CHAPTER 5 NDA-24305
Page 78
Revision 1.0
DIRECT-IN TERMINATION (DIT)-PRI
D-137 DIRE CT-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 assista nce. 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 n umber as us ual. However, the call is answered directly
at a predetermined station, bypassing the ATTENDANT CONSOLE [A-3].
3. Programming
STEP 1: Assign the Basic Dat a 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 s tation receiving the call m ust b e assigne d a R oute Rest rict ion 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 t ype 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, a nd Connectio n Service I ndex = 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.