I am a newbie and I would like to make an PSTN to PSTN gateway.
I assume that this kind of the service can be achieved using Asterisk.
However I am looking for low cost hardware compatible with Asterisk being able to handle 2 normal telephone lines (not ISDN).
Be aware, though, that those boards almost certainly won’t work everywhere in the world. When you’re asking for help with your telephony requirements, you have to say what country you’re in. Different countries have different systems.