { dsx3FarEndIntervalEntry 5 }

     dsx3FarEndIntervalUASs OBJECT-TYPE
          SYNTAX  PerfIntervalCount
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The counter associated with the number of Far End
                 unavailable seconds."
          ::= { dsx3FarEndIntervalEntry 6 }

     dsx3FarEndIntervalValidData OBJECT-TYPE
          SYNTAX  TruthValue
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "This variable indicates if the data for this
                 interval is valid."
          ::= { dsx3FarEndIntervalEntry 7 }


     -- The DS3 Far End Total

Top      Up      ToC       Page 42 
     dsx3FarEndTotalTable OBJECT-TYPE
          SYNTAX  SEQUENCE OF Dsx3FarEndTotalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "The DS3 Far End Total Table contains the
                 cumulative sum of the various statistics for the
                 24 hour period preceding the current interval."
          ::= { ds3 12 }

     dsx3FarEndTotalEntry OBJECT-TYPE
          SYNTAX  Dsx3FarEndTotalEntry
          MAX-ACCESS  not-accessible
          STATUS  current
          DESCRIPTION
                 "An entry in the DS3 Far End Total table."
          INDEX   { dsx3FarEndTotalIndex }
          ::= { dsx3FarEndTotalTable 1 }

     Dsx3FarEndTotalEntry ::=
          SEQUENCE {
              dsx3FarEndTotalIndex       InterfaceIndex,
              dsx3FarEndTotalCESs        PerfTotalCount,
              dsx3FarEndTotalCSESs       PerfTotalCount,
              dsx3FarEndTotalCCVs        PerfTotalCount,
              dsx3FarEndTotalUASs        PerfTotalCount
          }

     dsx3FarEndTotalIndex OBJECT-TYPE
          SYNTAX  InterfaceIndex
          MAX-ACCESS  read-only
          STATUS  current
          DESCRIPTION
                 "The index value which uniquely identifies the DS3
                 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 dsx3LineIndex."
          ::= { dsx3FarEndTotalEntry 1 }

     dsx3FarEndTotalCESs OBJECT-TYPE
         SYNTAX  PerfTotalCount
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
                 "The counter associated with the number of Far End
                 C-bit Errored Seconds encountered by a DS3
                 interface in the previous 24 hour interval.

Top      Up      ToC       Page 43 
                 Invalid 15 minute intervals count as 0."
         ::= { dsx3FarEndTotalEntry 2 }

     dsx3FarEndTotalCSESs OBJECT-TYPE
         SYNTAX  PerfTotalCount
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
                 "The counter associated with the number of Far End
                 C-bit Severely Errored Seconds encountered by a
                 DS3 interface in the previous 24 hour interval.
                 Invalid 15 minute intervals count as 0."
         ::= { dsx3FarEndTotalEntry 3 }

     dsx3FarEndTotalCCVs OBJECT-TYPE
         SYNTAX  PerfTotalCount
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
                 "The counter associated with the number of Far End
                 C-bit Coding Violations reported via the far end
                 block error count encountered by a DS3 interface
                 in the previous 24 hour interval. Invalid 15
                 minute intervals count as 0."
         ::= { dsx3FarEndTotalEntry 4 }

     dsx3FarEndTotalUASs OBJECT-TYPE
         SYNTAX  PerfTotalCount
         MAX-ACCESS  read-only
         STATUS  current
         DESCRIPTION
                 "The counter associated with the number of Far End
                 unavailable seconds encountered by a DS3 interface
                 in the previous 24 hour interval.  Invalid 15
                 minute intervals count as 0."
         ::= { dsx3FarEndTotalEntry 5 }


     -- the DS3/E3 Fractional Table

     -- This table is deprecated.

     dsx3FracTable OBJECT-TYPE
         SYNTAX  SEQUENCE OF Dsx3FracEntry
         MAX-ACCESS  not-accessible
         STATUS  deprecated
         DESCRIPTION
                 "This table is deprecated in favour of using

Top      Up      ToC       Page 44 
                 ifStackTable.

