I am looking got a list of setting to setup the HG612 or any other third party modem to work with a HH5 Type A. After a morning of googling i have yet to find working informations and just thought you guys would know best.
Plug it in the phone socket instead of the HH5 and plug it into the red WAN socket on the HH5.
Master socket --> Modem --> HH5
What settings do you have in Basic > PTM ?