Trust Control Causes Problems

[journo]

Hi,

I've enabled Trust Ctrl on a number of Yealink T48G phones to block random IP calls. Firmware version 35.72.23.4.

However, I'm currently migrating from an old Asterisk v11 platform to our new v13 platform and now the phones won't register.

The system logs show this:

Jan 25 21:01:46 SIP [666]: SUA <3+error > [000] IP:[OUR SERVER IP IS HERE] is NO found in the dns cache,discard this message!

The only choice I have is to disable the trust control, but that may lead to random calls again which my clients wont be happy with.

Unfortunately, I dont have a phone that I can test with. Only the clients' phones and they wont be letting me take one away for testing.

Any idea what could be causing this?

Thanks
Dan