User's Manual

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
• International Prefix: 900
• Country Code: 44
Number Received Processing Resulting Number
[phone] Following rule 1 above, the +
is replaced with the
International Prefix (900),
resulting in
900441707362200.
The number now matches
the International Prefix (900)
and Country Code (44).
Following rule 2 above they
are replaced with the
National Prefix (90).
901707362200
00441707362200 Following rule 2 above the
International Prefix (900) and
the Country Code (44) are
replaced with the National
Prefix (90).
90107362200
441707362200 Following rule 2 above, the
Country Code (44) is
replaced with the National
Prefix (90).
901707362200
6494770557 Following rule 3 above the
International Prefix (900) is
added.
9006494770557
Setting the trunk prefixes
Implementing the Avaya B5800 Branch Gateway November 2011 135