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.