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Chapter 2 – Configuration
24 Multi-Tech Systems, Inc. Avaya Communication Manager Guide
8. Create Outbound Phone Book entries to allow the mapping of digit patterns (area codes, 911 calls, etc)
to FXO trunks during gatekeeper survivable mode.
When a survivable call comes in from the IP network to the MultiVOIP gatekeeper, the MultiVOIP will
search through the Outbound Phone book entries in an attempt to find an entry whose Destination
Pattern matches the first few digits of the destination phone number for the call.
If a match is found, the MultiVOIP will manipulate the digits according to the Remove Prefix and Add
Prefix fields of the Outbound Phone book entry. The call with the manipulated digits will be routed to
the predefined gatekeeper endpoint whose Names entry matches the H.323 ID configured in the
Outbound Phone Book entry. This is the normal sequence for calls to FXO trunks.
If there is no match in the Outbound Phone book, the MultiVOIP gatekeeper will try to find a matching
number in the Phones field of one of the MultiVOIP gatekeeper predefined endpoints. This is the
normal sequence for calls to FXS ports or IP phones.
Suppose the MultiVOIP resides in the 763 exchange of the Minneapolis area with its FXO trunk
connected to PSTN lines. This area has an overlayed area code system where calls to 763, 612, 952, and
651 exchanges are all local calls. In this example, we will add Outbound Phone book entries to allow
calls to phone numbers within these exchanges as well as 911 calling for emergencies.
8a. Go to the MultiVOIP’s Phone Book | Phone Book Modify | Outbound Phone Book | List Entries
screen as seen below.