User's Manual

Procedure
1. Start Manager and connect to the B5800 Branch Gateway system.
2. In the left navigation pane, click Line.
3. For each line enter the prefix. The location of the relevant setting varies for each
trunk type.
• For analog trunks, select the Line Settings tab and enter the prefix in the
Prefix field.
• For T1 and T1 PRI trunks, select the PRI 24 Line tab and enter the prefix in
the Prefix field.
• For BRI, E1 PRI, S0 and QSIG trunks, select the PRI Line tab and enter the
appropriate prefix in the following fields:
• Prefix
• National Prefix
• International Prefix
4. Select File > Save Configuration.
SIP trunk prefixes
The prefix fields Prefix, National Prefix, Country Code and International Prefix are available
with the SIP line settings. These fields are used in the following order:
1. If an incoming number (called or calling) starts with the + symbol, the + is replaced
with the International Prefix.
2. If the Country Code has been set and an incoming number begins with that Country
Code or with the International Prefix and Country Code, they are replaced with the
National Prefix.
3. If the Country Code has been set and the incoming number does not start with the
National Prefix or International Prefix, the International Prefix is added.
4. If the incoming number does not begin with either the National Prefix or International
Prefix, then the Prefix is added.
For example, if the SIP line is configured with the following prefixes, the numbers are processed
as described in the table below.
• Line Prefix: 9
• National Prefix: 90
Setting the trunk prefixes
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