Abstract: A triaxial contact assembly for terminating a screened twisted pair of wires comprises three contact members (12,14,16) and a ferrule (18). The inner contact (12) is of conventional construction but the intermediate contact member (14) consists of an intermediate contact (20) to which are secured the inner insulator (34) and a spacer member (40). The outer insulator (54) is fixed to the outer contact (52). The number of separate components required to be assembled by the operator is thus reduced and assembly made quicker and easier.

Abstract: A communication system comprises a plurality of subscriber stations (51-1 to 51-n) each of which comprise a transmitter (3) and a receiver (4). A switching network comprising a selection switch (57) and a synchronous digital switching network (60) is connected to the subscriber stations (51-1 to 51-n) via separating and combining circuits (52-1 to 52-n) each of which comprise a transmitter (3) a receiver(4) and an interface unit (55). The transmitter (3) transmits a signal comprising a square wave frequency modulated signals which is modulated by a wideband (video) signal, on transitions of which short or long pulses are initiated in response to a data signal. The wideband and data signals are separated in the separating and combining circuits (52-1 to 52 -n) to enable the wideband and data signals to be separately processed in the switching networks (57,60).