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Clear-Com | EF-701M Four Wire RS-422 Interface with Call Signal | Clear-Com

4-Wire Interface with Call Signal, Matrix-to-Party-line. The EF-701M interface connects one channel of standard or TW party-line intercom to four-wire audio, and simultaneously converts either the DC-voltage call signal or 20kHz call signal to RS-422 data (and back). The resulting four-wire audio plus RS-422 data can then be sent to...