                 Implementation of this table was optional.  It was
                 designed for those systems dividing a DS3/E3 into
                 channels containing different data streams that
                 are of local interest.

                 The DS3/E3 fractional table identifies which
                 DS3/E3 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 a DS3 device with 4 high
                 speed links carrying router traffic, a feed for
                 voice, a feed for video, and a synchronous channel
                 for a non-routed protocol.  We might describe the
                 allocation of channels, in the dsx3FracTable, as
                 follows:
                 dsx3FracIfIndex.2. 1 = 3  dsx3FracIfIndex.2.15 = 4
                 dsx3FracIfIndex.2. 2 = 3  dsx3FracIfIndex.2.16 = 6
                 dsx3FracIfIndex.2. 3 = 3  dsx3FracIfIndex.2.17 = 6
                 dsx3FracIfIndex.2. 4 = 3  dsx3FracIfIndex.2.18 = 6
                 dsx3FracIfIndex.2. 5 = 3  dsx3FracIfIndex.2.19 = 6
                 dsx3FracIfIndex.2. 6 = 3  dsx3FracIfIndex.2.20 = 6
                 dsx3FracIfIndex.2. 7 = 4  dsx3FracIfIndex.2.21 = 6
                 dsx3FracIfIndex.2. 8 = 4  dsx3FracIfIndex.2.22 = 6
                 dsx3FracIfIndex.2. 9 = 4  dsx3FracIfIndex.2.23 = 6
                 dsx3FracIfIndex.2.10 = 4  dsx3FracIfIndex.2.24 = 6
                 dsx3FracIfIndex.2.11 = 4  dsx3FracIfIndex.2.25 = 6
                 dsx3FracIfIndex.2.12 = 5  dsx3FracIfIndex.2.26 = 6
                 dsx3FracIfIndex.2.13 = 5  dsx3FracIfIndex.2.27 = 6
                 dsx3FracIfIndex.2.14 = 5  dsx3FracIfIndex.2.28 = 6
                 For dsx3M23, dsx3 SYNTRAN, dsx3CbitParity, and
                 dsx3ClearChannel  there are 28 legal channels,
                 numbered 1 throug h 28.

                 For e3Framed there are 16 legal channels, numbered
                 1 through 16.  The channels (1..16) correspond
                 directly to the equivalently numbered time-slots."
          ::= { ds3 13 }

     dsx3FracEntry OBJECT-TYPE
          SYNTAX  Dsx3FracEntry
          MAX-ACCESS  not-accessible
          STATUS  deprecated
          DESCRIPTION
                         "An entry in the DS3 Fractional table."

Top      Up      ToC       Page 45 
         INDEX   { dsx3FracIndex, dsx3FracNumber }
         ::= { dsx3FracTable 1 }

     Dsx3FracEntry ::=
          SEQUENCE {
              dsx3FracIndex     INTEGER,
              dsx3FracNumber    INTEGER,
              dsx3FracIfIndex   INTEGER
         }


     dsx3FracIndex OBJECT-TYPE
         SYNTAX  INTEGER (1..'7fffffff'h)
         MAX-ACCESS  read-only
         STATUS  deprecated
         DESCRIPTION
                 "The index value which uniquely identifies  the
                 DS3  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  dsx3LineIndex
                 object instance."
        ::= { dsx3FracEntry 1 }

     dsx3FracNumber OBJECT-TYPE
         SYNTAX  INTEGER (1..31)
         MAX-ACCESS  read-only
         STATUS  deprecated
         DESCRIPTION
                 "The channel number for this entry."
        ::= { dsx3FracEntry 2 }

     dsx3FracIfIndex 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."
        ::= { dsx3FracEntry 3 }

