Dialogic 6.2 SIP to Q.931 Conversion

Failover Based on Telephony Cause Codes

November 2009 236

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