A-3
Cisco SIP IP Phone Administrator Guide
Appendix A SIP Compliance with RFC 3261 Information
SIP Responses
2
xx
Response—Successful Responses
3
xx
Response—Redirection Responses
181 Call Is Being
Forwarded
See comments
The Cisco SIP IP phone does not generate these
responses,; however, the phone does receive them. The
phone processes these responses the same way that it
processes the 100 Trying response.
182 Queued
183 Session
Progress
The SIP IP phone does not generate this message. Upon
receiving this response, the phone provides early media
cut-through and then waits for a 200 OK response.
1
xx
Response
Supported?
Comments
2
xx
Response
Supported?
Comments
200 OK
Yes
None
202 Accepted
Yes
None
3
xx
Response
Supported?
Comments
300 Multiple
Choices
Yes
None
301 Moved
Permanently
Yes
302 Moved
Temporarily
Yes
The Cisco SIP IP phone does not generate this
response at this time. Upon receiving this response,
the phone sends an INVITE containing the contact
information received in the 302 Moved temporarily
response.
305 Use Proxy
Yes
The phone does not generate these responses. The
gateway contacts the new address in the Contact
header field.
380 Alternate
Service
Yes