Top      Up      ToC       Page 46 
      -- Ds3 TRAPS

     ds3Traps OBJECT IDENTIFIER ::= { ds3 15 }



     dsx3LineStatusChange NOTIFICATION-TYPE
         OBJECTS { dsx3LineStatus,
                   dsx3LineStatusLastChange }
         STATUS  current
         DESCRIPTION
                 "A dsx3LineStatusChange trap is sent when the
                 value of an instance of dsx3LineStatus changes. It
                 can be utilized by an NMS to trigger polls.  When
                 the line status change results in a lower level
                 line status change (i.e. ds1), then no traps for
                 the lower level are sent."
                    ::= { ds3Traps 0 1 }


                 -- conformance information

                 ds3Conformance OBJECT IDENTIFIER ::= { ds3 14 }

                 ds3Groups      OBJECT IDENTIFIER ::= {
                 ds3Conformance 1 } ds3Compliances OBJECT
                 IDENTIFIER ::= { ds3Conformance 2 }



                 -- compliance statements

                 ds3Compliance MODULE-COMPLIANCE
                     STATUS  current
                     DESCRIPTION
                             "The compliance statement for DS3/E3
                             interfaces."
         MODULE  -- this module
             MANDATORY-GROUPS { ds3NearEndConfigGroup,
                                ds3NearEndStatisticsGroup }

             GROUP       ds3FarEndGroup
             DESCRIPTION
                 "Implementation of this group is optional for all
                 systems that attach to a DS3 Interface.  However,
                 only C-bit Parity and SYNTRAN DS3 applications
                 have the capability (option) of providing this
                 information."

Top      Up      ToC       Page 47 
             GROUP       ds3NearEndOptionalConfigGroup
             DESCRIPTION
                 "Implementation of this group is optional for all
                 systems that attach to a DS3 interface."

             OBJECT      dsx3LineType
             MIN-ACCESS  read-only
             DESCRIPTION
                 "Write access for the line type is not required."

             OBJECT      dsx3LineCoding
             MIN-ACCESS  read-only
             DESCRIPTION
                 "Write access for the line coding is not
                 required."

             OBJECT      dsx3SendCode
             MIN-ACCESS  read-only
             DESCRIPTION
                 "Write access for the send code is not required."

             OBJECT      dsx3LoopbackConfig
             MIN-ACCESS  read-only
             DESCRIPTION
                 "Write access for loopbacks is not required."

             OBJECT      dsx3TransmitClockSource
             MIN-ACCESS  read-only
             DESCRIPTION
                 "Write access for the transmit clock source is not
                 required."

             OBJECT      dsx3LineLength
             MIN-ACCESS  read-only
             DESCRIPTION
                 "Write access for the line length is not
                 required."

             OBJECT      dsx3Channelization
             MIN-ACCESS  read-only
             DESCRIPTION
                 "Write access for the channelization is not
                 required."

         ::= { ds3Compliances 1 }

     -- units of conformance

Top      Up      ToC       Page 48 
     ds3NearEndConfigGroup  OBJECT-GROUP
         OBJECTS { dsx3LineIndex,
                   dsx3TimeElapsed,
                   dsx3ValidIntervals,
                   dsx3LineType,
                   dsx3LineCoding,
                   dsx3SendCode,
                   dsx3CircuitIdentifier,
                   dsx3LoopbackConfig,
                   dsx3LineStatus,
                   dsx3TransmitClockSource,
                   dsx3InvalidIntervals,
                   dsx3LineLength,
                   dsx3LoopbackStatus,
                   dsx3Channelization,
                   dsx3Ds1ForRemoteLoop }
         STATUS  current
         DESCRIPTION
                 "A collection of objects providing configuration
                 information applicable to all DS3/E3 interfaces."
         ::= { ds3Groups 1 }

