I would like to set up a home PBX that is INTERNAL only. All of the other tutorials I see include an element of hooking to an outside line. I assume this is to draw the power needed.
I would like to be able to pick up the phone in a room, dial a number (a one or two digit number) and have it ring a specific phone in another part of the house. I understand this would need to be some sort of PBX, but again, I want it to be internal only. I don't want to be able to dial to an outside line and I don't have or want landline service.
Any ideas on equipment needed?