SIP Trunk Provider says UC520 replying with "500 internal server error" in response to inbound call

[mcastrigno]

I am trying to set up a SIP trunk DID. The calls do no go through, when a trace is performed the SIP Trunk Provider says UC520 replying with "500 internal server error" in response to inbound call.

Is this a generic message that has lots of possible sources or can this tell me anything?

thanks

[bross]

This issue has been RESOLVED, the problem was on the ITSP side, they gave me the wrong DID.. However, while trying to troubleshoot this I reset the UC540 to default, and rebuilt using the CLI instead of CCA 2.2.2, and at this point I don't have any access-lists in place. I'm going to save this config and start from default again and build with CCA to see if I get the same results.. Thanks to folks who offered suggestions.

Barry

[RevyTagle3699]

I have this SIP/2.0 500 internal server error. Incoming call service will normalize after power reboot.

I need help on this problem.