NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1 Page 57
Direct-In Termination (DIT) - PRI D-137
D-137 Direct-In Termination (DIT) - PRIGeneral 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 - ATTENDANT [C-10], etc.,
are handled in the same manner as any normal trunk call.
Operating Procedure
The calling party, outside the system, dials the telephone number as usual. Ho wever, the c all is a nswe red di rectly at
a predetermined station, bypassing the ATTENDANT CONSOLE [A-3].
Service Conditions
1. Any group(s) of trunks can be used, up to the maximum capacity of the NEAX2400 IPX.
2. Bothway trunks can be used for DIRECT-IN TERMINATION, but incoming only trunks are
recommended.
3. It is not necessary to order special DID trunks to the telephone company as is required with DIRECT
INWARD DIALING [D-8]. However, care should be exercised in the application of Central Office trunk
hunting.
4. If the called station is busy, that call is kept ringing until the called station becomes idle, or is forwarded
to the ATTENDANT CONSOLE [A-3].
5. If there is no answer at a station, the calling party will continuously receive ringback tone. There is no
AUTOMATIC RECALL [A-8] to the Attendant in this case.
6. Once a call is answered, it can be processed by the called station like any normal trunk call.
7. If the station is assigned to a STATION HUNTING - CIRCULAR [S-7], STATION HUNTING -
SECRETARIAL [S-8], or STATION HUNTING - TERMINAL [S-9] group, the incoming call will follow
the hunt group station assignment. If the station is in a CALL FORWARDING - BUSY LINE [C-2],
CALL FORWARDING - DON’T ANSWER [C-3], or CALL FORWARDING - ALL CALLS
[C-5] mode, the incoming call is connected to the call forward target station.
8. This feature is normally used where Direct-In service is required on a limited basis. The number of stat ions
thus serviced is effectively limited to the number of tr unks available for DIRECT-IN TERMINATION.
9. DIRECT-IN TERMINATION and NIGHT CONNECTION - FIXED [N-1] are mutually exclusive.
10. DIT trunks can be programmed to terminate elsewhere in the Night mode.
11. When the system is in the Night mode of operation and the DIRECT-IN TERMINATION (DIT) station
is busy, the call diverts to TAS if p rovided; otherwise, the call waits o n the busy station until it is idle.
12. Only one trunk can be arranged for DIRECT-IN TERMINATION to a particular station line.
13. The DIRECT-IN TERMINATION feature is limited to the following trunk types:
a.) CO
b.) automatic-in tie trunk
14. If the assigned station is busy when a call arri ves, the cal l is held wa iting. The c all waiting tone is not
provided to the DIT station. The calling party hears the ringback tone.
15. The DIT call can terminate to a DO NOT DISTURB - Dterm [D-11D] station.