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Configuring Router A
1. Configure a local number in the local number configuration page: The ID is 1000, the number is
1000, the bound line is line2/0, the user name is 1000, and the password is 1000.
2. Configure a call route to Router B in the call route configuration page: The ID is 55665000, the
destination number is 55665000, the routing type is SIP, and the routing method is proxy server.
Configuring Router B
1. Configure a local number in the local number configuration page: The ID is 55665000, the
number is 55665000, and the bound line is line2/0.
2. Configure a call route to Router A in the call route configuration page: The ID is 1000, the
destination number is 1000, the routing type is SIP, and the routing method is proxy server.
3. Configure SIP registration in the connection properties configuration page: Enable SIP registration,
and configure the main registrar’s IP address as 2.1.1.2.
Verifying the configuration
• Select Voice Management > States and Statistics > Local Survival Service States from the
navigation tree. You can find that number 1000 has been registered with the local SIP server on
Router C.
• Place a call from phone 1000 to phone 55665000. The local SIP server on Router C adds prefix
8899 before the calling number, and sends the call to phone 55665000. Pick up phone
55665000. The call is established.
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