Failover Based on Telephony Cause Codes

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

Description

Q.931 Cause Code

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

41

 

exist

 

 

 

 

November 2009

236

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Dialogic 6.2 manual SIP to Q.931 Conversion SIP Cause Description, November 236