A method for maintaining continuity of a network signal path extending along a backplane includes providing a bypass signal circuit compatible with the network signal path and being electrically connected in series with the first and second portions of the network signal path. The bypass signal circuit includes a normally open circuit portion and an electrical contact movable with respect to the bypass signal circuit. An electrical contact is mechanically moved out of contact with the bypass signal circuit and moved mechanically into contact with the bypass signal circuit in response to the function module being detached from or attached to the function module electrical connector and not in response to an electrical control signal.