Clear-Com EF-701M 4-Wire Interface with Call Signal

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4-Wire Interface with Call Signal, Matrix-to-Partyline 4-Wire Interface with Call Signal, Matrix-to-Partyline The EF-701M interface converts a single channel of standard or TW part yline intercom to four-wire audio, while also converting call signals to RS-422 data (and back). The resulting four-wire audio plus RS-422 data can then be sent to a Clear-Com Matrix port, fiber-optic converter (modem) or connected to another EF-701M over twisted-pair cable such as CAT-5E.Specifications: Clear-Com Format Line Characteristics Max Level Before Clipping: >=20dBu Impedance: >=10KΩ Signalling Receive: =11VDC RTS Format Line Characteristics Max Level Before Clipping: >=20dBu Impedance: >=10KΩ Signalling Tone Send frequency: 20kHz ±1KHz Receive frequency: 20kHz ±500Hz Send level: >=-6dBu Receive level: Show more