I have a client that is currently using an old Avaya Phone system. They want to replace the current system. They have 4 IP Phones, about 20 regular phones and have a Comcast 16 channel PRI.
They'd like to upgrade to 3CX on Windows.
I'm going to build a custom system specifically for the new phone system.
1) Does the new system require any kind of special card (PRI?) if the new system is completely IP phones based?
2) Is a Computer, a POE switch and a bunch of IP Phones all the hardware that is needed?