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C4220+
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C4220+
Digital Clarity Power
TM
Technology
With Digital Clarity Power, high frequency sounds
are amplified more than low frequency sounds so
words are not just louder, but clearer and easier to
understand. It also provides intelligent amplification
to make soft sounds audible, while keeping loud
sounds bearable.
BOOST On / Off
The BOOST button controls the loudness of the
receiver. Once the BOOST button is pressed, an extra
level of amplification is added over the entire range of
volume control.
VOLUME Control Wheel
During a call, the dial on the side controls the level of
volume for handset and speakerphone. The volume dial
provides up to 16dB of volume before the BOOST
button is activated. Once the BOOST button is
pressed, the C4220+ will provide up to 50dB of
amplification.
Auto Boost
(For turning Auto Boost On or Off, see page 24.)
ON
– When the Auto Boost is set to ON, the Boost
function will be ON every time a call starts. If the
phone hangs up, the Boost function will remain ON.
OFF
– When the Auto Boost is set to OFF, the Boost
function will be OFF at the beginning of all calls. Every
time a call starts, the user will need to press the
BOOST
button in order to gain the extra level of
amplification.
TONE
Press the
TONE
button to change the style of
amplification. Switching audio tones will change how
the telephone conversation sounds to you.
BOOST
!
BOOST
!
IN
TE
RC
O
M
TO
N
E
In order to achieve the best audio experience, we
recommend the following:
1. Adjust the Volume Control and enable the Boost
function (if needed). (Lower the volume level to minimum
(VOL 0) before activating the Boost feature.)
2. Press the
TONE
button to toggle between the available
tone settings.
Outgoing Speech Amplification (OSA)
If the level of your voice is too low, while on a call press
and hold the
BOOST
button -- the screen displays “OSA
On” on the middle line, alternating with the tone setting.
To disable OSA, press and hold the
BOOST
button until
the display shows the tone setting only.
WARNING: Voice volume level may be loud.
We recommend that you turn on this OSA
function only if your voice is considered too
quiet.
Speakerphone
To switch to speakerphone mode, press the
SPK
button
.
The display shows the speakerphone mode (see page 18).
C4220+
Your C4220+ is CID / CWCID compatible (optional service, purchased from your
local telephone service provider).
When your phone is ringing, the screen shows the name and number of the person
calling you. This information will be stored in the Caller List on your phone.
To access this list, and for further details regarding this function, press
UP
or
DOWN
in standby mode, and / or follow the instructions under CALLER LIST
(page 20).
NOTE:
If you have CID service, the date and time will automatically be set after
the first incoming call.
BOOST
!
The BOOST button
engages the amplifier,
controlling the phone’s
loudness. When the
VOLUME dial is adjusted
and the BOOST button
is pressed, the phone
can reach up to 50dB
of gain.
WARNING:
VOLUME MAY BE
LOUD. PROCEED
WITH CARE.
VOLUME & TONE ADJUSTMENTS
VOLUME & TONE ADJUSTMENTS
CALLER ID FUNCTION
