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Call redirection – H3C Technologies H3C MSR 50 User Manual

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Figure 674 Call setup procedures involving a proxy server

This is a simplified scenario where only one proxy server is involved and no registrar is present. However,

a complex scenario can involve multiple proxy servers and registrars.

Call redirection

When a SIP redirect server receives a session request, it sends back a response indicating the address of
the called SIP endpoint instead of forwarding the request. The calling and called endpoints therefore can

send request and response to each other directly. See

Figure 675

.

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