Hello:

dswartz: There's about a 30sec pause of dead air (and I can see incoming SIP transactions from various IPs with the callerID info) then it cuts to a normal fast busy.

Fisamo:
I have tried it with the format described and without the /{DID} at the end. It did not appear to change things except without the DID at the end, I got "Ignoring this INVITE request". I have two inbound routes in place, one for anyDID/anyCID and one for the number assigned to me by VOIPo. Both of them have a target of Extension 200.

scott2020:
That might be the case, but what's really throwing me for a loop is that I plug my cred. into X-Lite or into my Wifi phone connected to the network (not through Asterisk) and both of them can send and receive calls without issue. Now an odd thing is that for the Zyxel wifi phone, I can't use hostnames so I have to use IP addressess, but I have never had a problem with its functionality.

Curiouser and curiouser...

Don't worry about insulting my intelligence, if you have something you want me to try, then by all means speak up. Chances are, you're thinking of something I'm missing or have easily overlooked.