Appendix A SIP Compliance with
SIP Responses
4xx Response | Supported? | Comments |
|
|
|
411 Length | See comments | This response is only received by the |
Required |
| phone in this release. |
|
| This response indicates that the user |
|
| refuses to accept the request without a |
|
| defined content length. If received the |
|
| phone resends the INVITE request if it |
|
| can add a valid |
|
| field. |
|
|
|
413 Request Entity | See comments | This response is only received by the |
Too Large |
| phone in this release. |
|
| If a retry after header field is contained |
|
| in this response, then the user can |
|
| attempt the call once again in the retry |
|
| time provided. |
|
|
|
414 | See comments | This response is only received by the |
| phone in this release. The user is notified | |
Too Long |
| if this response is received. |
|
|
|
415 Unsupported | See comments | This response is only received by the |
Media |
| phone in this release. The user is notified |
|
| if this response is received. |
|
|
|
420 Bad Extension | See comments | This response is only received by the |
|
| phone in this release. The user is notified |
|
| if this response is received. |
|
| If the phone does not understand the |
|
| protocol extension specified in the |
|
| Require field, the 420 Bad Extension |
|
| response is generated. |
|
|
|
| Cisco SIP IP Phone 7960 Administrator Guide |
|
