Dialogic 6.2 - Manual (Page 236)

Failover Based on Telephony Cause Codes
November 2009 236
SIP to Q.931 Conversion
Table 12 shows the translation performed to create Q.931 codes from
SIP error codes.
Table 12. SIP to Q.931 Conversion
SIP Cause
Code Description Q.931 Cause Code
200 OK 16
400 Bad Request 41
401 Unauthorized 21
402 Payment required 21
403 Forbidden 21
404 Not found 1
405 Method not allowed 63
406 Not acceptable 79
407 Proxy authentication required 21
408 Request timeout 102
409 Conflict 41
410 Gone 22
413 Request entity too long 127
414 Request-URI too long 127
415 Unsupported media type 79
416 Unsupported URI Scheme 127
420 Extension required 127
423 Interval too brief 127
480 Temporarily unavailable 18
481 Call leg/transaction does not
exist
41