A: Yes, but only if you have the AWH-55 plugged into a handset jack. The training adapter will not work if you are using the AWH-55 (or any other system) with one of the Avaya model phones that have a EU24 port and doesn’t need a handset lifter. You would have to unplug the AWH-55 from the headset jack and use it through the handset jack. The Training Adapter will only work plugged into a handset jack on a telephone, it will not work through any of the headset jacks.