DS1
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... These objects are used when the particular media being used to
realize an interface is a DS1/J1/E1/DS2 ...
...
ifTable Object Use for DS1 Layer
===================================================================
...
... ifConnectorPresent Set to true(1) normally, except for
cases such as DS1/E1 over AAL1/ATM where
false(2) is appropriate.
...
... SNMP agent resides on a
host external from the device supporting DS1 interfaces (e.g., a
router ...
... | | | +---------------------+
|E | | 1.544 MBPS | Line#A | DS1 Link
|t | R |---------------+ - - - - - - - - - +------>
...
... |h | | | |
|e | O | 1.544 MBPS | Line#B | DS1 Link
|r | |---------------+ - - - - - - - - - - +------>
...
... CSU Shelf |
|e | | 1.544 MBPS | Line#C | DS1 Link
|t | T |---------------+ - - - -- -- - - - - +------>
...
... | | | | |
|-----| E | 1.544 MBPS | Line#D | DS1 Link
| | |---------------+ - - - - -- - - - - +------>
...
... An example is given here to explain the channelization objects in the
DS3, DS1, and DS0 MIBs to help the implementer use the objects
...
... Assume that a DS3 (with ifIndex 1) is channelized into DS1s (without
DS2s). The object dsx3Channelization is set to enabledDs1. There
...
... DS2s). The object dsx3Channelization is set to enabledDs1. There
will be 28 DS1s in the ifTable. Assume the entries in the ifTable
...
... ifTable. Assume the entries in the ifTable
for the DS1s are created in channel order and the ifIndex ...
... channel order and the ifIndex values are
2 through 29. In the DS1 MIB, there will be an entry in the
dsx1ChanMappingTable for each DS1 ...
... DS1 MIB, there will be an entry in the
dsx1ChanMappingTable for each DS1. The entries will be as follows:
dsx1ChanMappingTable Entries
...
... 1 28 29
In addition, the DS1s are channelized into DS0s. The object
dsx1Channelization is set to enabledDS0 for each DS1 ...
... DS1s are channelized into DS0s. The object
dsx1Channelization is set to enabledDS0 for each DS1. When this
object is set to this value, 24 DS0s are created by the agent ...
... agent. There
will be 24 DS0s in the ifTable for each DS1. If the
dsx1Channelization is set to disabled, the 24 DS0s are destroyed.
...
... channel order and
the ifIndex values for the DS0s in the first DS1 are 30 through 53.
In the DS0 MIB, there will be an entry in the dsx0ChanMappingTable
...
... An example is given here to explain the channelization objects in the
DS3 and DS1 MIBs to help the implementer use the objects correctly.
...
... RFC3896] is set to enabledDs2. There will
be 7 DS2s (ifType of DS1) in the ifTable. Assume the entries in the
ifTable ...
... channel order and the ifIndex
values are 2 through 8. In the DS1 MIB, there will be an entry in
the dsx1ChanMappingTable for each DS2 ...
... 1 7 8
In addition, the DS2s are channelized into DS1s. The object
dsx1Channelization is set to enabledDS1 for each DS2 ...
... dsx1Channelization is set to enabledDS1 for each DS2. There will be
4 DS1s in the ifTable for each DS2. Assume the entries in the
...
... channel order and the ifIndex values for the
DS1s in the first DS2 are 9 through 12, then 13 through 16 for the
second DS2 ...
... DS2 are 9 through 12, then 13 through 16 for the
second DS2, and so on. In the DS1 MIB, there will be an entry in the
dsx1ChanMappingTable for each DS1 ...
... DS1 MIB, there will be an entry in the
dsx1ChanMappingTable for each DS1. The entries will be as follows:
dsx1ChanMappingTable Entries
...
...
To model the current state of loopbacks on a DS1 interface, the
object dsx1LoopbackStatus defines which loopback ...
...
There are numerous things that could be included in a MIB for DS1
signals: the management of multiplexers, CSUs ...
... DSUs), and the like. The intent of this document is to facilitate
the common management of all devices with DS1, J1, E1, DS2 ...
... DS1 Terminology ...
... The terminology used in this document to describe error conditions on
a DS1 interface as monitored by a DS1 device are based on the latest
...
... payload
bits of a DS1 frame (see T1.231, Section 4.2.1.2.3). A Controlled
Slip may be performed when there is a difference between the
...
