On Sun, Jul 26, 2009 at 9:19 AM, Kim Culhan<[email protected]> wrote: > I'm posting this to the list for anyone interested in interoperating with > the itsp Teliax and to mention the observed sip exchange behaviour. > > After sipXecs completes a sip registration with Teliax the itsp, the > itsp immediately sends a > sip message with Method: OPTIONS > > sipXecs responds to that message with a message including: > > Status-Line: SIP/2.0 406 Not acceptable > > It has been stated that this is the desired behaviour as the itsp's > sending of the message > with OPTIONS occurs out-of-dialog and is therefore Not acceptable. > > The interoperation with the itsp is functional in that call completion > is possible. > > The exchange consisting of the sending of OPTIONS and the reply of 406 > is continuous > with the itsp resending the OPTIONS message after a delay of > approximately 6 seconds > after sipXecs has sent the preceding 406 reply. > > regards > -kim
To explain this behavior of sipxbridge: If the endpoint that teliax were sending the options to were a SIP Phone, then the SIP phone would answer with a 200 OK to the options and with an sdp corresponding to the supported codecs. However, sipxbridge is not a sip phone but rather a B2BUA. Hence it does not make any assumptions about "supported codecs" these are negotiated end to end by the sip phone and the ITSP when call setup occurs. Thus, SipXbridge returns the NOT ACCEPTABLE. Teliax is not the only ITSP that sends OPTIONS. As you note, that does not affect call setup behavior and can hence be safely ignored. Do consider sharing your settings for teliax so it can be included in the list of interoperable ITSPs. To do so, you can send the file /etc/sipxpbx/sipxbridge.xml after editing out any sensitive information such as password and user name. I will update the list of interoperable ITSP on the wiki. Ranga > > -- > _______________________________________________ > sipx-users mailing list [email protected] > List Archive: http://list.sipfoundry.org/archive/sipx-users > Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users > sipXecs IP PBX -- http://www.sipfoundry.org/ > -- M. Ranganathan _______________________________________________ sipx-users mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-users Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users sipXecs IP PBX -- http://www.sipfoundry.org/
