Basic ISDN Technology Training

This presentation gives a quick overview of the fundamental concepts necessary to understand ISDN PRI (Integrated Services Digital Network - Primary Rate Interface) technology, signaling and general concepts. ISDN PRI is a telecommunications standard that is still widely used around the world (E1 and T1) to transmit voice and data between central offices and PBXs. It is also used to connect older PBXs to VoIP converters.