Q.850 to SIP Mapping Table
Below is the Cause Code Reroute table supporting Q.850 - SIP mapping to support RFC4497.
The N/A entry in the SIP Response Code field indicates 500.
Figure : Q.850 to SIP Reroute Codes SIP Response Code Figure : SIP to Q.850 Reroute Codes
Q.850 Cause Code Reason 1 Unallocated Number 404 2 no route to network 404 3 No route to destination 404 4 send special information tone N/A 5 misdialled trunk prefix N/A 6 Channel unacceptable N/A 7 Call awarded and being delivered in an established channel N/A 8 pre-emption N/A 9 pre-emption circuit reserved for reuse N/A 13 no circuit available in the transit network N/A 14 reselection in the transit network applying load sharing N/A 15 redirection to announcement machine N/A 16 Normal Call clearing 500 17 User busy 486 18 No user responding 408 19 No answer from the user 480 20 subscriber absent 480 21 Call rejected 603/403 22 number changed (w/o diagnostic) 301/410 22 number changed (w/ diagnostic) N/A 23 Redirection to new destination 410 24 Call Rejected due to feature at the destination N/A 25 exchange routing error N/A 26 Non-selected user clearing N/A 27 Destination out of order 502 28 invalid number format(Address incomplete) 484 29 Facility rejected 501 30 Response to status enquiry N/A 31 Normal unspecified 480 34 resource unavailable(No circuit available) 503 38 Network out of order 503 41 Temporary failure 503 42 Switching equipment congestion 503 43 Access information discarded N/A 44 Requested channel not available N/A 46 Precedence call blocked N/A 47 Resource unavailable, unspecified 503 49 QoS unavailable N/A 50 requested facility not subscribed N/A 53 outgoing calls barred within CUG N/A 55 Incoming calls barred within CUG 403 57 Bearer capability not authorized 403 58 Bearer capability not presently available 503 62 inconsistency in designated outgoing access information and subscriber class N/A 63 Service/option not available N/A 65 Bearer capability not implemented 488 66 Channel type not implemented N/A 69 Requested facility not implemented 501 70 Only restricted digital information bearer capability is available 488 79 Service or option not implemented 501 81 Invalid call reference value N/A 82 Identified channel does not exist N/A 83 Suspended call exists, but this call identity does not N/A 84 Call identity in use N/A 85 No call suspended N/A 86 Call having the requested call identity has been cleared N/A 87 User not member of CUG 403 88 Incompatible destination 503 90 non-existent CUG N/A 91 Invalid transit network selection N/A 95 Invalid message N/A 96 Mandatory information element is missing N/A 97 Message type non-existent or not implemented N/A 98 Message not compatible with call state or message type non-existent or not implemented N/A 99 Information element non-existent or not implemented N/A 100 Invalid information element non-existent or not implemented N/A 101 Message not compatible with call state N/A 102 Recovery of timer expiry 504 103 parameter non-existent or not implemented, pass on N/A 110 Message with unrecognized parameter, discarded N/A 111 Protocol error N/A 127 Interworking unspecified N/A
SIP Response Code Reason Q.850 Cause Code 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 102 410 Gone 22 411 Length required 127 413 Request Entitiy too long 127 414 Request-uri too long 127 415 Unsupported media type 79 416 Unsupported URI scheme 127 420 Bad Extension 127 421 Extension required 127 423 Interval too brief 127 480 Temporarily unavailable 18 481 Call/Transaction does not exist 41 482 Loop Detected 25 483 Too many hops 25 484 Address incomplete 28 485 Ambiguous 1 486 Busy here 17 487 Request terminated N/A 488 Not acceptable here 65 491 Request pending 21 493 Undecipherable 21 500 Server Internal Error 41 501 Not Implemented 79 502 Bad Gateway 38 503 Service Unavailable 41 504 Server timeout 102 505 Version not supported 127 513 Message too large 127 580 Precondition failure 41 600 Busy Everywhere 17 603 Decline 21 604 Does not exist anywhere 1 606 Not acceptable 31
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