We have 20 DDI/DID numbers, and our ITSP (Digital Realm/Quantum Voice) sends our primary subscriber number in the SIP URI, and the actual DDI/DID number dialed in the sip To: field. I see this has been discussed in XECS-2204, and that it was decided that because the ITSP behavior is incorrect, routing based on DDI numbers in the To: field will not be supported.
I'm not going to be able to get our ITSP to change their behavior, so is there some kind of hack I can do to get sipXecs to route based on the To: field? If there's no way I can do a hack, then either I have to get my ITSP to change the way they work (almost impossible), beg the sipXecs developers to add a check box or some more flexible options to support this faulty behavior, or go back to 3CX (which allows lots of flexibility in how to interpret sip fields, presumably to allow it to work with all the broken SIP implementations out there, which I think is ultimately a good thing for an IP PBX operating in the real world). I know our ITSP are doing it wrong, but there's not a great deal I can do about this. I would really prefer not to go to all the trouble of changing ITSP (porting numbers, renegotiating price-plans etc), so does anyone have any other suggestions other than going back to 3CX?
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