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2 Wideband/narrowband audio switch
The CS510A/CS520A has wideband audio, which allows speech to sound clearer and more
natural. If your desk phone is capable of wideband audio, set the wideband-narrowband audio
switch to yellow for wideband.
NOTE: Talk time will be reduced when operating in wideband mode.
Set the switch to black (narrowband) for longer headset battery life or to increase the number
of systems that can work in a small area.
3 Auto answer switch
Auto answer saves a button press to establish the radio link between headset and base. When auto
answer is set to black, you must press the headset call control button to answer an incoming call.
When auto answer is set to grey, you can answer a call just by lifting the headset from the base.
NOTE Auto answer/end capability requires the use of an EHS cable or HL10 lifter. Visit
plantronics.com/accessories for more information.