| 摘要 |
Disclosed is a SIP client having a session initiation protocol module. A router that is capable of communicating with the SIP client, the router having a closest anycast IP server module. A SIP proxy server having an anycast address and a unicast address replacement module, the unicast address replacement module capable of replacing the anycast IP address of a received IP packet, that includes a session initiation protocol request message, with a unicast IP address of the SIP proxy server.
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