A continuación se muestran los errores que se pueden producir en los mensajes SIP de manera más detallada explicando la causa concreta del error:
Como se ha indicado anteriormente corresponde con las respuestas de la clase:
4xx - Respuestas de fallo de método.
5xx - Respuestas de fallos de servidor.
6xx - Respuestas de fallos globales.
Estos errores se corresponden con los mensajes de error Q.931 o DSS1 y suponen el mapeo de los eventos SIP con lós códigos de error de la RTC (Red telefónica conmutada)
| Evento SIP |
Valor decimal (DSS1) |
Valor hexadecimal (DSS1) |
Valor transmitido en el canal D |
Detalle |
| 400 Bad request |
127 |
7f |
ff |
Interworking, unspecified |
| 401 Unauthorized |
57 |
39 |
b9 |
Bearer capability not authorized |
| 402 Payment required |
21 |
15 |
95 |
Call rejected |
| 403 Forbidden |
57 |
39 |
b9 |
Bearer capability not authorized |
| 404 Not found |
1 |
01 |
81 |
Unallocated (unassigned) number |
| 405 Method not allowed |
127 |
7f |
ff |
Interworking, unspecified |
| 406 Not acceptable |
127 |
7f |
ff |
Interworking, unspecified |
| 407 Proxy authentication required |
21 |
15 |
95 |
Call rejected |
| 408 Request timeout |
102 |
66 |
e6 |
Recover on Expires timeout |
| 409 Conflict |
41 |
29 |
a9 |
Temporary failure |
| 410 Gone |
1 |
01 |
81 |
Unallocated (unassigned) number |
| 411 Length required |
127 |
7f |
ff |
Interworking, unspecified |
| 413 Request entity too long |
127 |
7f |
ff |
Interworking, unspecified |
| 414 Request URI (URL) too long |
127 |
7f |
ff |
Interworking, unspecified |
| 415 Unsupported media type |
79 |
4f |
cf |
Service or option not available |
| 420 Bad extension |
127 |
7f |
ff |
Interworking, unspecified |
| 480 Temporarily unavailable |
18 |
12 |
92 |
No user response |
| 481 Call leg does not exist |
127 |
7f |
ff |
Interworking, unspecified |
| 482 Loop detected |
127 |
7f |
ff |
Interworking, unspecified |
| 483 Too many hops |
127 |
7f |
ff |
Interworking, unspecified |
| 484 Address incomplete |
28 |
1c |
9c |
Address incomplete (invalid number format) |
| 485 Address ambiguous |
1 |
01 |
81 |
Unallocated (unassigned) number |
| 486 Busy here |
17 |
11 |
91 |
User busy |
| 487 Request cancelled |
127 |
7f |
ff |
Interworking, unspecified |
| 488 Not acceptable here |
127 |
7f |
ff |
Interworking, unspecified |
| 500 Internal server error |
41 |
29 |
a9 |
Temporary failure |
| 501 Not implemented |
79 |
4f |
cf |
Service or option not implemented |
| 502 Bad gateway |
38 |
26 |
a6 |
Network out of order |
| 503 Service unavailable |
63 |
3f |
bf |
Service or option unavailable |
| 504 Gateway timeout |
102 |
66 |
e6 |
Recover on Expires timeout |
| 505 Version not implemented |
127 |
7f |
ff |
Interworking, unspecified |
| 580 Precondition Failed |
47 |
2f |
af |
Resource unavailable, unspecified |
| 600 Busy everywhere |
17 |
11 |
91 |
User busy |
| 603 Decline |
21 |
15 |
95 |
Call rejected |
| 604 Does not exist anywhere |
1 |
01 |
81 |
Unallocated (unassigned) number |
| 606 Not acceptable |
58 |
3a |
ba |
Bearer capability not presently available |
