A PRI is a single line (typically a T1 connection in North America) with 23 voice channels (and a single data/control channel), that allows your business to hold 23 calls simultaneously. PRI Circuits also offer the capacity for voice, data, and fax services.
Dynamic IP, very similar to a PRI, provides a cost-effective solution using VoIP (Voice over Internet Technology) that allows a single circuit for both voice and internet. It is done by alternating between voice and data as the volume changes. As PRI’s are slowly becoming less popular, Dynamic IP is a fantastic alternative.