What Is a Pri Phone Service?
PRI phone service is the large-volume phone service of ISDN, or Integrated Services Digital Network. ISDN is responsible for transmitting voice and other data communications in digital form through the same telephone copper wiring of the older analog telephone systems. In order for PRI phone service to work, adapters are located at each end of the communication. The ISDN communication system is used in the United States and in Europe. The phone line connection in the United States uses a T1 system, and the phone line connection in Europe uses an E1 system.
