Library items tagged: ISDN

ISDN Videoconferencing ISDN is a service offered by telephone companies over the circuit switched network to support Voice, Telephone and Data Applications. This document will give an overview of H.320 protocols and outline the procedures for using JVCS-ISDN. Understanding ISDN There are two types of ISDN interface: Primary Rate ISDN (PRI) Interface and Basic Rate ISDN (BRI) interface. A BRI is an ISDN interface that provides two 64Kbps B-channels and one D-channel.