Plantronics Calisto Pro Series - Manual (Page 21)

Page 15
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  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  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  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.