NEC NEAX 2000, Руководство по программированию

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ND-91285-001(E)
DECEMBER, 1999
Page 359
Revision 1.0
(1/1)
TANDEM SWITCHING OF TIE TRUNKS - 2/4 -WIRE
GENERAL DESCRIPTION
This feature allows Trunk-to-Trunk connections through the switching system, without the need for
any Attendant assistance or control. The major use of this feature is in association with the dial tandem Tie
Line network to allow Tie Line connections.
STATION APPLICATION
Not applicable
OPERATING PROCEDURE
1. Lift handset; receive Dial Tone from own PABX.
2. Dial tie trunk access code; receive Dial tone from system.
3. Dial another tie trunk access code.
OR
Dial “0”; receive Dial Tone from other distant PABX.
4. Dial an station number of distant PABX.
SERVICE CONDITIONS
1. When using E&M application, an ODT card is required for every Tie Line. This card provides attenu-
ation, so that the desired transmitting and receiving levels can be maintained, providing the overall tan-
dem system with transparency.
2. When all Tie Trunks are busy, the calling station will receive Busy Tone.
3. Careful consideration should be given to access code numbering plans to avoid unnecessary loss of
access codes and code duplication within the same system.
4. Tandem switching can also be accomplished via the Attendant Console.
5. There is no limitation on the allowable number of tandem switching connections.
6. Incoming dial repeating tie trunks can connect to the following types of outgoing trunks:
• Dial repeating tie trunks
• C.O. trunks.
7. Incoming trunks may be restricted from outgoing access to other trunks on a trunk route basis.
8. All trunk routes assigned for no release signal are restricted from tandem connections.
9. The Station Message Detail Recording (SMDR) feature will apply to incoming Tie Line calls which
dial access an outgoing trunk.