Setting The Trunk Prefixes - Avaya IP500 V2 Installation Manual

5.8 Setting the Trunk Prefixes

By default, systems with a U-Law System SD card default to using a 9 prefix for external calls. Systems started with a A-
Law System SD card default to no prefix (any dialing that doesn't match an internal number is assumed to be an external
number).
Where a prefix is used for outgoing calls, that same prefix needs to be added to trunk settings. The trunk prefix is then
used as follows:
· On incoming calls the prefix is added to any incoming ICLID received with the call. That allows the ICLID to be used
by IP Office phones and applications to make return calls.
· On outgoing calls, the short codes used to route the call to a trunk must remove the dialing prefix.
To set trunk prefixes:
1. Within the IP Office configuration, select
2. For each line enter the prefix. The location of the relevant setting varies for each trunk type.
· Analog Trunks
· T1 and T1 PRI Trunks
Installing IP500/IP500 V2
IP Office 9.0
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