Appendix A SIP Compliance with
SIP Responses
1xx Response—Information Responses
1xx Response | Supported? | Comments | |
|
|
|
|
100 | Trying | Yes | The Cisco SIP IP phone generates this |
|
|
| response for an incoming INVITE. Upon |
|
|
| receiving this response, the phone waits |
|
|
| for a 180 Ringing, 183 Session progress, |
|
|
| or 200 OK response. |
|
|
|
|
180 | Ringing | Yes | None |
|
|
|
|
181 | Call is being |
| The Cisco SIP IP phone does not |
forwarded |
| generate these responses, however, the | |
|
|
| phone does receive them. The phone |
182 | Queued |
| |
| processes these responses the same way | ||
|
|
| |
|
|
| that it processes the 100 Trying |
|
| See comments | response. |
|
|
| |
183 | Session |
| The SIP IP phone does not generate this |
Progress |
| message. Upon receiving this response, | |
|
|
| the phone provides early media cut |
|
|
| through and then waits for a 200 OK |
|
|
| response. |
|
|
|
|
2xx Response—Successful Responses
2xx Response | Supported? | Comments |
|
|
|
200 OK | Yes | None |
|
|
|
| Cisco SIP IP Phone 7960 Administrator Guide |
|