     ds3NearEndStatisticsGroup OBJECT-GROUP
         OBJECTS { dsx3CurrentIndex,
                   dsx3CurrentPESs,
                   dsx3CurrentPSESs,
                   dsx3CurrentSEFSs,
                   dsx3CurrentUASs,
                   dsx3CurrentLCVs,
                   dsx3CurrentPCVs,
                   dsx3CurrentLESs,
                   dsx3CurrentCCVs,
                   dsx3CurrentCESs,
                   dsx3CurrentCSESs,
                   dsx3IntervalIndex,
                   dsx3IntervalNumber,
                   dsx3IntervalPESs,
                   dsx3IntervalPSESs,
                   dsx3IntervalSEFSs,
                   dsx3IntervalUASs,
                   dsx3IntervalLCVs,
                   dsx3IntervalPCVs,
                   dsx3IntervalLESs,
                   dsx3IntervalCCVs,
                   dsx3IntervalCESs,
                   dsx3IntervalCSESs,
                   dsx3IntervalValidData,
                   dsx3TotalIndex,

Top      Up      ToC       Page 49 
                   dsx3TotalPESs,
                   dsx3TotalPSESs,
                   dsx3TotalSEFSs,
                   dsx3TotalUASs,
                   dsx3TotalLCVs,
                   dsx3TotalPCVs,
                   dsx3TotalLESs,
                   dsx3TotalCCVs,
                   dsx3TotalCESs,
                   dsx3TotalCSESs }
         STATUS  current
         DESCRIPTION
                 "A collection of objects providing statistics
                 information applicable to all DS3/E3 interfaces."
         ::= { ds3Groups 2 }

     ds3FarEndGroup  OBJECT-GROUP
         OBJECTS { dsx3FarEndLineIndex,
                   dsx3FarEndEquipCode,
                   dsx3FarEndLocationIDCode,
                   dsx3FarEndFrameIDCode,
                   dsx3FarEndUnitCode,
                   dsx3FarEndFacilityIDCode,
                   dsx3FarEndCurrentIndex,
                   dsx3FarEndTimeElapsed,
                   dsx3FarEndValidIntervals,
                   dsx3FarEndCurrentCESs,
                   dsx3FarEndCurrentCSESs,
                   dsx3FarEndCurrentCCVs,
                   dsx3FarEndCurrentUASs,
                   dsx3FarEndInvalidIntervals,
                   dsx3FarEndIntervalIndex,
                   dsx3FarEndIntervalNumber,
                   dsx3FarEndIntervalCESs,
                   dsx3FarEndIntervalCSESs,
                   dsx3FarEndIntervalCCVs,
                   dsx3FarEndIntervalUASs,
                   dsx3FarEndIntervalValidData,
                   dsx3FarEndTotalIndex,
                   dsx3FarEndTotalCESs,
                   dsx3FarEndTotalCSESs,
                   dsx3FarEndTotalCCVs,
                   dsx3FarEndTotalUASs }
         STATUS  current
         DESCRIPTION
                 "A collection of objects providing remote
                 configuration and statistics information
                 applicable to C-bit Parity and SYNTRAN DS3

Top      Up      ToC       Page 50 
                 interfaces."
         ::= { ds3Groups 3 }

     ds3DeprecatedGroup OBJECT-GROUP
         OBJECTS { dsx3IfIndex,
                   dsx3FracIndex,
                   dsx3FracNumber,
                   dsx3FracIfIndex }
         STATUS  deprecated
         DESCRIPTION
                 "A collection of obsolete objects that may be
                 implemented for backwards compatibility."
         ::= { ds3Groups 4 }

     ds3NearEndOptionalConfigGroup OBJECT-GROUP
         OBJECTS { dsx3LineStatusLastChange,
                   dsx3LineStatusChangeTrapEnable }

