Cisco SIP IP Phone - Appendix A SIP Compliance with RFC 3261 Information; SIP Functions

A-1
Cisco SIP IP Phone Administrator Guide
APPENDIX A
SIP Compliance with RFC 3261 Information
This section describes how the Cisco SIP IP phone complies with the IETF definition of SIP as described
in RFC 3261.
This section contains compliance information on the following:
• SIP Functions, page A-1
• SIP Methods, page A-2
• SIP Responses, page A-2
• SIP Header Fields, page A-7
• SIP Session Description Protocol (SDP) Usage, page A-8
• Transport Layer Protocols, page A-9
• SIP Security, page A-9
• SIP DTMF Digit Transport, page A-9
SIP Functions
Function Supported?
User agent client (UAC) Yes
User agent server (UAS) Yes
Proxy server Third-party only
Redirect server Third-party only