I spent an hour or more hacking the Linksys PAP2 box that used to be used with Vonage. The box has been collecting dust in my office after being “pulled from service” months ago. So really I had nothing to lose if I broke it.
Popping the lid showed me a spot on the PC board where a reset switch was planned but never added. Shorting these leads caused the box to apparently reset itself (duh!). It still got me no closer to unlocking it, though. I’m not sure what a reset gets you.
I was able to locate new firmware for flashing, but no way to really flash it. I tried feeding it a custom XML config file but didn’t get too far with that, either. In spite of these obstacles, I do feel I’m getting closer to making this box useful again by getting it connected to Asterisk.