YD/T 1006-1999.A simultaneous voice plus data modem, operating at a voice plus data signalling rates of 4 800bit/ s, with optional automatic switching to data-only signalling rates of up to 14 400bit/s, for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits.YD/T 1006规定用于公用电话交换网和点对点二线租用电话型电路上的调制解调器。该调制解调器...................
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