180 self ringback

Ok I’m new to Asterisk and I have an issue with a box that is in production. I’ve done a capture and learned this. The box sends back a 180 ringing immediately after the 100 Trying, and then ignores the 183 Session Progress message.

I’m not really sure what to do from this point. I’ve read a lot of stuff but nothing that gives me much direction.

At this point I don’t even know where to program the logic to handle this. Can someone be of assistance.