230714410 TELEPHONY SYSTEMS ( 3 Crd.Hrs )

Pre-Requisites : 230713220

Studies fundamentals of the world wide public switch telephone network. Includes history of the public telephone system, human voice characteristics, twisted pair characteristics, in-band signaling, DTMF signaling, central office switching, trunk circuits, Erlang capacity and blocking probabilities, multiplexing and private branch exchange. Digital telephony, call switching, echo suppression, modems, T1 trunks, SS7 call control protocol, integrated services digital networks (ISDN), digital subscriber lines (DSL) and voice over packet switched networks. Transmission planning. Switching techniques. Traffic theory. Signaling. Switching networks. Digital switching techniques.