If your CS540 squeals or has static during a call that both you and your caller hear, try re-subscribing the base to the headset.
Manual Over-the-Air Subscription:
1) With your Plantronics CS540 idle and your headset undocked, press and hold the subscription button (Labeled 1) on
the base for three seconds. The Power on/subscription light will flash white.
2) Press and hold the volume up button on the CS540 headset for three seconds until the headset LED
turns solid white. When the Power on/subscription LED on the base becomes solid white, the
headset and base are subscribed to one another.
NOTE: If the subscription process times out after two minutes or if the subscription process
fails, the subscription LED on the base will go dark for three seconds and then re-illuminate
steadily to indicate power is applied to the base. If this occurs, try to re-subscribe the CS540 headset
If the Plantronics CS540 base is in subscription mode and you want to stop the base from searching for a headset,
press the subscription button again. The subscription LED on the base will go dark for three
seconds and then re-illuminate steadily to indicate power is applied to the base.
Power On/Subscription LED
|Power On/Subscription LED
|Primary headset subscription
|Primary headset subscribed to base
|Conference call headset subscription
|Active conference call with guest headsets
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