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communications, standard (Formerly "RS-485") An EIA
serial line standard which specifies 2-wire,
communications. Maximum cable length is 1200m. Maximum data
rates are 10Mbps at 1.2m or 100Kbps at 1200m. EIA-485 can
implement a truly multi-point communications network, and
specifies up to 32 drivers and 32 receivers on a single
(2-wire) bus.