Patent ID: 6795609
Filing Date: 2004-09-21
Classification: H04B

Abstract:
An apparatus for use in a unidirectional circuit card having an input receive port and an output transmit port, comprising:an output receive port associated with said output transmit port; an input transmit port associated with said input receive port; a unidirectional circuit element connected to said input receive port and said output transmit port; and pass through connection means comprising a passive non-switched fixed path coupling said output receive port to said input transmit port such that signals received from a downstream device at said output receive port are sent unchanged over said passive non-switched fixed path to said input transmit port for transmission to an upstream device thereby enabling the upstream connection of said input transmit port and said input receive port to said upstream device using a first standard duplex connection cable, and the downstream connection of said output transmit port and said output receive port to said downstream device using a second standard duplex connector cable.