On Wed, Aug 12, 2009 at 10:07 AM, Matt White<[email protected]> wrote: >>Regardless of which ITSPs support it, it is a requirement of the >>offer-answer model that re-invite with no SDP attribute return an >>offer. This offer can be the same as the original offer but it is a >>protocol error to return OK with no SDP body. >> >>Note (thanks to Dale for digging this out for me) : >> >>RFC 3261, section 13.2.1, especially: >> Concretely, the above rules specify two exchanges for UAs compliant >> to this specification alone - the offer is in the INVITE, and the >> answer in the 2xx (and possibly in a 1xx as well, with the same >> value), or the offer is in the 2xx, and the answer is in the ACK. >> All user agents that support INVITE MUST support these two exchanges. >> >>I have to say it is not a valid argument to state that it is OK to >>make this error because Verizon "and other DID providers" do. >> >>I have some code to try to compensate for this particular error. It >>has not been my priority to make this hack work. If you wish you can >>supply your SIP credentials and I can try to get it to work on 4.1 as >>time permits. >> >>Regards, >> >>Ranga. > > Thanks Ranga, I will pass your comments to Bandtel. We have decided to move > the customer from Bandtel, we used them alot in the past but have been less > than happy for the last few implementations. Typically we use ingate devices > but with 4.x release we are now using sipxbridge for our more budget aware > customers. > > Bandwidth.com does not service are area...do you have any thoughts on Voxitas > or other trunk provider that you have good consistent results with sipxbridge? > > -M
I dont have a lot of first hand experience (other than testing). AT&T was excellent. Voxitas worked OK. cbeyond worked ok. voip.ms worked well (low cost and quite good). les.net works for me but I don't know if it would work well for you ( its low cost but I have read some not so good comments on other lists about them). voipuser.com is questionable. It would be good to ask the list for suggestions ( and I see you already have ). Skype is going to join the list ( we have a template for them ). When the go public you can try them. Regards 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/
