2550 Video Phone User Manual IMT
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Using Hard Keys
There is another kind of keys on your 2550 video IP phone, which are called as
“Hard Keys”. The function of these keys is always the same. Please refer to the
table listed below for detailed descriptions of hard keys:
Numeric Keypad (7): Used to input numbers, alphabet, and special
characters like * and #.
Brightness Up (8) and Brightness Down (9): Adjust the brightness of LCD
display by these two keys immediately (If you want to adjust the contract of
LCD display, please refer to chapter 3-5 for detailed instructions).
Redial (10): Press this key to redial the last number dialed.
TV-Out Switch (11): Press this key to toggle TV-out function of this phone.
When TV-out function is activated, nothing will be displayed on LCD display,
and the content of LCD display will be displayed on the TV set connected to
this phone instead. Press this key again to deactivate TV-out function.
Mute Key (12): Press this key to activate mute function. When mute is
activated, remote party will not hear anything from you. Mute key will be
illuminated when mute function is activated, press this key again to
deactivate mute function.
Camera Key (13): Press this key to switch built-in camera on / off. You can
switch camera on or off during a call, so remote party will or will not see
your image. You can also press this call when no call is in progress, and
you can see your own image taken by camera. Camera key will be
illuminated when camera function is activated, press this key again to
switch camera off.
Headset Key (14): Press this key to use headset to make or answer phone
call, a headset must be connected to this phone before you press this key,
or you will not be able to hear anything during the call. Headset key will be
illuminated when headset function is activated, press this key again during
the call to terminate the call, or you can press headset key to transfer the
call to headset when you’re using handset or speakerphone.
