I just changed to Asterisk-1.2.1 and Broadvoice was not able to send a call to Asterisk. Outbound calls were OK as well as Registration messages. For some reason, the EXT field in the Broadvoice registration was ignored and instead, the full broadvoice number was used for the extension routing. The problem was solved by adding an entry in extensions.conf for the full number in the proper context, but in the past the EXT field worked. Broadvoice still describes this option in their documentation. I mentioned this since it seemed to work before I upgraded to Asterisk version 1.2.