XEN Topaz
NEC Business Solutions Ltd
Features and Specifications Manual
Chapter 4 - 333
D
oc. N
o. 8846 -
Release
2.0
Apr
il 2005
Trunk to Trunk Forwarding
• Description
Trunk to trunk forwarding refers to the forwarding of incoming trunk calls off premise.
The forward can be set for each trunk and each trunk can have its own destination
number that the calls are forwarded to.
The feature can be set for trunk ports that are set as Normal (Type 0 in Program 22-02-
01) and can be used for COI and ISDN trunk ports.
The call forward is controlled by service codes. The destination can also be changed
by the user for each night mode (1-8).
When call forward is set all incoming calls to the trunk will be forwarded immediately.
The destination of the call forward is saved in an Abbreviated Dial bin, the bin is
defined by Program 24-04-01. If a different call forward destination is required for each
night mode then a different Abbreviated Dial bin must be defined for each night mode.
A call that is forwarded will be disconnected after timers 25-07-07 & 08.
The outgoing trunk route is defined by Program 21-03-01. A free trunk within this route
will be used when a call is forwarded.
Trunk to trunk transfer must be enabled for each trunk by Program 14-01-13. If this
item is not enabled the call forward can not be set.
Conditions
A. Analogue trunks must have disconnect clear enabled to ensure the lines are
cleared when a call is disconnected.
B. Trunk to trunk call forward can not be set from an analogue SLT.
Default Setting
The service code to enable trunk to trunk forwarding is 833.
The service code to disable trunk to trunk forwarding is 834.
The service code to set/change the destination number is 835.
Abbreviated Dial bin 1999 is used as the call forward destination for all night modes.
The disconnect timers are set to give a warning tone after 30 seconds and then
disconnect after another 15 seconds.
The outgoing trunk route is not defined.
Trunk to trunk transfer is disabled.
Disconnect clear is not set.
Trunk to trunk call forward setting is enabled in Class of Service.
• Programming
11-10-06 : Service Code 833
11-10-07 : Service Code 834
11-10-08 : Service Code 835
13-04-01 : Abbreviated Dial Name and Number
14-01-13 : Trunk to trunk Transfer
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