Features
Features Manual
196
Trunk to Trunk Forwarding
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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 COIU 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
Analogue trunks must have disconnect clear enabled to ensure the lines are cleared when a call is
disconnected.
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.
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Programming
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11-10-06 : Service Code 833
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11-10-07 : Service Code 834
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11-10-08 : Service Code 835
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13-04-01 : Abbreviated Dial Name and Number
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14-01-13 : Trunk to trunk Transfer
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20-07-05 : Class of Service
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21-03-01 : Trunk Route for Automatic Trunk to Trunk Routing
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24-04-01 : Destination Abbreviated Dial Bin Number
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25-07-07 & 08 : DISA Conversation Timers