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IPECS
- MG Release 1
Feature Description & Operation
Issue 1.0
5.14 DIRECT INWARD DIAL (DID)
Description
A Carrier Service, known as Direct Inward Dial (DID), sends digits to the System so that the call
may be routed directly to a Specific Station or System Facility. DID service is available over digital
and packet networks. ISDN lines can provide two-way, incoming DID and normal Outgoing Service,
and requires no special signaling.
After collecting the digits from the Carrier, the System routes the Call to the Destination:
 Incoming DID number is compared with Digit Conversion Table. If matched, received
DID number is converted according to the Table. Separate Digit Conversion can be
applied according to DAY/Night/Timed Ring Mode.
 DID Destination is decided with the converted DID number.
 Destination can be Station, Station Group, Outgoing CO Call, Voice Mail, Net Station,
Paging, or Conference Room.
Operation
If set, DID operation is automatic.
Conditions
1. If ICLID routing is assigned for the CO/IP Line, the received Caller ID is first compared
to the ICLID Table for routing. If Caller ID does not match an entry in the ICLID Table,
the normal DID call processes are used.
2. DID calls that encounter a Busy signal, are not answered in the DID/DISA No-Answer
Timer, or are received at a Vacant or Invalid number can be routed to the Attendant,
Tone, Station Group, or VMIB announcement. When the Attendant receives such calls,
the call is appropriately identified by the Attendant Digital Phone Display.
3. For a Station that is part of a non-pilot Station Hunt group, DID calls will follow the
Group Hunt process if the Station is Busy or does not answer the call.
4. DID calls are subject to Group Call Pick-up and Directed Call Pick-up.
Programming
Station Data
CO Line Data
Numbering Plan
Table Data
1. Station DN Number (PGM130)
1. CO Line Attribute (PGM160)
2. Incoming CO Group Alternative (PGM169)
1. Feature Numbering Plan (PGM 113)
1. Digit Conversion Table (PGM 251/252)
Related Features
Hardware
DID, BRI or PRI Module
161