全部博文（80）
分类： IT业界
2013-01-05 14:35:44
| Request name | Description | Defined in |
|---|---|---|
| INVITE | Indicates a client is being invited to participate in a call session. | RFC 3261 |
| ACK | Confirms that the client has received a final response to an INVITE request. | RFC 3261 |
| BYE | Terminates a call and can be sent by either the caller or the callee. | RFC 3261 |
| CANCEL | Cancels any pending request. | RFC 3261 |
| OPTIONS | Queries the capabilities of servers. | RFC 3261 |
| REGISTER | Registers the address listed in the To header field with a SIP server. | RFC 3261 |
| PRACK | Provisional acknowledgement. | RFC 3262 |
| SUBSCRIBE | Subscribes for an Event of Notification from the Notifier. | RFC 3265 |
| NOTIFY | Notify the subscriber of a new Event. | RFC 3265 |
| PUBLISH | Publishes an event to the Server. | RFC 3903 |
| INFO | Sends mid-session information that does not modify the session state. | RFC 6086 |
| REFER | Asks recipient to issue SIP request (call transfer.) | RFC 3515 |
| MESSAGE | Transports instant messages using SIP. | RFC 3428 |
| UPDATE | Modifies the state of a session without changing the state of the dialog. | RFC 3311 |
