Call functions34Using In-call optionsDuring a call, press <Options> to access thefollowing options:• Speaker on/Normal: turn on theSpeakerphone feature or switch back toNormal mode.• Switch to headset/Switch to phone:switch the call to a Bluetooth headset orhands-free car kit or back to the phone. Touse this feature, you first need to connectyour headset or car kit to the phone.p. 92• Whisper mode on/Whisper mode off:turn on or off Whisper mode. Whisper modeautomatically increases the microphone'ssensitivity to allow the other person to hearyour voice even though you may bewhispering.• Menu: access the phone's menu functions.• Voice off/Voice on: mute the phone’smouthpiece so that the person you aretalking with is unable to hear you, or unmuteit.• Mute keys/Send keys: turn the key tonesoff or on.• Send DTMF: send DTMF (Dual tone multi-frequency) tones of a specific number as agroup. This option is helpful for entering apassword or an account number when youcall an automated system, like a bankingservice.• Contacts: access the contact list to locate orstore contact information.• End held call: disconnect the call currentlyon hold.To communicate with answering machines orcomputerised telephone systems, Sendkeys must be selected.