and outgoing lines in communications and electronic systems. Patch panels allow for manually wiring the connections with small cables (patch cords), rather than automatic switching.... Wireless patch panels are also available that provide the cross connections by flipping a switch rather than plugging in wires. See wiring rack and patch cord. Rack Mounted Patch Panels... originally known as the PC bus and then the XT bus. It was later extended to 16 bits and became the AT bus and eventually the ISA bus. See ISA. Micro Channel (MCA) IBM switched...