SIP Response Code | SIP Meaning | ISDN Cause Code | ISDN Meaning |
---|---|---|---|
400 | Bad Request | 41 | Temporary Failure |
401 | Unauthorized | 21 | Call Rejected |
402 | Payment Required | 21 | Call Rejected |
403 | Forbidden | 21 | Call Rejected |
404 | Not Found | 1 | Unallocated / Unassigned Number |
405 | Method Not Allowed | 63 | Service or Option Unavailable |
406 | Not Acceptable | 79 | Service / Option Not Implemented |
407 | Proxy Authentication Required | 21 | Call Rejected |
408 | Request Timeout | 102 | Recovery On Timer Expiry |
410 | Gone | 22 | Number Changed (no diagnostic) |
413 | Request Entry Too Long | 127 | Interworking Unspecified |
414 | Request URI Too Long | 127 | Interworking Unspecified |
415 | Unsupported Media Type | 79 | Service / Option Not Implemented |
416 | Unsupported URI Scheme | 127 | Interworking Unspecified |
420 | Bad Extension | 127 | Interworking Unspecified |
421 | Extension Required | 127 | Interworking Unspecified |
423 | Interval Too Brief | 127 | Interworking Unspecified |
480 | Temporarily Unavailable | 18 | User Not Responding |
481 | Call Transaction Does Not Exist | 41 | Temporary Failure |
482 | Loop Detected | 25 | Exchange Routing Error |
483 | Too Many Hops | 25 | Exchange Routing Error |
484 | Address Incomplete | 28 | Invalid Number Format |
485 | Ambiguous | 1 | Unallocated / Unassigned Number |
486 | Busy Here | 17 | User Busy |
500 | Server Internal Error | 41 | Temporary Failure |
501 | Not Implemented | 79 | Service / Option Not Implemented |
502 | Bad Gateway | 38 | Network Out of Order |
503 | Service Unavailable | 41 | Temporary Failure |
504 | Server Timeout | 102 | Recovery On Timer Expiry |
505 | Version Not Supported | 127 | Interworking Unspecified |
513 | Message Too Long | 127 | Interworking Unspecified |
600 | Busy Everywhere | 17 | User Busy |
603 | Decline | 21 | Decline |
604 | Does Not Exist Anywhere | 1 | Unallocated Number |
All other codes | 31 | Normal Unspecified |