Charge remote when not in use. Learn controls Plug headset into top of remote. Mutes your voice but not caller's voice. Red light blinks. Transfers call from receiver to headset.
Red light is ON when remote is in use.
Adjusts volume of caller's voice. Press TALK button on remote. If dial tone sounds distorted, see Fine-Tuning section below. DOWN arrow button to decrease volume. Bank of unmarked switches are for engineering tests and should remain in the ON position.