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CHAPTER 5 NDA-24305
Page 78
Revision 1.0
DIRECT-IN TERMINATION (DIT)-PRI
D-137 DIRECT-IN TERMINATION (DIT)-PRI
1. General Description
This feature automatically routes incoming network exchange calls from an ISDN network and Public/Private
Telecommunication network directly to a preselected station without Attendant assistance. The call can then be
processed by the called party. THREE-WAY CALLING [T-2], CALL TRANSFER [C-10], etc., are handled in
the same manner as any normal trunk call.
2. Operation Procedure
The calling party, outside the system, dials the telephone number as usual. However, the call is answered directly
at a predetermined station, bypassing the ATTENDANT CONSOLE [A-3].
3. Programming
STEP 1: Assign the Basic Data for ISDN. (Refer to Chapter 3, “Basic Data Assignment for ISDN”.)
STEP 2: ASYD - System Data 1, Index 147: DIT supervisory timer for a busy station.
Note: This index works when System Data 2, Index 11, bit 7=1.
System Data 2,Index 11,bit 7:Will the DIT call to a busy station be routed to ATT or queue
to the busy station?
0/1=ATT/Queue
Note: If the call goes to ATT, it will ring in on the BUSY
or ICPT key.
STEP 3: ARSC - The DIT target station receiving the call must be assigned a Route Restriction Class (RSC),
allowing the station to be connected to the trunk. The DIT route must be allowed via Route
Restriction Indexes (RRI) 0 & 1.
STEP 4: ACFR - Designate the type of incoming Call Class Indexes (CCI) which require a Transfer Service
Feature Index (TSFI) = 3, DIRECT-IN TERMINATION. The type of CCI must match
CDN 6 of the DIT route. For Night DIT (NIGHT CONNECTION-FIXED [N-1]), allow the
CCI a TSFI = 2, NIGHT CONNECTION-FIXED [N-1].
For Day and Night DIT Service-Same Station
STEP 5: ACSI - Assign the Route Number, Trunk Number, and Connection Service Index = 3 for DIT. Then
assign the Tenant Number and Station Number to serve as the DIT station.
For Day DIT Service
STEP 6: ACSA - Assign the Route Number, Trunk Number, Connection Service Index A = 2 for DIT. Then
assign the Tenant Number and Station Number to serve as the DIT station.