time where the proxy is not communicating with the DS1/E1
interfaces. In these instances the proxy will not necessarily
have up-to-date configuration information and will most likely
have missed the collection of some statistics data. Missed
statistics data collection will result in invalid data in the
interval table.
3. Object Definitions
DS1-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE,
NOTIFICATION-TYPE, transmission
FROM SNMPv2-SMI -- [RFC2578]
DisplayString, TimeStamp, TruthValue
FROM SNMPv2-TC -- [RFC2579]
MODULE-COMPLIANCE, OBJECT-GROUP,
NOTIFICATION-GROUP
FROM SNMPv2-CONF -- [RFC2580]
InterfaceIndex, ifIndex
FROM IF-MIB -- [RFC2863]
PerfCurrentCount, PerfIntervalCount,
PerfTotalCount
FROM PerfHist-TC-MIB; -- [RFC3593]
ds1 MODULE-IDENTITY
LAST-UPDATED "200409090000Z" -- September 09, 2004
ORGANIZATION "IETF AToM MIB Working Group"
CONTACT-INFO
"WG charter:
http://www.ietf.org/html.charters/atommib-charter.html
Mailing Lists:
General Discussion: atommib@research.telcordia.com
To Subscribe: atommib-request@research.telcordia.com
Editor: Orly Nicklass
Postal: RAD Data Communications, Ltd.
Ziv Tower, 24 Roul Walenberg
Tel Aviv, Israel, 69719
Tel: +9723 765 9969
E-mail: orly_n@rad.com"
DESCRIPTION
"The MIB module to describe DS1, E1, DS2, and
E2 interfaces objects.
Copyright (c) The Internet Society (2004). This
version of this MIB module is part of RFC 3895;
see the RFC itself for full legal notices."
REVISION "200409090000Z" -- September 09, 2004
DESCRIPTION
"The RFC 3895 version of this MIB module.
The key changes made to this MIB module
since its publication in RFC 2495 are as follows:
(1) The dsx1FracIfIndex SYNTAX matches the description range.
(2) A value was added to dsx1TransmitClockSource.
(3) Values were added to dsx1LineType.
(4) Two objects were added, dsx1LineMode and dsx1LineBuildOut
to better express transceiver mode and LineBuildOut for T1.
(5) Reference was added to Circuit Identifier object.
(6) Align the DESCRIPTION clauses of few statistic objects with
the near end definition, the far end definition and with
RFC 3593.
(7) Changes in Compliance Statements to include new objects.
(8) A typographical error in dsx2E2 was fixed, new name is dsx1E2."
REVISION "199808011830Z"
DESCRIPTION
"The RFC 2495 version of this MIB module.
The key changes made to this MIB module
since its publication in RFC 1406 are as follows:
(1) The Fractional Table has been deprecated.
(2) This document uses SMIv2.
(3) Usage is given for ifTable and ifXTable.
(4) Example usage of ifStackTable is included.
(5) dsx1IfIndex has been deprecated.
(6) Support for DS2 and E2 have been added.
(7) Additional lineTypes for DS2, E2, and unframed E1
were added.
(8) The definition of valid intervals has been clarified
for the case where the agent proxied for other devices. In
particular, the treatment of missing intervals has been
clarified.
(9) An inward loopback has been added.
(10) Additional lineStatus bits have been added for Near End in
Unavailable Signal State, Carrier Equipment Out of Service,
DS2 Payload AIS, and DS2 Performance Threshold.
(11) A read-write line Length object has been added.
(12) Signal mode of other has been added.
(13) Added a lineStatus last change, trap and enabler.
(14) The e1(19) ifType has been obsoleted so this MIB
does not list it as a supported ifType.
(15) Textual Conventions for statistics objects have been used.
(16) A new object, dsx1LoopbackStatus has been introduced to
reflect the loopbacks established on a DS1 interface and
the source to the requests. dsx1LoopbackConfig continues
to be the desired loopback state while dsx1LoopbackStatus
reflects the actual state.
(17) A dual loopback has been added to allow the setting of an
inward loopback and a line loopback at the same time.
(18) An object indicating which channel to use within a parent
object (i.e., DS3) has been added.
