H3C XE 200 IP, Руководство по эксплуатации

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Operation Manual – Process Server Configuration
H3C XE 200/2000 IP PBX
Chapter 4 SIP Overview
4-10
The SIP registrar can provide statistics such as messages sent/received by the internal
and external modules and errors generated.
4.2.4 SIP Redirect Server
When an XE IP PBX operates in call-redirect model, it is a redirect server which has the
following features:
z
User-to-user call involving redirection
This is only a simplified redirection-involved call flow.
If the mode of a received call is redirect, the SIP proxy server, after resolving the
address, responds to the caller’s UA with a 3xx response containing the address
information of the callee’s UA.
Based on the returned address information, the caller’s UA directly calls the callee’s UA.
In this case, neither the SIP redirect server nor the SIP LS maintains any call state
information or provides any service.
This approach is widely adopted in actual applications.
z
Two transport protocols: TCP and UDP.
z
Statistics query
The redirect server can provide statistics such as messages sent/received by the
internal and external modules and errors generated.