Airespring Trunk

Has anyone had any success setting up Asterisk with a SIP trunk from Airespring? I am running Trixbox 2.8, with Asterisk 1.6, and thought it would be rather simple. It is proving the opposite. No registration is required, so I added a friend peer with the host specified. The PBX sees the INVITE, Sends the 100 Trying, then the 200 OK, and keeps retrying the 200 OK.

They gave us an EdgeMarc 4552 that our PBX is directly connected to, and is where the SIP settings point to.

Airespring and Asterisk work together like they should, so long as the router provided by them is configured correctly. Shouldn’t have lost faith in Asterisk, it was an Airespring problem.