Palm Treo 755P Guía De Referencia Rápida página 31

Replaces the Spkr-phone button when a Bluetooth hands-free
device, such as a headset or car kit, is attached. Select this
button to transfer the call from the Bluetooth hands-free device
to the built-in earpiece on your smartphone.
Places the current call on hold.
Enables you to make another call while the first call is on hold.
For information on handling a second outgoing call, see the
User Guide.
Opens the Dial Pad so you can manually enter additional
numbers, such as an extension or a response to a voice
prompt.
Dials any extra digits (such as a password or an extension) that
you assigned to a favorite button. This button replaces the Dial
Pad button during outgoing calls to numbers that include
predefined extra digits. See "Defining favorite buttons" on
page 32 for information on defining extra digits.
Mutes the microphone so that you cannot be heard.
NOTE If the screen dims during a call, press any key except Power/End to return the screen to normal brightness. Be
careful not to press Power/End to wake up the screen because this will accidentally end the call.
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