         STATUS    current
         DESCRIPTION
                 "A collection of objects that may be implemented
                 on DS3/E3 interfaces."
         ::= { ds3Groups 5 }

     ds3NearEndOptionalTrapGroup NOTIFICATION-GROUP
         NOTIFICATIONS { dsx3LineStatusChange }
         STATUS    current
         DESCRIPTION
                 "A collection of notifications that may be
                 implemented on DS3/E3 interfaces."
         ::= { ds3Groups 6 }

     END

Top      Up      ToC       Page 51 
4.  Appendix A - Use of dsx3IfIndex and dsx3LineIndex

   This Appendix exists to document the previous use if dsx3IfIndex and
   dsx3LineIndex and to clarify the relationship of dsx3LineIndex as
   defined in rfc1407 with the dsx3LineIndex as defined in this
   document.

   The following shows the old and new definitions and the relationship:

   [New Definition]: "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.

   [Old Definition]: "this object is the identifier of a DS3/E3
   Interface on a managed device.  If there is an ifEntry that is
   directly associated with this and only this DS3/E3 interface, it
   should have the same value as ifIndex.  Otherwise, number the
   dsx3LineIndices 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."

   When the "Old Definition" was created, my understanding was that it
   was described this way to allow a manager to treat the value _as if_
   it were and ifIndex, i.e. the value would either be:  1) an ifIndex
   value or 2) a value that was guaranteed to be different from all
   valid ifIndex values.

   The new definition is a subset of that definition, i.e. the value is
   always an ifIndex value.

   The following is Section 3.1 from rfc1407:

   Different physical configurations for the support of SNMP with DS3/E3
   equipment exist. To accommodate these scenarios, two different
   indices for DS3/E3 interfaces are introduced in this MIB.  These
   indices are dsx3IfIndex and dsx3LineIndex.

   External interface scenario: the SNMP Agent represents all managed
   DS3/E3 lines as external interfaces (for example, an Agent residing
   on the device supporting DS3/E3 interfaces directly):

   For this scenario, all interfaces are assigned an integer value equal
   to ifIndex, and the following applies:

      ifIndex=dsx3IfIndex=dsx3LineIndex for all interfaces.

Top      Up      ToC       Page 52 
   The dsx3IfIndex column of the DS3/E3 Configuration table relates each
   DS3/E3 interface to its corresponding interface (ifIndex) in the
   Internet-standard MIB (MIB-II STD 17, RFC1213).

   External&Internal interface scenario: the SNMP Agents resides on an
   host external from the device supporting DS3/E3 interfaces (e.g., a
   router). The Agent represents both the host and the DS3/E3 device.
   The index dsx3LineIndex is used to not only represent the DS3/E3
   interfaces external from the host/DS3/E3-device combination, but also
   the DS3/E3 interfaces connecting the host and the DS3/E3 device.  The
   index dsx3IfIndex is always equal to ifIndex.

   Example:

   A shelf full of CSUs connected to a Router. An SNMP Agent residing on
   the router proxies for itself and the CSU. The router has also an
   Ethernet interface:

         +-----+
   |     |     |
   |     |     |               +---------------------+
   |E    |     |  44.736 MBPS  |   ds3 M13    Line#A | ds3 C-bit Parity
   |t    |  R  |---------------+ - - - - -  - - -  - +------>
   |h    |     |               |                     |
   |e    |  O  |  44.736 MBPS  |   ds3 M13    Line#B | ds3 C-bit Parity
   |r    |     |---------------+ - - - - - - - - - - +------>
   |n    |  U  |               |                     |
   |e    |     |  44.736 MBPS  |   ds3 M13    Line#C | ds3 C-bit Parity
   |t    |  T  |---------------+ - - - -- -- - - - - +------>
   |     |     |               |                     |
   |-----|  E  |  44.736 MBPS  |   ds3 M13    Line#D | ds3 C-bit Parity
   |     |     |---------------+ -  - - - -- - - - - +------>
   |     |  R  |               |_____________________|
   |     |     |
   |     +-----+

