Cisco SIP IP Phone - SIP Session Description Protocol (SDP) Usage

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Cisco SIP IP Phone Administrator Guide
Appendix A SIP Compliance with RFC 3261 Information
SIP Session Description Protocol (SDP) Usage
SIP Session Description Protocol (SDP) Usage
Proxy-Authorization Yes
Proxy-Require Yes
Record-Route Yes
Referred-By Yes
Referred-To Yes
Remote-Party-ID Yes
Replaces Yes
Requested-By Yes
Require Yes
Response-Key No
Retry-After Yes
Route Yes
Server Yes
Subject No
Timestamp Yes
To Yes
Unsupported Yes
User-Agent Yes
Via Yes
Warning Yes
WWW-Authenticate Yes
SDP Headers Supported?
v—Protocol version Yes
o—Owner or creator and
session identifier
Yes
s—Session name Yes
t—Time description Yes
c—Connection information Yes
Header Field Supported?