ISD2-MIB

All MIBs › ISD2-MIB

Category: Device Management

Description: ISD2 network device MIB providing SNMP management objects for integrated services device version 2 monitoring and configuration.

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What Is ISD2-MIB?

ISD2-MIB is a vendor MIB for an Integrated Services Device (version 2), a telecom-oriented platform handling ISDN-style signaling and D-channel operations. It exposes signaling channel and D-channel tables tracking Layer 2 state, call establishment identifiers (CES/SAPI), and error conditions like call collisions, address-check failures, and short-frame receive errors. Its monitoring purpose is centered on the software/protocol health of signaling links: whether a signaling channel's Layer 2 state is up, and whether call collisions or address failures are occurring, which would indicate signaling instability affecting call setup. No explicit dependency on other MIBs is evident from the available extract, though ifIndex-style indexing (isd2SigChanIfIndex, isd2DchanIfIndex) suggests correlation with standard interface tables. Deployment context is ISDN/telecom access equipment such as channel banks or integrated access devices handling D-channel signaling. Network engineers evaluating or troubleshooting this functionality can download the ISD2-MIB file directly to load it into their MIB browser.

IPNetwork Monitor allows you to monitor SNMP objects defined in ISD2-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

ISDN/telecom integrated services device (channel bank/access device)

Monitoring Examples

An administrator would poll isd2SigChanTable/isd2SigChanEntry keyed by isd2SigChanIfIndex to check isd2SigChanL2State, confirming Layer 2 signaling is up on a given channel. Rising isd2SigChanCallCollisions or isd2SigChanAddressCheckFails would indicate signaling contention or misconfiguration disrupting call setup. isd2DchanTable/isd2DchanEntry's isd2DchanRxShort counter would be checked if D-channel frames are being truncated, pointing to a physical-layer or timing issue on that channel.

What Can Be Monitored

signaling channel Layer 2 state
call collision counts
address-check failure counts
D-channel short-frame receive errors

