SIP Request Messages
SIP Request Messages
Supported SIP The VOCAL system supports these SIP request messages:
Request Messages
Table B-1. SIP Request Messages Descriptions
SIP Request | Descriptions |
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Messages |
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INVITE | Indicates that the user or service is being invited to |
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| participate in a session. |
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ACK | Confirms that the client has received a final |
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| response to an INVITE request. |
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BYE | Indicate the user wishes to terminate the call. |
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CANCEL | Cancels a pending request but does not affect a |
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| completed request. |
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REGISTER | Register the address listed in the To header field |
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| with a SIP server. |
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OPTIONS | Queries the capability of the servers. |
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INFO | Allows for the carrying of the session related |
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| control information that is generated during a |
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| session. |
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