I was going through SIP when I got stuck with PRI. Please tell me the exact difference between SPI and PRI to get my concept clear about it, so that I can work on it.
There are two different ways of connecting your business to the network, they are PRI and SIP trunking. They require a piece of equipment in our office called PBX (Private Branch Exchange). Most of PBX can support PRI as well as SIP Trunking, either with an adapter or directly. PRI is it has a guaranteed Quality of Service (QoS).
PRI uses a model called as circuit switched for making voice connections between people.
