| http://www.w3.org/ns/prov#value | - A modulator and demodulator (MODEM) communication system comprising:telephone line means, having a telephone line, for carrying signals; a central station including a MODEM and operatively connected to said telephone line through said MODEM; and, one or more local stations each including another MODEM, and each operatively connected to said telephone line through said another MODEM and to said cen
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