Ongoing Reinvites

It’s recently become the case to our asterisk box, that when dialing 800 numbers asterisk sends out re-invites throughout the entire call process. Resulting in ringing for awhile, and then going busy.

However this isn’t the case on any other phone call, just 800 numbers. Any advice on how to continue to troubleshoot? I’m somewhat new to the asterisk system but fairly well rounded with linux, so getting around isn’t an issue. I just don’t know specifically what I should be looking for.

I’m running v1.6.2.13, but have noticed several posts mentioned “mediaredirect” or something along those lines, essentially the replacement for the “canreinvite” command.

Do you have a different SIP peer that handles 800XXXXXXX calls from other calls?