Top      Up      ToC       Page 53 
   The assignment of the index values could for example be:

           ifIndex (= dsx3IfIndex)                     dsx3LineIndex

                   1                   NA                  NA (Ethernet)
                   2      Line#A   Router Side             6
                   2      Line#A   Network Side            7
                   3      Line#B   Router Side             8
                   3      Line#B   Network Side            9
                   4      Line#C   Router Side            10
                   4      Line#C   Network Side           11
                   5      Line#D   Router Side            12
                   5      Line#D   Network Side           13

   For this example, ifNumber is equal to 5.  Note the following
   description of dsx3LineIndex:  the dsx3LineIndex identifies a DS3/E3
   Interface on a managed device.  If there is an ifEntry that is
   directly associated with this and only this DS3/E3 interface, it
   should have the same value as ifIndex.  Otherwise, number the
   dsx3LineIndices with an unique identifier following the rules of
   choosing a number greater than ifNumber and numbering inside
   interfaces (e.g., equipment side) with even numbers and outside
   interfaces (e.g, network side) with odd numbers.

   If the CSU shelf is managed by itself by a local SNMP Agent, the
   situation would be:

           ifIndex (= dsx3IfIndex)                      dsx3LineIndex

                   1      Line#A     Network Side            1
                   2      Line#A     RouterSide              2
                   3      Line#B     Network Side            3
                   4      Line#B     RouterSide              4
                   5      Line#C     Network Side            5
                   6      Line#C     Router Side             6
                   7      Line#D     Network Side            7
                   8      Line#D     Router Side             8

Top      Up      ToC       Page 54 
5.  Appendix B - The delay approach to Unavialable Seconds.

   This procedure is illustrated below for a DS3 C-Bit parity
   application.  Similar rules would apply for other interfaces covered
   by this MIB.  The procedure guarantees that the statistical counters
   are correctly updated at all times, although they lag real time by 10
   seconds.  At the end of each 15 minutes interval the current interval
   counts are transferred to the  most recent interval entry and each
   interval is shifted up by one position, with the oldest being
   discarded if necessary in order to make room.  The current interval
   counts then start over from zero.  Note, however, that the signal
   state calculation does not start afresh at each interval boundary;
   rather, signal state information is retained across interval
   boundaries.

   +----------------------------------------------------------------+
   |           READ COUNTERS & STATUS INFO FROM HARDWARE            |
   |                                                                |
   |BPV EXZ LOS     PCV CCV AIS SEF OOF LOF         FEBE  RAI       |
   +----------------------------------------------------------------+
     |   |   |       |   |   |   |   |   |            |    |
     |   |   |       |   |   |   |   |   |            |    |
     V   V   V       V   V   V   V   V   V            V    V
   +----------------------------------------------------------------+
   | ACCUM ONE-SEC STATS, CHK ERR THRESHOLDS, & UPDT SIGNAL STATE   |
   |                                                                |
   |<------------- NEAR END ---------------->| |<---- FAR END ----->|
   |                                                                |
   |LCV LES PCV CCV PES CES PSES CSES SEFS A/U CCV CES CSES SEFS A/U|
   +----------------------------------------------------------------+
     |   |   |   |   |   |    |    |    |   |   |   |    |    |   |
     |   |   |   |   |   |    |    |    |   |   |   |    |    |   |
     V   V   V   V   V   V    V    V    V   |   V   V    V    V   |
   +--------------------------------------+ | +-----------------+ |
   |            ONE-SEC DELAY             | | | ONE-SEC DELAY   | |
   |              (1 OF 10)               | | |   (1 OF 10)     | |
   +--------------------------------------+ | +-----------------+ |
     |   |   |   |   |   |    |    |    |   |   |   |    |    |   |
     /   /   /   /   /   /    /    /    /   /   /   /    /    /   /
     |   |   |   |   |   |    |    |    |   |   |   |    |    |   |
     V   V   V   V   V   V    V    V    V   |   V   V    V    V   |
   +--------------------------------------+ | +-----------------+ |
   |            ONE-SEC DELAY             | | | ONE-SEC DELAY   | |
   |             (10 OF 10)               | | |  (10 OF 10)     | |
   +--------------------------------------+ | +-----------------+ |
     |   |   |   |   |   |    |    |    |   |   |   |    |    |   |
     |   |   |   |   |   |    |    |    |   |   |   |    |    |   |
     V   V   V   V   V   V    V    V    V   V   V   V    V    V   V

