I have a UC540 working over a SIP trunk to Internode. I am having major problems with being able to call forward to any outside number.
I thought this was a natting issue as the UC540 sits behind a C887 router and the router was controlling the nat. I have since added a routed subnet so there is no natting involved on the UC540 or the Router. Still no change to the call forward issue
I have attached a debug of a call coming into the UC540 and the being sent back out with a call forward. On the call forward I get a SIP/2.0 401 Unauthorized.
I have also attached the config of UC540.
125208-0400733889 calls 82365012 which is diverted to 82027371.txt.zip
The problem is there is no Zero, this is the same problem we faced with Internode some time ago, you have to even for local calls sometimes add the STD "0" code in there, just make sure that the leading steering "0" is stripped so the call does not go out looking like "0082027371" there should only be 1 "0" there
Other than that Internet have a robust SIP trunk that works very well
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