Just setup my Issabel PBX server, with TDM410P PSTN Card (2 - Fxo's & 2 - Fxs's)
every thing works fine when the setup connected to land phone line.
But when i connected the telephone line (RJ11 Line) got from Huawei B315 4G Router to Fxo port it doesn't work. How to troubleshoot this?
(Are there any additional configurations for telephone lines connected via 4G routers?)
