A-11
Cisco SIP IP Phone 7960 Administrator Guide
78-10497-02
Appendix A SIP Compliance with RFC-2543 Information
SIP Header Fields
Authorization
Yes
Call-ID
Yes
Contact
Yes
Content-Encoding
Yes
Content-Length
Yes
Content-Type
Yes
Cseq
Yes
Date
Yes
Encryption
No
Expires
Yes
From
Yes
Hide
No
Max-Forwards
Yes
Organization
No
Priority
No
Proxy-Authenticate
Yes
Proxy-Authorization
Yes
Proxy-Require
Yes
ReBy
Yes
Record-Route
Yes
Require
Yes
Response-Key
No
Retry-After
Yes
Route
Yes
Header Field
Supported?