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???? ??? ?????? ??? ????? ???? ?????? ?????? ??????? ?? ???? ?????? ?? ???? ????? ????? ????? ????? ????? ???? ?????? ??????? ??????? ???? ????????? ??? ????????????? ????? ????? ?????. ??? ?????? ???? ????? ????? ?????? ????? ?????? ????? ??????? ??????????? ??????????? ???? 24 ???? ???? ?????? ????? ??? ?? ?????? 5 ?????? ????? ??? ????? ??????? ???? ?????? ????????? ?????? ?? ??????? ????????. ?????? ??????? ????? RJ45 ????? ?????? ?????? ?????? ?????? ???????? ?? ????? ??????.
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GB 18802.1-2011; GB/T 18802.21-2004
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