Front View

The front view of the phone is shown in the figure and described in the table.

Front View

Font View Description

Item #

Label/Name

Description
1

Ring LED

Indicates phone status:

■ Green: Idle state
■ Flashing red: Incoming call (ringing)
■ Red: Answered call
2

TFT touch screen

Thin Film Transistor touch screen, a type of LCD (Liquid Crystal Display) interactive screen which displays calling information and lets you configure phone features by touching the glass.
3

Navigation Control / OK
■ Press the button's upper rim to scroll up menus/items.
■ Press the button's lower rim to scroll down.
■ Press the button's left or right rim to move the cursor left or right (when editing a contact number for example).
■ Press OK to select a menu/item/option.
4

Voicemail

Retrieves voicemail messages.

5

CONTACTS

Accesses the People screen.
6

MENU

Accesses the Settings screen.

7

Smart Button

By default, returns you to the home (idle) screen from any screen.

Can be configured to function as a redial button (see Enabling AudioCodes Smart Button for Redial Functionality ).
8

Kensington lock

Allows locking the device.
9

TRANSFER

Transfers a call.
10

HOLD

Places an active call on hold.
11

Alphanumerical Keypad

Keys for entering numbers, alphabetical letters and symbols (e.g., colons)
12

Microphone

Allows talking and listening. The network administrator can disable it if required.
13

Speaker

Activates the speaker, allowing a hands-free conversation.
14

Headset

Activates a call using an external headset.
15

Mute

Mutes a  call.

16
17

▲ VOL

Increases or decreases the volume of the handset, headset, speaker, ring tone and call progress tones.

▼ VOL
18

'Back' key

Returns you to the previous screen.
● Differences exist between C455HD non-DBW and C455HD DBW.
● C455HD DBW features an expansion module; C455HD non DBW does not feature one.
● The preceding figure shows C455HD non DBW.