a Earpiece
b
• Scroll up on the menu.
• Increase the earpiece/speaker volume.
• Access the phonebook in standby
mode.
c
• Delete text or digits.
• Cancel operation.
• Access the redial list in standby mode.
• Change the sound prole during a call.
d
• End the call.
• Exit the menu/operation.
a
c
d
b
g
f
e
h
i
j
k
l
m
n
o
• Press and hold to switch the handset
on or off.
e
• Press to enter a space during text
editing.
• Press and hold to lock/unlock the
keypad in standby mode.
f
• Press and hold to enter a pause when
making a call.
• Switch to upper/lower case during
editing.
g
• Mute or unmute the microphone.
• Access to the answer machine menu in
standby mode (for D455 only).
• Listen to new messages from the
answering machine (for D455 only).
h Microphone
i
• Turn the speaker phone on/off.
• Make and receive calls through the
speaker.
j
• Press and hold to make an intercom
call (for multi-handset version only).
• Set the dial mode (pulse mode or
temporary tone mode).
k
• Scroll down on the menu.
• Decrease the earpiece/speaker volume.
• Access the call log in standby mode.
l
• Make and receive calls.
• Recall key (This function is network
dependent.)
m
• Access the main menu in standby
mode.
• Conrm selection.
• Enter the options menu.