Avaya IP Office Phone Manager, Installation Manual, Page: 163 / 411

IP Office Installation Page 162
15-601042 Issue 20b (16 July 2009) IP Office
8.3 Prefix Dialing
Where a prefix has been implemented for outgoing calls, that same prefix needs to be added to trunk settings. The 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.
•
Previously, on outgoing calls, any prefix on the digits received by the trunk to dial was removed since that prefix
will not be valid at the central office exchange. Unlike previous IP Office releases, IP Office 4.0 does not do this
and so whichever short codes are used to route a call to a trunk, they must be setup so as to remove the dialing
prefix.
Objective
Ensure the correct prefix is added to incoming calls.
Procedure
1. Within the IP Office configuration, select Line.
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