Appendix A
Compliance with RFC 3261
Header Field
Referred-By
Referred-To
Remote-Party-ID
Replaces
Requested-By
Require
Response-Key
Retry-After
Route
Server
Subject
Timestamp
To
Unsupported
User-Agent
Via
Warning
WWW-Authenticate
SIP Session Description Protocol Usage
SDP Headers
v—Protocol version
o—Owner or creator and session
identifier
s—Session name
t—Time description
c—Connection information
m—Media name and transport
address
a—Media attribute lines
Supported?
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Supported?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Cisco SIP IP Phone Administrator Guide, Release 6.x and 7.x
SIP Session Description Protocol Usage
A-7