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Appendix A SIP Compliance with RFC-2543 Information
SIP Functions
A-2
Cisco SIP IP Phone 7960 Administrator Guide
78-10497-02
SIP Functions
SIP Methods
Five of the six methods used by the SIP gateway are supported:
Function Supported?
User Agent Client (UAC) Yes
User Agent Server (UAS) Yes
Proxy Server Third-party only
Redirect Server Third-party only
Method Supported? Comments
INVITE Yes The Cisco SIP IP phone supports
mid-call changes such as putting a call
on hold as signaled by a new INVITE
that contains an existing Call-ID.
ACK Yes
None.
OPTIONS No
BYE Yes
CANCEL Yes
REGISTER Yes The Cisco SIP IP phone supports both
user and device registration.