... ESF links, the 'all ones' condition is detected at a
DS1 line interface upon observing an unframed signal with a one's
density of at least 99.9% present for a time equal to or greater
...
... the onset of the condition leading to a failure (see Failure
States). If the condition leading to the failure was immediately
preceded by one or more contiguous SESs, then the DS1 interface
unavailability starts ...
... starts from the onset of these SESs. Once
unavailable, and if no failure is present, the DS1 interface
becomes available at the onset of 10 contiguous seconds with no
...
... becomes available at the onset of 10 contiguous seconds with no
SESs. Once unavailable, and if a failure is present, the DS1
interface becomes available at the onset of 10 contiguous seconds
...
... with no SESs, if the failure clearing time is less than or equal
to 10 seconds. If the failure clearing time is more than 10
seconds, the DS1 interface becomes available at the onset of 10
contiguous seconds with no SESs, or the onset period leading to
...
... contiguous seconds with no SESs, or the onset period leading to
the successful clearing condition, whichever occurs later. With
respect to the DS1 error counts, all counters are incremented
while the DS1 ...
... DS1 error counts, all counters are incremented
while the DS1 interface is deemed available. While the interface
...
...
The following failure states are received, or detected failures, that
are reported in the dsx1LineStatus object. When a DS1 interface
would, if ever, produce the conditions leading to the failure state ...
... Far End Alarm failure is also known as "Yellow Alarm" in the
DS1 and J1 cases, "Distant Alarm" in the E1 ...
... Alarm signal pattern does not occur in ten contiguous 16-bit
signal pattern intervals. For DS1 the patterns is FF00 and for J1
the pattern is FFFF.
...
... Loss Of Frame (LOF) Failure
For DS1 links, the Loss of Frame failure is declared when an OOF ...
... Loss Of Signal (LOS) Failure
For DS1, the Loss of Signal failure is declared upon observing
175 +/- 75 contiguous pulse positions with no pulses of either
...
... Pseudo-Failure is declared when the near-end
equipment has placed a loopback (of any kind) on the DS1. This
allows a management entity ...
... management entity to determine from one object whether
the DS1 can be considered to be in service or not (from the point
of view of the near-end equipment).
...
... when time-slot 16 is received as all ones for all frames of two
consecutive multiframes (see G.732, Section 4.2.6). This
condition is never declared for DS1.
Loss of MultiFrame Failure ...
... application that receives SNMP messages and replies to them on
behalf of the devices that implement the actual DS1/E1 interfaces.
The proxy ...
... interfaces into its local database and may not
necessarily forward the requests to the actual DS1/J1/E1
...
...
DS1-MIB DEFINITIONS ::= BEGIN
...
... (16) A new object, dsx1LoopbackStatus, has been
introduced to reflect the loopbacks established
on a DS1 interface and the source to the requests.
dsx1LoopbackConfig ...
...
(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."
...
... STATUS current
DESCRIPTION
"The DS1 Configuration table."
::= { ds1 6 }
...
... STATUS current
DESCRIPTION
"An entry in the DS1 Configuration table."
INDEX { dsx1LineIndex }
...
...
Previously, this object was the identifier of a DS1
interface on a managed device. If there is an
...
... 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 ...
... STATUS current
DESCRIPTION
"This variable indicates the variety of DS1
Line implementing this circuit. The type of
...
... TS16
multiframing enabled
dsx1Unframed DS1 with No Framing
dsx1E1Unframed E1 with No Framing (G.703 ...
... DESCRIPTION
"This variable indicates what type of code is
being sent across the DS1 interface by the device.
Setting this variable causes the interface ...
... STATUS current
DESCRIPTION
"The length of the DS1 line in meters. This
object provides information for line build-out
circuitry. This object is only useful if the
...
... MIB II's sysUpTime object at the
time this DS1 entered its current line status
state. If the current state ...
... current state of the
loopback on the DS1 interface. It contains
information about loopbacks established by a
...
... "This variable represents the channel number of
the DS1/E1 on its parent DS2/E2 or DS3/E3. A
...
... STATUS current
DESCRIPTION
"Indicates whether this DS1/E1 or DS2 is
channelized or unchannelized.
...
...
The value of enabledDs0(2) indicates that this is a
DS1 channelized into DS0s. Setting this value will
cause the creation, and resetting it to disabled(1)
will cause the deletion of entries in the ifTable ...