(19) An object has been added to indicate whether or not this
DS1/E1 is channelized.
(20) Line coding type of B6ZS has been added for DS2"
REVISION "199301252028Z"
DESCRIPTION
"Initial version, published as RFC 1406."
::= { transmission 18 }
-- note that this subsumes cept (19) and g703at2mb (67)
-- there is no separate CEPT or G703AT2MB MIB
-- The DS1 Near End Group
-- The DS1 Near End Group consists of five tables:
-- DS1 Configuration
-- DS1 Current
-- DS1 Interval
-- DS1 Total
-- DS1 Channel Table
-- The DS1 Configuration Table
dsx1ConfigTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1ConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The DS1 Configuration table."
::= { ds1 6 }
dsx1ConfigEntry OBJECT-TYPE
SYNTAX Dsx1ConfigEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in the DS1 Configuration table."
INDEX { dsx1LineIndex }
::= { dsx1ConfigTable 1 }
Dsx1ConfigEntry ::=
SEQUENCE {
dsx1LineIndex InterfaceIndex,
dsx1IfIndex InterfaceIndex,
dsx1TimeElapsed INTEGER,
dsx1ValidIntervals INTEGER,
dsx1LineType INTEGER,
dsx1LineCoding INTEGER,
dsx1SendCode INTEGER,
dsx1CircuitIdentifier DisplayString,
dsx1LoopbackConfig INTEGER,
dsx1LineStatus INTEGER,
dsx1SignalMode INTEGER,
dsx1TransmitClockSource INTEGER,
dsx1Fdl INTEGER,
dsx1InvalidIntervals INTEGER,
dsx1LineLength INTEGER,
dsx1LineStatusLastChange TimeStamp,
dsx1LineStatusChangeTrapEnable INTEGER,
dsx1LoopbackStatus INTEGER,
dsx1Ds1ChannelNumber INTEGER,
dsx1Channelization INTEGER,
dsx1LineMode INTEGER,
dsx1LineBuildOut INTEGER
}
dsx1LineIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-only -- read-only since originally an
-- SMIv1 index
STATUS current
DESCRIPTION
"This object should be made equal to ifIndex. The
next paragraph describes its previous usage.
Making the object equal to ifIndex allows proper
use of 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),
dsx1E2(11),
dsx1E1Q50(12),
dsx1E1Q50CRC(13)
}
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)
dsx1E1Q50 TS16 bits 5,7,8 set to 101, [in
all other cases it is set
to 111.](ITU-T G.704,table 14)
dsx1E1Q50CRC E1Q50 with CRC.
For clarification, the capacity for each E1 type
is as listed below:
dsx1E1Unframed - E1, no framing = 32 x 64k = 2048k
dsx1E1 or dsx1E1CRC - E1, with framing,
no signalling = 31 x 64k = 1984k
dsx1E1MF or dsx1E1CRCMF - E1, with framing,
signalling = 30 x 64k = 1920k"
REFERENCE
"American National Standard for telecommunications -
digital hierarchy - formats specification,
ANSI-T1.107 - 1988.
CCITT Specifications Volume III, Recommendation
G.703, Physical/Electrical Characteristics
of Hierarchical Digital Interfaces, April 1991.
ITU-T-G.704: Synchronous frame structures used at
1544, 6312, 2048, 8488 and 44 736 kbit/s
Hierarchical Levels, July 1995."
::= { 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 specified 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."
REFERENCE "ITU-T M.1400"
::= { dsx1ConfigEntry 8 }
dsx1LoopbackConfig OBJECT-TYPE
SYNTAX INTEGER {
dsx1NoLoop(1),
dsx1PayloadLoop(2),
dsx1LineLoop(3),
dsx1OtherLoop(4),
dsx1InwardLoop(5),
dsx1DualLoop(6)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This variable represents the desired loopback
configuration of the DS1 interface. Agents
supporting read/write access should return
inconsistentValue in response to a requested
loopback state that the interface does not
support. The values mean:
dsx1NoLoop
Not in the loopback state. A device that is not
capable of performing a loopback on the interface
shall always return this as its value.
dsx1PayloadLoop
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