Imported Objects

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter

From SCANET-MIB

scanet

OBJECT-IDENTITY

OIDs

OID symbolic	OID numeric	Type	Access	Description
isd2	1.3.6.1.4.1.208.48
isd2SigChan	1.3.6.1.4.1.208.48.1
isd2SigChanTable	1.3.6.1.4.1.208.48.1.1		not-accessible	Table containing configuration and operational parameters for all ISDN Signalling Channels on this managed device.
isd2SigChanEntry	1.3.6.1.4.1.208.48.1.1.1		not-accessible	An entry in the ISDN Signalling Channel Table.
INT isd2SigChanIfIndex	1.3.6.1.4.1.208.48.1.1.1.1	INTEGER	read-only	Interface index for this signalling channel.
INT isd2SigChanL2State	1.3.6.1.4.1.208.48.1.1.1.2	INTEGER	read-only	Signalling layer-2 state (Q.921).
CTR isd2SigChanCES	1.3.6.1.4.1.208.48.1.1.1.3	Counter	read-only	Connection Endpoint Suffix (CES) for this signalling channel.
CTR isd2SigChanSAPI	1.3.6.1.4.1.208.48.1.1.1.4	Counter	read-only	Service Access Point Identifier (SAPI) for this signalling channel
CTR isd2SigChanCallCollisions	1.3.6.1.4.1.208.48.1.1.1.5	Counter	read-only	The number of calls over this signalling channel which failed because of collision.
CTR isd2SigChanAddressCheckFails	1.3.6.1.4.1.208.48.1.1.1.6	Counter	read-only	The number of incoming calls over this signalling channel which were refused because of address mismatch.
isd2Dchan	1.3.6.1.4.1.208.48.2
isd2DchanTable	1.3.6.1.4.1.208.48.2.1		not-accessible	Table containing statistics for all ISDN D-Channels on this managed device.
isd2DchanEntry	1.3.6.1.4.1.208.48.2.1.1		not-accessible	An entry in the ISDN D-Channel Table.
INT isd2DchanIfIndex	1.3.6.1.4.1.208.48.2.1.1.1	INTEGER	read-only	The Ifindex of this D-channel.
CTR isd2DchanRxShort	1.3.6.1.4.1.208.48.2.1.1.2	Counter	read-only	The number of frames received which were discarded due to the frame length being too short.
CTR isd2DchanRxLong	1.3.6.1.4.1.208.48.2.1.1.3	Counter	read-only	The number of frames received which were discarded due to the frame length being too long.
CTR isd2DchanRxCRCerror	1.3.6.1.4.1.208.48.2.1.1.4	Counter	read-only	The number of frames received which were discarded due to Cyclic Redundancy Check (CRC) errors. This figure indicates the number of bit errors occuring over the WAN link.
CTR isd2DchanRxResidual	1.3.6.1.4.1.208.48.2.1.1.5	Counter	read-only	The number of times the frame contained residual bits. This should not occur.
CTR isd2DchanRxAborts	1.3.6.1.4.1.208.48.2.1.1.6	Counter	read-only	The number of times the High-Level Data Link Control (HDLC) 'Abort' signal was received, indicating that the received packet should be ignored.
CTR isd2DchanRxOverrun	1.3.6.1.4.1.208.48.2.1.1.7	Counter	read-only	The number of frames which were lost due to bus overload within the router. This should not occur.
CTR isd2DchanRxLostSync	1.3.6.1.4.1.208.48.2.1.1.8	Counter	read-only	The number of frames which were lost due to drop of signal on the line.
CTR isd2DchanRxBufferLack	1.3.6.1.4.1.208.48.2.1.1.9	Counter	read-only	The number of received frames which were lost due to RAM (buffer) overload within the router.
CTR isd2DchanRxApplnotready	1.3.6.1.4.1.208.48.2.1.1.10	Counter	read-only	The number of received frames which were discarded since there was a temporary situation with no upper layer to receive the frame.
CTR isd2DchanRxUnknownProto	1.3.6.1.4.1.208.48.2.1.1.11	Counter	read-only	The number of incoming frames which were discarded due to unknown protocol field.
CTR isd2DchanTxDiscardedProto	1.3.6.1.4.1.208.48.2.1.1.12	Counter	read-only	The number of protocol frames for transmission which were lost due to RAM (buffer) overload within the router.
CTR isd2DchanTxDiscardedData	1.3.6.1.4.1.208.48.2.1.1.13	Counter	read-only	The number of data frames for transmission which were lost due to RAM (buffer) overload within the router.
CTR isd2DchanTxUnderrun	1.3.6.1.4.1.208.48.2.1.1.14	Counter	read-only	The number of frames for transmission that were not successfully transmitted due to CPU (processor) overload within the router.
CTR isd2DchanTxCollision	1.3.6.1.4.1.208.48.2.1.1.15	Counter	read-only	The number of outgoing frames which were discarded due to collisions that occured during transmission.
