4
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)