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4.3.5 Off-hook Key
This key is used for answering an incoming call, or dialing a number either directly from the idle,
or from the contact list, call list, or central directory. Pressing this key in idle opens the call list.
4.3.6 On-hook, and On/Off Key
The On-hook key is used for disconnecting calls, and returning to the previous menus when
navigating in any menu. A long-press in idle will switch the handset off, and a long-press when the
handset is switched off will switch the handset on.
4.3.7 Speed Dial Keys
Any key from “2” – “9” can be set as a speed dial key. A long press on any of these numbers when the
handset is in idle can be set to a short cut to calling any contact in the contact list, or in the F-Key list.
For additional information on this feature see 7.1.4 Speed Dial/On Touch Dial.
4.3.8 Volume Button
These two volume buttons placed on the upper left side of the handset are used for
increasing/decreasing the volume during a call.
NOTE: These buttons are used to control the volume when using the earpiece, a headset, and the
loudspeaker, and the lowest volume will not mute the handset.
4.3.9 Mute Button
The mute button is placed under the volume buttons on the left side of the handset. This button is
used during call to mute the call so that the microphone in the handset is turned off, and the
counterpart cannot hear you, but you are still able to hear the counterpart of the call.
When the mute function is enabled during a call it is indicated on the “Connected” screen with the
image of the handset that is red as seen above. Mute is turned off by pressing the mute button again.
Furthermore, a press on the mute button when the handset is in idle will activate the “Push To Talk”
function; for further information on this feature see section 6.5.15 Push To Talk.
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