PRI Services
A PRI line is a telephony technology to support voice communications. PRI is a standard interface of Integrated Services Digital Network (ISDN), a telecommunications standard that allows traditional phone lines to carry voice, data and video traffic. Using multiplexing and de-multiplexing technology, a PRI line can deliver multiple lines of voice and data as electrical signals over copper wire. Voice signals on a PRI line must be routed through a traditional telecommunications company. As a higher-capacity service carried on T1 or E1 trunk lines, a PRI line tends to be used by enterprises vs. private individuals.