Let's cover the setup for connecting 3CX to a PSTN line using an analog gateway (Patton SN4114) and then connecting 3CX to a SIP/ITSP line.
The first thing you need to know is that every line or port in 3CX is assigned its very own number, just like the Ring Groups, Digital Receptionists, and Call Queues have their own account number assigned. This makes it easier to route calls using a number.
Let's get started with creating an analog trunk:
The first thing we need to do is start the PSTN Gateway wizard. We can do this in three different ways. It does not matter which method you use as they all start the wizard the same way.