Top      Up      ToC       Page 55 
   +----------------------------------------------------------------+
   |               UPDATE STATISTICS COUNTERS                       |
   |                                                                |
   |<------------- NEAR END ---------------->| |<---- FAR END ----->|
   |                                                                |
   |LCV LES PCV CCV PES CES PSES CSES SEFS UAS CCV CES CSES SEFS UAS|
   +----------------------------------------------------------------+

   Note that if such a procedure is adopted there is no current interval
   data for the first ten seconds after a system comes up.
   noSuchInstance must be returned if a management station attempts to
   access the current interval counters during this time.

   It is an implementation-specific matter whether an agent assumes that
   the initial state of the interface is available or unavailable.

Top      Up      ToC       Page 56 
6.  Intellectual Property

   The IETF takes no position regarding the validity or scope of any
   intellectual property or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; neither does it represent that it
   has made any effort to identify any such rights.  Information on the
   IETF's procedures with respect to rights in standards-track and
   standards-related documentation can be found in BCP-11.  Copies of
   claims of rights made available for publication and any assurances of
   licenses to be made available, or the result of an attempt made to
   obtain a general license or permission for the use of such
   proprietary rights by implementors or users of this specification can
   be obtained from the IETF Secretariat.

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights which may cover technology that may be required to practice
   this standard.  Please address the information to the IETF Executive
   Director.

7.  Acknowledgments

   This document was produced by the Trunk MIB Working Group

8.  References

   [1]  Harrington, D., Presuhn, R. and B. Wijnen, "An Architecture for
        Describing SNMP Management Frameworks", RFC 2271, January 1998.

   [2]  Rose, M. and K. McCloghrie, "Structure and Identification of
        Management Information for TCP/IP-based Internets", STD 16, RFC
        1155, May 1990.

   [3]  Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD 16,
        RFC 1212, March 1991.

   [4]  Rose, M., "A Convention for Defining Traps for use with the
        SNMP", RFC 1215, March 1991.

   [5]  Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Structure
        of Management Information for Version 2 of the Simple Network
        Management Protocol (SNMPv2)", RFC 1902, January 1996.

   [6]  Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Textual
        Conventions for Version 2 of the Simple Network Management
        Protocol (SNMPv2)", RFC 1903, January 1996.

Top      Up      ToC       Page 57 
   [7]  Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
        "Conformance Statements for Version 2 of the Simple Network
        Management Protocol (SNMPv2)", RFC 1904, January 1996.

   [8]  Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple
        Network Management Protocol", STD 15, RFC 1157, May 1990.

   [9]  Case, J., McCloghrie, K., Rose, M. and S. Waldbusser,
        "Introduction to Community-based SNMPv2", RFC 1901, January
        1996.

   [10] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Transport
        Mappings for Version 2 of the Simple Network Management Protocol
        (SNMPv2)", RFC 1906, January 1996.

   [11] Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message
        Processing and Dispatching for the Simple Network Management
        Protocol (SNMP)", RFC 2272, January 1998.

   [12] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM)
        for version 3 of the Simple Network Management Protocol
        (SNMPv3)", RFC 2274, January 1998.

   [13] Case, J., McCloghrie, K., Rose, M. and S. Waldbusser, "Protocol
        Operations for Version 2 of the Simple Network Management
        Protocol (SNMPv2)", RFC 1905, January 1996.

