{"product_id":"clear-com-ef-701m-four-wire-rs-422-interface-with-call-signal","title":"Clear-Com EF-701M Four Wire RS-422 Interface with Call Signal","description":"\u003cp\u003e4-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 a fiber-optic converter (modem) or transmitted over twisted-pair cable such as CAT-5. Excellent stand-alone two-to-four-wire converter and hybrid null and wide-range level controls. Easily mounted on a utility rack shelf; up to three units will fit across a standard 1-RU rack space. No additional power connection is required, as the EF-701M is powered by the intercom line.\u003c\/p\u003e","brand":"Clear-Com","offers":[{"title":"Default Title","offer_id":48407753300,"sku":"93007","price":733.5,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1203\/4576\/products\/1e3eab0b71b7e2bfdbe51d0f4976f0f8.jpg?v=1502885996","url":"https:\/\/sg-2111.myshopify.com\/products\/clear-com-ef-701m-four-wire-rs-422-interface-with-call-signal","provider":"SG_2111","version":"1.0","type":"link"}