A test fixture interfaces plural units under test (UUTs) with test equipment within a common equipment rack. The test fixture supports a plurality of vertically spaced apart shelf units. A shelf unit has a support surface and an input/output connector panel adjacent thereto, that define a UUT insertion cavity. An input/output connector panel contains cable terminations that terminate cables to various testing equipments. Insertion of a UUT into the insertion cavity places communication ports of the UUT adjacent to cable terminations of the adjacent input/output connector panel. Jumper cables interconnect communication ports of the UUT with cable terminations of the adjacent input/output connector panel.