Sip messages, Sip configuration task list – H3C Technologies H3C MSR 5600 User Manual
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SIP messages
SIP is a text-based protocol. A SIP message is either a request from a client to a server, or a response from
a server to a client.
SIP requests include INVITE, ACK, OPTIONS, BYE, CANCEL, and REGISTER.
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INVITE—Invites a user to join a call.
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ACK—Acknowledges the response to a request.
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OPTIONS—Queries for the capabilities.
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BYE—Releases an established call.
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CANCEL—Gives up a call attempt.
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REGISTER—Registers with the SIP registrar.
SIP responses indicate the status of a call or registration. Responses are distinguished by status codes. As
shown in
, each status code is a 3-digit integer, where the first digit defines the class of the
response, and the last two digits describe the response message in more detail.
Table 8 Status codes of responses
Code Description Class
100–199
The request was received and is being processed.
Provisional
200–299
The request was successfully received, understood, and accepted.
Success
300–399
A further action needs to be taken to complete the request.
Redirection
400–499
The request contains bad syntax or cannot be fulfilled at this server.
Client error
500–599
The server failed to fulfill an apparently valid request.
Server error
600–699
The request cannot be fulfilled at any server.
Global failure
SIP configuration task list
Tasks at a glance
Configuring SIP UA registration
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(Optional.)
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(Required.)
Enabling a POTS entity to register with the registrar
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(Required.)
Configuring registrar information
(Required.) Use one of the following methods to specify a call destination address for a VoIP entity
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Configuring the call destination IP address for a VoIP entity
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Configuring a VoIP entity to obtain the call destination address from a proxy server
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Configuring the destination domain name and port number for a VoIP entity
(Optional.)