Using Callback and DISA

Hi all,
I’m new in FreePBX and Asterisk.
It is possible to use Callback and DISA fonctions on FreePBX with one POTS line (analog public line) allowing users call from outside to call another outside number ?
So that i have one trunk and want users use callback and disa to make outgoing call.

Thanks for your help.

Not with ONLY one POTS line. You need at least 2 channels to do what you’re talking about. Each POTS line has only one channel. A SIP Trunk can handle as many channels as your bandwidth and provider allow.

So, you’d either need 2 POTS lines, or you’d need a POTS line and a SIP Trunk.