Plantronics CALISTOPRO User Guide - Page 21

Additional mobile phone/headset features By default, when your headset is within range of your mobile phone, incoming or outgoing mobile calls are automatically sent to the Calisto headset. Therefore, if you cannot hear a call dialed or answered on the mobile phone, the audio is most likely in the Calisto headset. To transfer the audio back to the mobile phone handset, see "Mobile call transfer," below. Voice dialing: If your mobile phone supports voice dialing, to activate this feature on your headset, press and hold the Headset button for 2 seconds. Voice dialing is activated within approximately 4 to 8 seconds. Tip: The Calisto handset does not support voice dialing. Mobile call "reject" feature: When you're using the headset, a triple beep signals an incoming call. To ignore the incoming mobile call, press and hold the Headset button for 2 seconds. Your mobile phone stops ringing. Tip: Unlike mobile calls, landline and VoIP calls cannot be ignored from the headset. Instead, press Ignore (left soft key) on the handset to ignore an incoming landline or VoIP call. Mobile call redial: To redial the last number dialed, press the Headset button twice. Note: The headset redials the last number dialed on your mobile phone only if the headset is within range of the mobile phone. If the headset is within range of the Calisto handset, pressing the Headset button twice redials the last landline number dialed. Tip: It can take from 1 to 6 seconds for a mobile call to be redialed from the headset. Mobile call transfer: At any given time, you can transfer a mobile call from the headset to the mobile handset and back by pressing and holding the Headset button for 2 seconds or until you hear a single high beep followed by a low beep. Mute: To mute a call while on your mobile phone, use the mute feature on your mobile handset. You cannot mute a call using the headset. Page 15