I have found not much but a few pages, one can be interesting

assuming 192.168.0.4 is the IP address of your AX-112 otherwise change it

http://192.168.0.4/memory.htm
http://192.168.0.4/lanset.htm
http://192.168.0.4/victest.htm see screenshot

the page 'victest.htm' does not seem to show very much interesting stuff
to let this page show interesting stuff follow a few steps:

Code:
Pickup the phone connected to the FXS port, and dial #*112*
it should stay silent, while the line is silent reload victest.htm and you will see a bunch of stuff in the screen (debug etc)
after a while you will hear a stutter tone, at this moment the victest page has become unavailable

original sized screenshot at http://files.wl500g.info/asus/ax112/...12_victest.JPG