when you use a headest on a Legend you must have at at least a Plantronic M12 lt plugs into where your handset cord is now, your handset & headset into your M12 base unit, to work properly you need to program 2 buttons on your phone .
system program
centralized tel programming
ext #
touch buttom
list features
Headset
headset hang up ,enter
next button then headset status, you can make it work with just a status , but you then have to remove your handset every time, if you want to anser without touching a button you can also program headset auto answer