I think we've established that the device is misbehaving. The only thing I have to wonder about is if the device receives the final 200 OK in the original REG dialog. If it doesn't then I could imagine it "trying harder" by sending registrations to other IP/port combos. (I don't condone that behavior, just that I understand why a device might do that.)

Can you get a SIP trace from the device that is attempting to register? It would be extremely helpful for you to see what that device is seeing.

-MC


On Fri, Apr 26, 2013 at 10:41 AM, pratham2013 <manish.khilwani@gmail.com> wrote:
Hello Sean,

If it is issue with router then it also should not work for the voip.ms
account. I can register extension voip.ms but not with my server.

Is there anything else do you know which adding port twice in contact
header?

Thanks
Manish Khilwani



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