I used these instructions:
OBi302 Note: To access the integral web page via the WAN port, you may need to enable WAN access. To do this, from the connected phone dial ***0. Next, enter 30# - Press 1 to enter a new value - Press 1# to enable - Press 1 to save.
from
https://www.obitalk.com/forum/index.php?topic=9.0Then I copied my settings from a Obi100 device that was setup for Asterisk. I was then able to use Obi302 with Asterisk. This method may allow you to use the device with other carriers too. The tricky part was getting the management webpage. Thanks to ShermanObi.