High data rate interconnecting device

Interconnect apparatus for a communication path for data signals in a predetermined frequency band, comprising: a) a first and second sections of a transmission line connected at one end to a transceiver first and second data devices, respectively ; b) a switch, having conductive / non-conductive states, for connecting / disconnecting between the other ends of said first and second sections to provide a communication path between said transceiver devices while in conductive state; c) a third and fourth sections of a transmission line, each connected at one end to a contact of said switch and the other end to a first and second connectors respectively; d) compensation circuitry to compensate, within that frequency band, parasitic effects caused by the switch and / or cable, while the switch is in a state of driving or while the switch is in its nonconducting state, such that said compensation circuitry compensates the influence of parasitic effects introduced along said communication path by said switch while in nonconductive state and while a cord having predetermined characteristics is a part of said communication path or However, by combining said third and fourth sections and said connectors while the switch is in conductive state.