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optiPoint 500 economy/basic/standard/advance
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Switching to Speakerphone Mode

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This function is not available with optiPoint 500 economy and optiPoint 500 basic. 

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Step by Step
 

Precondition: You are conducting a call with the handset. 

and

Hold down the key and replace the handset.
(in the U.S.: press the key once and replace the handset). Then release the key and continue the call. 



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