ISDN-MIB :: isdnDirectoryNumber

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

All MIBs › ISDN-MIB › isdnDirectoryNumber

isdnDirectoryNumber

Module: ISDN-MIB

OID (symbolic): ISDN-MIB::isdnDirectoryNumber

OID (numeric): 1.3.6.1.2.1.10.20.1.5.1.1.2

Node type: OBJECT-TYPE

Type: DisplayString

Access: read-create

Description: A Directory Number. Directory Numbers are used to identify incoming calls on the signaling channel given in isdnDirectorySigIndex.

The format of this information largely depends on the type of switch or PBX the device is connected to. Therefore, the detailed format of this information is not specified and is implementation dependent.

If possible, the agent should implement this information using the E.164 number format. In this case, the number must start with '+'. Otherwise, IA5 number digits must be used.

What is isdnDirectoryNumber?

Read-create Directory Number (ideally E.164 format starting with '+') used to identify which incoming calls on the signaling channel named in isdnDirectorySigIndex belong to this device, letting one signaling channel serve several distinct dialed numbers.

OID Breakdown

Upper-level ancestors (7 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.2mgmtAPERTUS-NPG-MIB
1.3.6.1.2.1mib_2AXON-MIB
1.3.6.1.2.1.10transmissionCHECKPOINT-MIB-2
Numeric OIDNameModule
1.3.6.1.2.1.10.20isdnMibISDN-MIB
1.3.6.1.2.1.10.20.1isdnMibObjectsISDN-MIB
1.3.6.1.2.1.10.20.1.5isdnDirectoryGroupISDN-MIB
1.3.6.1.2.1.10.20.1.5.1isdnDirectoryTableISDN-MIB
1.3.6.1.2.1.10.20.1.5.1.1isdnDirectoryEntryISDN-MIB
1.3.6.1.2.1.10.20.1.5.1.1.2isdnDirectoryNumberISDN-MIB