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
4-7
A SIP response is sent indicating whether a call or registration request is accepted or
fails. Each SIP response contains a three-digit status-code, where the first digit defines
the class of response and the last two digits provide more information. The following
table lists the classes of response.
Table 4-2 Status codes of response
Status code Means… Falls into class Message type
100 to 199
A request is received
and being processed
Provisional Proceeding
200 to 299
The request is
successfully received,
understood, and
accepted
Success Completed
300 to 399
Further action needs
to be taken to
complete the request
Redirection Completed
400 to 499
The request contains
bad syntax and the
SIP Server cannot
process it
Client error Completed
500 to 599
The SIP Server fails
and cannot process
the valid request
Server error Completed
600 to 699
The request cannot be
fulfilled at any server
Global failure Completed
As required by SIP, the application may ignore the last two digits of status code, but it
must understand the first digit.
4.2 Functionality and Features of SIP Server
4.2.1 SIP Proxy Server
When an XE IP PBX operates in call-routing model, it is a SIP proxy server which
provides these functions:
z
User-to-user call, in call-routing mode
In call-routing mode, the caller’s SIP proxy server can directly route a call to the called
UA, provided the LS knows about the routing information of the called UA. This
information can be gained either through report from another proxy server or through
interaction with another LS. In this case, the called UA needs not to register with the
caller’s SIP proxy server.
z
Caller identification display