Press headset side of switch. In-use light will blink, then be steady red when ready to use. SuperPro works with your phone, it does not replace it. Hang up receiver when call is finished. If it is blinking, press to cancel.
Caller sounds fainter than usual.
Or reset, using instructions for switching to a new phone. Sound quality depends on the SuperPro being set to an outside line dialtone. Follow Reset Instructions above. It remembers your phone's settings even when changing batteries. In-use light will be a steady red while you are using your SuperPro amplifier.