Plantronics Calisto 620 User Guide - Page 6

Speakerphone Controls 2 3 1 4 5 1 Volume Up/Volume Down Buttons Increase/decrease volume Press up/down volume buttons to desired volume Maximum or minimum volume Hold up/down buttons until max/min reached Ringer volume Press up/down volume buttons while no call is active 2 Pairing LED Flashing Blue/Red In pairing mode; (Pairing mode ends after 10 minutes if unsuccessful) Solid Blue Paired successfully 3 Power LED Two red flashes 30 minutes of talk time remaining Three red flashes 10 minutes of talk time remaining (time to recharge battery) 4 Mute Button Mute microphones (far-end cannot hear 1 short button press mutes mics; Mute LED turns you) solid red Un-Mute microphones 1 short button press un-mutes microphones; Mute LED turns off Reject an incoming call 1 long button press (2 seconds); call rejected 5 Call Button Answer or end a call (PC or Mobile) 1 button press Answer a 2nd call while on a call 1 button press ends first call, 2nd 1 short button press answers 2nd call 6