[quote=“testshifter”] - This is basically my question since we have an existing PBX, my problem is how to connect/configure asterisk to communicate with our existing PBX?
I believe there are three popular ways to do this.
1 - You can use your existing PBX as a gateway to the PSTN. This MIGHT save you some money, and it can be done, but you are also setting up several failure points and this probably shouldn’t be attempted by a “newbie” in an enterprise environment.
2 - You could buy some other external hardware (a VoIP gateway) to connect the Asterisk to the PSTN. This is only slightly more complicated than option 3 below, but if you can get enough PSTN conversations using option 3, it will probably save you some time and headaches.
3 - You need to buy hardware that installs into your Asterisk box. Digium sells hardware for T1, E1, and POTS. Find out what kind of PSTN connections you have going into your existing PBX, and buy the hardware that supports that protocol for your Asterisk. Once you’ve made it to that point, read up a little more and you’ll probably have your answer.