Cisco SIP IP Phone User Manual

A-7
Cisco SIP IP Phone Administrator Guide
Appendix A SIP Compliance with RFC 3261 Information
SIP Header Fields
6xxResponse—Global Responses
SIP Header Fields
6xx Response Comments
600 Busy Everywhere The Cisco SIP IP phone does not generate these 6xx responses. For
an incoming response, the SIP IP phone initiates a graceful call
disconnect.
603 Decline
604 Does Not Exist Anywhere
606 Not Acceptable
Header Field Supported?
Accept Yes
Accept-Encoding Yes
Accept-Language Yes
Allow Yes
Also Yes
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

Cisco SIP IP Phone Specifications

General

Brand	Cisco
Model	SIP IP Phone
Category	IP Phone
Language	English