AT-PRI-MIB

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Organization: Allied Telesis, Inc

Last Updated: 2006-06-28

Category: Network Interfaces, Vendor: Allied Telesis

Description: Manages ISDN Primary Rate Interface (PRI) T1/E1 configuration, D-channel status, and call statistics on Allied Telesis WAN modules.

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What Is AT-PRI-MIB?

AT-PRI-MIB is an Allied Telesis private MIB for ISDN Primary Rate Interface (PRI) T1/E1 WAN modules installed in Allied Telesis routers. It exposes per-interface configuration such as board index/position, interface mode and type, and TDM/ISDN channel mapping, along with per-channel status entries. Its monitoring value is largely operational/hardware-adjacent: it lets an operator confirm a PRI module and its individual B/D-channels are correctly provisioned and up, which is central to diagnosing WAN link and call-signalling faults. It builds on general ISDN/telephony concepts rather than a specific IETF standard MIB. It is typically deployed on Allied Telesis routers carrying voice or WAN PRI circuits at branch or PBX-facing sites, where administrators load the AT-PRI-MIB into a MIB Browser to poll these interfaces.

IPNetwork Monitor allows you to monitor SNMP objects defined in AT-PRI-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

Allied Telesis router with PRI/WAN interface module

Monitoring Examples

An admin would poll priIntTable/priIntEntry indexed by priIntIndex and priIntBoardIndex/priIntBoardPosition to confirm priIntMode and priIntType match the expected T1 or E1 provisioning, then inspect priIntTdmChannelMap/priIntIsdnChannelMap to verify channel assignment. priChanTable/priChanEntry, linked via priChanIntIndex, would then be checked per-channel to spot a channel that has dropped out of service on an otherwise-up PRI interface.

What Can Be Monitored

PRI interface mode/type
board index/position
D-channel/B-channel mapping
per-channel status

Imported Objects

From AT-SMI-MIB

DisplayStringUnsized
modules	OBJECT-IDENTITY

From IF-MIB

ifIndex

OBJECT-TYPE

From SNMPv2-SMI

MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE

From SNMPv2-TC

DisplayString
TruthValue

OIDs

OID symbolic	OID numeric	Type	Access	Description
pri	1.3.6.1.4.1.207.8.4.4.4.42			This MIB file contains definitions of managed objects for the PRI module.
priIntTable	1.3.6.1.4.1.207.8.4.4.4.42.1		not-accessible	The table of PRI interfaces.
priIntEntry	1.3.6.1.4.1.207.8.4.4.4.42.1.1		not-accessible	A single entry in the PRI interfaces table.
INT priIntIndex	1.3.6.1.4.1.207.8.4.4.4.42.1.1.1	INTEGER	read-only	The ifIndex of the PRI interface.
INT priIntBoardIndex	1.3.6.1.4.1.207.8.4.4.4.42.1.1.2	INTEGER	read-only	The index in the arBoardTable of the board on which this PRI interface resides.
INT priIntBoardPosition	1.3.6.1.4.1.207.8.4.4.4.42.1.1.3	INTEGER	read-only	The position on this PRI interface's board of this PRI interface.
INT priIntMode	1.3.6.1.4.1.207.8.4.4.4.42.1.1.4	INTEGER	read-only	The mode of operation of this PRI interface. The value isdn means that the entire interface is operating as an ISDN interface, the value tdm means that the entire interface is operating as TDM groups and the value mixed means that some channels in the interface are dedicated to ISDN and some to TDM groups.
INT priIntTdmChannelMap	1.3.6.1.4.1.207.8.4.4.4.42.1.1.5	INTEGER	read-only	A bit map of the channels in the PRI interface which are dedicated to TDM. PRI channels are numbered from 0 to 31, 0 is unused, 16 (E1) or 24 (T1) is the D channel. The map values are 2 to the power of the channel number.
INT priIntIsdnChannelMap	1.3.6.1.4.1.207.8.4.4.4.42.1.1.6	INTEGER	read-only	A bit map of the channels in the PRI interface which are dedicated to ISDN. PRI channels are numbered from 0 to 31, 0 is unused, 16 (E1) or 24 (T1) is the D channel. The map values are 2 to the power of the channel number.
INT priIntType	1.3.6.1.4.1.207.8.4.4.4.42.1.1.7	INTEGER	read-only	The type of primary rate interface. E1 has 30 B + D channel, T1 has 23 B + D channel. If the value unknown is returned for this object, the exact PRI type has not yet been determined.
priChanTable	1.3.6.1.4.1.207.8.4.4.4.42.2		not-accessible	The table of channels on PRI interfaces.
priChanEntry	1.3.6.1.4.1.207.8.4.4.4.42.2.1		not-accessible	A single entry in the PRI channels table.
INT priChanIntIndex	1.3.6.1.4.1.207.8.4.4.4.42.2.1.1	INTEGER	read-only	The ifIndex of the PRI interface.
INT priChanChannelIndex	1.3.6.1.4.1.207.8.4.4.4.42.2.1.2	INTEGER	read-only	The channel index of the PRI channel. Valid channels have indices from 1 to 31. The D channel on an E1 interface has index 16, the D channel on a T1 interface has index 24.
INT priChanMode	1.3.6.1.4.1.207.8.4.4.4.42.2.1.3	INTEGER	read-only	The mode of this PRI channel. The value isdn means that the channel is reserved for use in ISDN calls. The value tdm means that the channel is reserved for use by TDM. For the D channel, this object will usually have the value isdn. An exception is if the interface is running common D channel mode and the D channel is reserved for TDM.
INT priChanState	1.3.6.1.4.1.207.8.4.4.4.42.2.1.4	INTEGER	read-only	The state of this PRI channel. The value inactive means that the channel does not currently have an active user, either an ISDN call or an active TDM group. The value active means that the channel is in use, either by an ISDN call or an active TDM group.

RFC description

Manages Primary Rate Interface (PRI) modules and channels on Allied Telesis routers with diagnostic information.

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Download AT-PRI-MIB

What Is AT-PRI-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description