Plantronics CS50 and CS55 Troubleshooting:
STEP 1: SYSTEM RESET
A.) Press both the talk button and the mute control button on the headset simultaneously for 10 seconds. When the talk indicator light on the headset blinks, release both buttons.
B.) Press the talk button again and then release.
C.) Disconnect the AC power adapter from the AC power outlet and leave it unplugged for 10 seconds, then reconnect.
The system reset operation is now complete. If your CS50 or CS55 problem has now been resolved, there’s no need to go on to Step 2 below. If your CS50/CS55 problem still exists, please continue to the Subscription Reset operation below.
STEP 2: SUBSCRIPTION RESET
A.) Place the headset into the base charging cradle and be sure that it is pressed down and seated all the way in the charger.
B.) Press and hold both of the talk volume fine tune buttons on the back of the base (the buttons marked “+” and “-“) simultaneously for a minimum of 10 seconds. The power indicator light on the base will flash red and you can release the buttons.
C.) Next, push and hold the mute control button on the headset for a minimum of 5 seconds. The talk indicator on the headset will light up green.
Successful re-subscription is indicated when the power indicator on the base is fully illuminated and the talk indicator light on the headset is off.
D.) To complete the process, disconnect the AC power adapter from the AC power outlet and leave it unplugged for 10 seconds, then reconnect.
If your problem still persists after performing the System Reset and the Subscription Reset, try again or call Plantronics Tech Support at (800)544-4660 extension 5538.