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EHS (Electronic Hook Switch)
» In addition to audio path, EHS requires some additional cables to carry
signaling between phone and headset base station
» Supported features:
– Phone signals incoming call to headset (beep in headset)
– Headset button allows to send off/on hook command to phone
– Phone signals call active / call inactive to headset, headset will unmute/mute
mic and turn on/off link-LED
» Different EHS versions exist:
– DHSG
– AEI (Avaya Tenovis)
– MSH (Alcatel Lucent)
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