Turning headset on and off, Use with desktop telephones, Use with desktop telephone – Sony FR 20 User Manual

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Turning headset on and off, Use with desktop telephones, Use with desktop telephone | Sony FR 20 User Manual | Page 3 / 37 Turning headset on and off, Use with desktop telephones, Use with desktop telephone | Sony FR 20 User Manual | Page 3 / 37
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