isd2Phys	1.3.6.1.4.1.208.48.3
isd2PhysTable	1.3.6.1.4.1.208.48.3.1		not-accessible	Table containing physical layer status for all ISDN ports on this managed device.
isd2PhysEntry	1.3.6.1.4.1.208.48.3.1.1		not-accessible	An entry in the ISDN physical layer Table.
INT isd2PhysIfIndex	1.3.6.1.4.1.208.48.3.1.1.1	INTEGER	read-only	IfIndex for this ISDN port.
INT isd2PhysL1State	1.3.6.1.4.1.208.48.3.1.1.2	INTEGER	read-only	Physical layer state for this ISDN port.
INT isd2PhysL1Alarm	1.3.6.1.4.1.208.48.3.1.1.3	INTEGER	read-only	Primary Rate Interface alarm for this ISDN port. This entry is unused for BRI. 0 means noDetectedProblem
isd2CallCtrl	1.3.6.1.4.1.208.48.4
isd2CallCtrlTable	1.3.6.1.4.1.208.48.4.1		not-accessible	Table containing configuration and operational parameters for all ISDN links on this managed device.
isd2CallCtrlEntry	1.3.6.1.4.1.208.48.4.1.1		not-accessible	An entry in the ISDN link Table.
INT isd2CallCtrlSigchanIfIndex	1.3.6.1.4.1.208.48.4.1.1.1	INTEGER	read-only	Interface index for the current signalling-channel associated with this link. The index is zero if no signalling-channel is associated.
INT isd2CallCtrlBchanIfIndex	1.3.6.1.4.1.208.48.4.1.1.2	INTEGER	read-only	Interface index for the current B-channel associated with this link. The index is zero if no B-channel is allocated.
OCT isd2CallCtrlLocalNumber	1.3.6.1.4.1.208.48.4.1.1.3	OCTET STRING	read-only	The local ISDN number for this link.
OCT isd2CallCtrlLocalSubaddr	1.3.6.1.4.1.208.48.4.1.1.4	OCTET STRING	read-only	The local ISDN subaddress for this link.
OCT isd2CallCtrlRemoteNumber	1.3.6.1.4.1.208.48.4.1.1.5	OCTET STRING	read-only	The ISDN number the current or last call is or was connected to.
OCT isd2CallCtrlRemoteSubaddr	1.3.6.1.4.1.208.48.4.1.1.6	OCTET STRING	read-only	The ISDN subaddress the current or last call is or was connected to.
INT isd2CallCtrlL3State	1.3.6.1.4.1.208.48.4.1.1.7	INTEGER	read-only	Signalling layer-3 state (Q.931 and custom). 0 means nullState.
INT isd2CallCtrlCallRef	1.3.6.1.4.1.208.48.4.1.1.8	INTEGER	read-only	Signalling layer-3 call reference (Q.931).
INT isd2CallCtrlChannelNum	1.3.6.1.4.1.208.48.4.1.1.9	INTEGER	read-only	The current B-channel number associated with this link.
CTR isd2CallCtrlOutCallsConnected	1.3.6.1.4.1.208.48.4.1.1.10	Counter	read-only	The number of outgoing calls on this link which were actually connected.
CTR isd2CallCtrlOutCallsFailed	1.3.6.1.4.1.208.48.4.1.1.11	Counter	read-only	The number of outgoing calls on this link which failed.
CTR isd2CallCtrlInCallsConnected	1.3.6.1.4.1.208.48.4.1.1.12	Counter	read-only	The number of incoming calls on this link which were actually connected.
CTR isd2CallCtrlInCallsRefused	1.3.6.1.4.1.208.48.4.1.1.13	Counter	read-only	The number of incoming calls on this link which were refused.
CTR isd2CallCtrlCallCollisions	1.3.6.1.4.1.208.48.4.1.1.14	Counter	read-only	The number of calls on this link which failed because of collision.
INT isd2CallCtrlCauseCode	1.3.6.1.4.1.208.48.4.1.1.15	INTEGER	read-only	The encoded network cause value associated with the last call. This object will be updated whenever a call is started or cleared. The value of this object will depend on the interface type as well as on the protocol and protocol version being used on this interface. Some references for possible cause values are given below.
INT isd2CallCtrlLocationCode	1.3.6.1.4.1.208.48.4.1.1.16	INTEGER	read-only	The encoded network cause location value associated with the last call. This object will be updated whenever a call is started or cleared.
OCT isd2CallCtrlCauseText	1.3.6.1.4.1.208.48.4.1.1.17	OCTET STRING	read-only	ASCII text describing the reason for the last call termination. This object will be updated whenever a call is started or cleared.

RFC description

Intel Private ISDN MIB providing objects for ISDN signalling channel, D-channel, and physical layer management.

Start monitoring ISDN/telecom integrated services device (channel bank/access device) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download ISD2-MIB

What Is ISD2-MIB?

Supported Devices

Monitoring Examples

What Can Be Monitored

This MIB depends on

Related MIBs

RFC description