(BRI) A kind of Integrated Services Digital Network channel consisting of two 64 Kbit per second "bearer" (B) channels for user-data transfer plus a 16 kbps "delta" (D) channel for control and signaling information. A BRI provides a total data rate of 144 kilobits per second. The B channels are used for voice or data, and the D channel is used for signaling and/or X.25 packet networking. BRI is the kind of ISDN interface most likely to be found in residential service.
(28 Nov 1994)