... will cause the deletion of entries in the ifTable
for the DS0s that are within the DS1.
The value of enabledDs1(3) indicates that this is a
...
... The value of enabledDs1(3) indicates that this is a
DS2 channelized into DS1s. Setting this value will
cause the creation, and resetting it to disabled(1)
will cause the deletion of entries in the ifTable ...
... ::= { dsx1ConfigEntry 23 }
-- The DS1 Current Table
dsx1CurrentTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1CurrentEntry
...
... STATUS current
DESCRIPTION
"The DS1 Current table contains various statistics
being collected for the current 15-minute
interval."
...
... STATUS current
DESCRIPTION
"An entry in the DS1 Current table."
INDEX { dsx1CurrentIndex }
::= { dsx1CurrentTable 1 }
...
... DESCRIPTION
"The index value that uniquely identifies the DS1
interface to which this entry is applicable. The
...
... ::= { dsx1CurrentEntry 11 }
-- The DS1 Interval Table
dsx1IntervalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1IntervalEntry
...
... STATUS current
DESCRIPTION
"The DS1 Interval table contains various
statistics collected by each DS1 interface ...
... "The DS1 Interval table contains various
statistics collected by each DS1 interface over
the previous 24 hours of operation. The past 24
...
... STATUS current
DESCRIPTION
"An entry in the DS1 Interval table."
INDEX { dsx1IntervalIndex, dsx1IntervalNumber }
::= { dsx1IntervalTable 1 }
...
... DESCRIPTION
"The index value that uniquely identifies the DS1
interface to which this entry is applicable. The
...
... ::= { dsx1IntervalEntry 13 }
-- The DS1 Total Table
dsx1TotalTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dsx1TotalEntry
...
... STATUS current
DESCRIPTION
"The DS1 Total table contains the cumulative sum
of the various statistics for the 24-hour period
preceding the current interval."
...
... STATUS current
DESCRIPTION
"An entry in the DS1 Total table."
INDEX { dsx1TotalIndex }
::= { dsx1TotalTable 1 }
...
... DESCRIPTION
"The index value that uniquely identifies the DS1
interface to which this entry is applicable. The
...
... DESCRIPTION
"The number of Errored Seconds encountered by a DS1
interface in the previous 24-hour interval.
...
... "The number of Severely Errored Seconds
encountered by a DS1 interface in the previous
24-hour interval. Invalid 15-minute intervals
...
... "The number of Severely Errored Framing Seconds
encountered by a DS1 interface in the previous
24-hour interval. Invalid 15-minute intervals
...
... "The number of Unavailable Seconds encountered by
a DS1 interface in the previous 24-hour interval.
Invalid 15-minute intervals count as 0."
...
... "The number of Controlled Slip Seconds encountered
by a DS1 interface in the previous 24-hour
interval. Invalid 15-minute intervals count as
...
... DESCRIPTION
"The number of Path Coding Violations encountered
by a DS1 interface in the previous 24-hour
interval. Invalid 15-minute intervals count as
...
... "The number of Line Errored Seconds encountered by
a DS1 interface in the previous 24-hour interval.
Invalid 15-minute intervals count as 0."
...
... Bursty Errored Seconds (BESs)
encountered by a DS1 interface in the previous
24-hour interval. Invalid 15-minute intervals count
...
... "The number of Degraded Minutes (DMs) encountered
by a DS1 interface in the previous 24-hour
interval. Invalid 15-minute intervals count as
...
... DESCRIPTION
"The number of Line Coding Violations (LCVs)
encountered by a DS1 interface in the current
15-minute interval. Invalid 15-minute intervals
...
...
is an entry in this table corresponding to each
DS1 ifEntry within any interface that is
channelized to the individual DS1 ...
... DS1 ifEntry within any interface that is
channelized to the individual DS1 ifEntry level.
This table is intended to facilitate mapping from
...
... the ifStackTable to find the various constituent
DS1 ifTable entries, and testing various
dsx1ConfigTable entries to check for the entry
...
... ifTable entries, and testing various
dsx1ConfigTable entries to check for the entry
with the applicable DS1 channel number."
INDEX { ifIndex ...
... ifIndex value assigned
by the agent for the individual DS1 ifEntry that
corresponds to the given DS1 channel ...
