DIAL-OPERATED PBX EXCHANGE

摘要

"Dial-Operated PBX Exchange": Selector modules (multiplexers M1 - M8) formed as integrated modules using C-MOS-technology are used for the switching network which permits full accessibility between lines and stations via electronic crosspoints. Via individual selector lines specified by an appropriate drive address from a control computer unit (ST), individual subscribers (T0 - T5) in the case of internal traffic are to be connected, and in the case of external traffic any subscribers are to be connectable to any exchange line (Ltg1, Ltg2). The switching network (KF) is electrically isolated from other functional units by transformers (Ue1 - Ue8) in the subscriber circuits (TA0 - TA5) and in the exchange sets (AS1,AS2). Central units (audible tone receivers, tone generators) are connected via free selector lines of the multiplexers. (Figures 1a and 1b)