... .568A/B Compatible.for 19" wide racks.48 Ports available WIRING BLOCK PANELBlack painted steel panel.Numbered ports.White blanks for ... wired together internally. When a patch bay has half-normal wiring, its switching contacts flow through the bottom jacks of the ... digital video and audio, as well as RF (cable TV), MIDI, telephone, networking, electrical, and just about anything else.Switching equipment ...