... agent for the individual DS1 ifEntry that
corresponds to the given DS1 channel number
(specified by the INDEX element ...
... ::= { dsx1ChanMappingEntry 1 }
-- The DS1 Far End Current Table
dsx1FarEndCurrentTable OBJECT-TYPE
...
... STATUS current
DESCRIPTION
"The DS1 Far End Current table contains various
statistics being collected for the current
15-minute interval. The statistics are collected
...
... STATUS current
DESCRIPTION
"An entry in the DS1 Far End Current table."
INDEX { dsx1FarEndCurrentIndex }
::= { dsx1FarEndCurrentTable 1 }
...
... DESCRIPTION
"The index value that uniquely identifies the DS1
interface to which this entry is applicable. The
...
... ::= { dsx1FarEndCurrentEntry 13 }
-- The DS1 Far End Interval Table
dsx1FarEndIntervalTable OBJECT-TYPE
...
... STATUS current
DESCRIPTION
"The DS1 Far End Interval table contains various
statistics collected by each DS1 interface ...
... "The DS1 Far End Interval table contains various
statistics collected by each DS1 interface over
the previous 24 hours of operation. The past 24
...
... STATUS current
DESCRIPTION
"An entry in the DS1 Far End Interval table."
INDEX { dsx1FarEndIntervalIndex,
dsx1FarEndIntervalNumber }
...
... DESCRIPTION
"The index value that uniquely identifies the DS1
interface to which this entry is applicable. The
...
... ::= { dsx1FarEndIntervalEntry 12 }
-- The DS1 Far End Total Table
dsx1FarEndTotalTable OBJECT-TYPE
...
... STATUS current
DESCRIPTION
"The DS1 Far End Total table contains the
cumulative sum of the various statistics for the
24-hour period preceding the current interval."
...
... STATUS current
DESCRIPTION
"An entry in the DS1 Far End Total table."
INDEX { dsx1FarEndTotalIndex }
::= { dsx1FarEndTotalTable 1 }
...
... DESCRIPTION
"The index value that uniquely identifies the DS1
interface to which this entry is applicable. The
...
... "The number of Far End Errored Seconds encountered
by a DS1 interface in the previous 24-hour
interval. Invalid 15-minute intervals count as
...
... "The number of Far End Severely Errored Seconds
encountered by a DS1 interface in the previous
24-hour interval. Invalid 15-minute intervals
...
...
"The number of Far End Severely Errored Framing
Seconds encountered by a DS1 interface in the
previous 24-hour interval. Invalid 15-minute
...
... "The number of Unavailable Seconds encountered by
a DS1 interface in the previous 24-hour interval.
Invalid 15-minute intervals count as 0."
...
... "The number of Far End Controlled Slip Seconds
encountered by a DS1 interface in the previous
24-hour interval. Invalid 15 minute intervals
...
... "The number of Far End Line Errored Seconds
encountered by a DS1 interface in the previous
24-hour interval. Invalid 15-minute intervals
...
... "The number of Far End Path Coding Violations
reported via the far end block error count
encountered by a DS1 interface in the previous
24-hour interval. Invalid 15-minute intervals
...
... "The number of Bursty Errored Seconds (BESs)
encountered by a DS1 interface in the previous
24-hour interval. Invalid 15-minute intervals
...
... "The number of Degraded Minutes (DMs) encountered
by a DS1 interface in the previous 24-hour
interval. Invalid 15-minute intervals count as
...
... ::= { dsx1FarEndTotalEntry 10 }
-- The DS1 Fractional Table
dsx1FracTable OBJECT-TYPE
...
... ifStackTable.
The table was mandatory for systems dividing a DS1
into channels containing different data streams ...
... Let us further imagine that ifIndex 2 is of type
DS1 and refers to the DS1 interface and that the
...
... dsx1FracIfIndex.2.12 = 5 dsx1FracIfIndex.2.24 = 16
For North American (DS1) interfaces, there are 24
legal channels ...
... STATUS deprecated
DESCRIPTION
"An entry in the DS1 Fractional table."
INDEX { dsx1FracIndex, dsx1FracNumber }
::= { dsx1FracTable 1 }
...
... "The index value that uniquely identifies the
DS1 interface to which this entry is applicable.
The interface ...
... "This group is the set of statistics appropriate
for all systems that attach to a DS1 interface
running transparent or unFramed lineType."
...
