There are more SIP response codes than relevant ISDN mappings so translations can result in loss of original response code.
For ISDN-->SIP--->ISDN, this problem can be reduced by using the SIP Reason header ( http://www.rfc-editor.org/rfc/rfc3326.txt ) where a Q.850 cause code can be specified. For example: Reason: Q.850 ;cause=16 ;text="Terminated" regards Attila -----Original Message----- From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of viresh.gu...@airtel.in Sent: 05 March 2010 06:36 To: sip-implementors@lists.cs.columbia.edu Subject: [Sip-implementors] SIP-ISDN mappings 500>127>480 hi, Came to know that 500 on SIP should be implemented as 127 (page-58) on ISDN side but for the reverse mapping 127 is mapped to 480 (page-33). These pages are from " q.1912.5_ww9.doc " downloaded from " http://www.itu.int/itudoc/itu-t/aap/sg11aap/history/q1912.5/q.1912.5.htm l ". This looks very surprising, can someone please explain. Thanks & Regards Viresh Gupta Manager - International Network Planning Enterprise Services, Bharti Airtel Limited, Airtel Center, 4th Floor, Seat No.- C-4259 Plot No.-16, Phase-IV, Udhyog Vihar, Gurgaon, Haryana - 122001, India D (91) 124 4244453 M (91) 9871008236 E viresh.gu...@airtel.in Airtel for Business On your side. By your side. This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies and the original message. Any unauthorized review, use, disclosure,dissemination, forwarding, printing or copying of this email or any action taken in reliance on this e-mail is strictly prohibited and may be unlawful. The recipient acknowledges that Bharti Airtel Limited or its subsidiaries and associated companies(collectively "Bharti Airtel Limited"),are unable to exercise control or ensure or guarantee the integrity of/overthe contents of the information contained in e-mail transmissions and further acknowledges that any views expressed in this message are those of the individual sender and no binding nature of the message shall be implied or assumed unless the sender does so expressly with due authority of Bharti Airtel Limited. Before opening any attachments please check them for viruses and defects. _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
