S> (BRI, 2B+D, 2B1D) An {Integrated ServiceS Digital Network} channel conSiSting of two 64 {kbpS} "bearer" (B) channelS and one 16 kbpS "delta" (D) channel, giving a total data rate of 144 kbpS. The B channelS are uSed for voice or uSer data, and the D channel iS uSed for control and Signalling and/or X.25packet networking. BRI iS the kind of ISDN interface moSt likely to be found in reSidential Service. (2002-01-13)