... "Implementation of this group is optional for all
systems that attach to a DS1 interface. If it is
implemented, then ds1NearEndOptionalConfigGroup
...
... "Implementation of this group is recommended for
all systems that attach to a DS1 interface and
implement ds1NearEndOptionalTrapGroup."
...
... "This group is the set of statistics appropriate
for all systems that attach to a DS1 interface
running transparent or unFramed lineType."
...
... "Implementation of this group is optional for all
systems that attach to a DS1 interface. If it is
...
... "Implementation of this group is recommended for
all systems that attach to a DS1 interface and
implement ds1NearEndOptionalTrapGroup."
...
... "This group is the set of statistics appropriate
for all systems that attach to a DS1 interface
running transparent or unFramed lineType."
...
... DESCRIPTION
"A collection of objects providing configuration
information applicable to all DS1 interfaces."
::= { ds1Groups 1 }
...
... DESCRIPTION
"A collection of objects providing statistics
information applicable to all DS1 interfaces."
::= { ds1Groups 2 }
...
... DESCRIPTION
"A collection of objects that are the
statistics that can be collected from a DS1
interface that is running transparent or unframed
...
... DESCRIPTION
"A collection of objects providing configuration
information applicable to all DS1 interfaces."
::= { ds1Groups 10 }
...
... DESCRIPTION
"A collection of objects providing configuration
information applicable to all DS1 interfaces."
::= { ds1Groups 11 }
...
... DESCRIPTION
"A collection of objects providing statistics
information applicable to all DS1 interfaces."
::= { ds1Groups 12 }
...
...
In the case of dsx1LineType, for example, both ends of a DS1/E1 must
have the same value in order for traffic to flow ...
... American National Standard for Telecommunications -- Carrier-to-Customer Installation - DS1 Metallic Interface, T1.403, February 1989. ...
... American National Standard for Telecommunications -- Digital Hierarchy DS1-- Layer 1 In-Service Digital Transmission Performance Monitoring ...
... Baker, F. and J. Watt, "Definitions of Managed Objects for the DS1 and E1 Interface Types", RFC 1406(-> 2495(-> 3895prop(-> 4805prop))) ...
... AT&T Information Systems, AT&T ESF DS1 Channel Service Unit User's Manual, 999-100-305, February 1988. ...
...
[Old Definition]: "This object is the identifier of a DS1 Interface
on a managed device. If there is an ifEntry that is directly
...
... 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 ...
... Different physical configurations for the support of SNMP with DS1
equipment exist. To accommodate these scenarios, two different
indices for DS1 ...
... DS1
equipment exist. To accommodate these scenarios, two different
indices for DS1 interfaces are introduced in this MIB. These
...
... interface scenario: the SNMP Agent represents all managed
DS1 lines as external interfaces (for example, an Agent residing
...
... interfaces (for example, an Agent residing
on the device supporting DS1 interfaces directly):
...
... dsx1IfIndex column of the DS1 Configuration table relates each
DS1 interface to its corresponding interface (ifIndex ...
... SNMP Agents resides on
a host external from the device supporting DS1 interfaces (e.g., a
router ...
... router). The Agent represents both the host and the DS1 device.
The index dsx1LineIndex is used to not only represent the DS1 ...
... DS1 device.
The index dsx1LineIndex is used to not only represent the DS1
interfaces external from the host ...
... host/DS1-device combination, but also
the DS1 interfaces connecting the host and the DS1 device ...
... DS1 interfaces connecting the host and the DS1 device. The
index dsx1IfIndex is always equal to ifIndex ...
... | | | +---------------------+
|E | | 1.544 MBPS | Line#A | DS1 Link
|t | R |---------------+ - - - - - - - - - +------>
...
... |h | | | |
|e | O | 1.544 MBPS | Line#B | DS1 Link
|r | |---------------+ - - - - - - - - - - +------>
...
... CSU Shelf |
|e | | 1.544 MBPS | Line#C | DS1 Link
|t | T |---------------+ - - - -- -- - - - - +------>
...
... | | | | |
|-----| E | 1.544 MBPS | Line#D | DS1 Link
| | |---------------+ - - - - -- - - - - +------>
...
... description of dsx1LineIndex: the dsx1LineIndex identifies a DS1
Interface on a managed device. If there is an ifEntry that is
...
... 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 ...
... 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 ...
... 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.
...