   [14] Levi, D., Meyer, P. and B. Stewart, "SNMPv3 Applications", RFC
        2273, January 1998.

   [15] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access
        Control Model (VACM) for the Simple Network Management Protocol
        (SNMP)", RFC 2275, January 1998.

   [16] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB
        using SMIv2", RFC 2233, November 1997.

   [17] Fowler D., "Definitions of Managed Objects for the DS1 and E1
        Interface Types", RFC 2495, January 1999.

   [18] Brown, T., and Tesink, K., "Definitions of Managed Objects for
        the SONET/SDH Interface Type", Work in Progress.

   [19] American National Standard for telecommunications - digital
        hierarchy - electrical interfaces, ANSI T1.102- 1987.

   [20] American National Standard for telecommunications - digital
        hierarchy - formats specification, ANSI T1.107- 1988.

Top      Up      ToC       Page 58 
   [20a]ANSI T1.107a-1990.

   [21] American National Standard for telecommunications - Carrier-to-
        Customer Installation - DS3 Metallic Interface, ANSI T1.404-
        1989.

   [22] American National Standard for Telecommunications -- Layer 1 In-
        Service Digital Transmission Performance Monitoring T1.231, Sept
        1993.

   [23] CCITT - Digital Multiplex Equipment Operating at the Third Order
        Bit Rate of 34 368 Kbit/s and the Forth Order Bit Rate of 139
        264 Kbit/s and Using Positive Justification, G.751

   [24] European Telecommunications Standards Institute -- ETS "34M" --
        Metropolitan Area Network Physical Convergence Layer Procedure
        for 34.368 Megabits per Second, T/NA(91)18, May 1991.

   [25] Fowler, D., "Definitions of Managed Objects for the Ds0 and
        DS0Bundle Interface Types", RFC 2494, January 1999.

   [26] Tesink, K., "Textual Conventions for MIB Modules Using
        Performance History Based on 15 Minute Intervals", RFC 2493,
        January 1999.

9.  Security Considerations

   SNMPv1 by itself is such an insecure environment.  Even if the
   network itself is secure (for example by using IPSec), even then,
   there is no control as to who on the secure network is allowed to
   access and GET (read) the objects in this MIB.

   It is recommended that the implementors consider the security
   features as provided by the SNMPv3 framework.  Specifically, the use
   of the User-based Security Model RFC 2274 [12] and the View-based
   Access Control Model RFC 2275 [15] is recommended.

   It is then a customer/user responsibility to ensure that the SNMP
   entity giving access to an instance of this MIB, is properly
   configured to give access to those objects only to those principals
   (users) that have legitimate rights to access them.

   Setting any of the following objects to an inappropriate value can
   cause loss of traffic.  The definition of inappropriate varies for
   each object.  In the case of dsx3LineType, for example, both ends of
   a ds3/e3 must have the same value in order for traffic to flow.  In
   the case of dsx3SendCode and dsx3LoopbackConfig, for another example,
   traffic may stop transmitting when particular loopbacks are applied.

Top      Up      ToC       Page 59 
      dsx3LineType
      dsx3LineCoding
      dsx3SendCode
      dsx3LoopbackConfig
      dsx3TransmitClockSource
      dsx3LineLength
      dsx3Channelization

   Setting the following object is mischevious, but not harmful to
   traffic
      dsx3CircuitIdentifier

   Setting the following object can cause an increase in the number of
   traps received by the network management station.
      dsx3LineStatusChangeTrabEnable

10.  Author's Address

   David Fowler
   Newbridge Networks
   600 March Road
   Kanata, Ontario, Canada K2K 2E6

   Phone: (613) 599-3600, ext 6559
   EMail: davef@newbridge.com

Top      Up      ToC       Page 60 
11.  Full Copyright Statement

   Copyright (C) The Internet Society (1999).  All Rights Reserved.

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph are
   included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than
   English.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an
   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.