what does pri mean in telephony language
exists and is an alternate of . A PRI (Primary Rate Interface) is a telecommunication standard used in the Integrated Services Digital Network or ISDN, for carrying multiple DS0 voice and data transmissions between two physical locations. PRI was developed specifically for industrial or large quantity users. PRI is an industrial ISDN line while the Basic Rate Interface, or BRI, is used to cater to home and small enterprises. Both Primary Rate Interface and Basic Rate Interface are made up of a number of B channels and D channels. B Channel or the Bearer Channel is used for data transmission, including voice, and D channel is meant for signaling and control.