Plantronics Calisto User Manual page 60

DRAFT
Powering the Headset On and Off
You must turn on the headset before first use and anytime after it has
been powered off.
Powering your headset on
Press and hold for 2 seconds until the
indicator light flashes blue every 10
seconds or you hear 4 ascending beeps
Powering your headset off
Press and hold the Headset
indicator light flashes red for 4 seconds or you hear 4 descending
beeps.
TIP: It is not necessary to power off your headset between uses. When you
are not using your headset, you can simply store it on the charging base.
However, you may want to power off your headset if you are using it away
from home and want to save battery power.
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button for 4 seconds until the