Line Access apparatus.

摘要

Line access apparatus (10) includes a line coupler that functions as a high voltage isolation device whereby low voltage large scale integration circuitry can be used to provide a multiplexer/demultiplexer (16) that is physically small, inexpensive and reliable. The apparatus comprises a plug (18) adapted to be inserted between the protector block of the main distribution frame (42) and a plurality of high voltage protectors. The plug includes a plurality of pins (20) of which each pin is intended to bridge a respective line pair. With the pins (20) are associated piezoelectric devices (24) each serving as both a high voltage-isolating device and a signal coupler.