Voice grade patch panels shall be UL listed, meet ANSI/TIA-568-C.2 standards compliance and ANSI/TIA-1096A (formerly FCC part 68) requirements. The printed circuit board will be rated UL 94-V-0. The panels shall be pre-configured for 24 or 48-port mount on a standard 19 in equipment rack and accommodate top, bottom and side cable entry. The patch panels shall be made of 16 ga steel, with a black finish. The panels shall have a 25-pair female Amphenol™ (RJ-21X) connector ON the back.