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9.2.3. Routing Parameters
All parameters related to the dialed number and call routing are arranged in three
routing tables. Each table pertains to one interface: FXS, FXO and GSM.
FXS routing table
According to the prefix of dialed number on FXS interface you can:
·
Bar the number to be dialed - the calling subscriber hears the busy tone;
·
Route the call to GSM network, or to PBX through the FXO interface;
·
Accelerate connection establishing by knowing the number length for the given
prefix;
·
Accelerate connection establishing by allowing to terminate dialing with a #;
·
Modify the number to be dialed by removing and/or adding prefix.
·
Set tariff metering for the given prefix.
Every table line includes a phone number prefix (of variable length) and other
parameters. The parameters define SmartGate's behavior in case the beginning of the
dialed number matches this prefix on the same table row. The table contains 120 rows
for up to 120 different prefixes.
There may be exceptions to the rule - a number may start with the same digits but
has to be served in a different way. Any table row that starts with the same prefix
followed by one or more digits is considered an exception of the line with shorter prefix.
Remember to complete the "Other prefixes" line for a number whose prefix is not
found in the table.
An example in the figure shows how to bar all international calls with the exception of
calls to Slovakia. Calls to Slovakia are routed through FXO interface and the call is
established immediately after 14 digits are dialed. All other calls are enabled and they
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