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NEAX2400 IPX ISDN Features and Specifications
Page 172
NDA-24311, Issue 1
D-123 Direct Inward Dialing (DID) Addressing
D-123 Direct Inward Dialing (DID) Addressing
General Description
This feature provides for a called party number received via ISDN to be used to designate the station at which the
call is to terminate.
Operating Procedure
No manual operation is required.
Service Conditions
1. The DIRECT INWARD DIALING (DID) numbering plan provided from the ISDN office determines the
number of stations that can take advantage of this service.
2. If the network is notified that the destination station for the DID call is busy or a connection-controlled
station, the network gives the calling station a busy tone. (This depends upon call forwarding services
being in service.)
3. The DID number can be converted to a telephone number in the PBX.
DID Addressing Conversion
Station #
Sub-
address
451-7001
451-7001
Station
1234
1201
All digits
converted
Partial
conversion
No Conversion
Conversion of 1st and 2nd digits