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English
CEP400 Overview
Controls and Indicators
The numbers below refer to the illustration on the inside front cover. 
 Number Description
1 
Antenna
2 
LED (Indicator)
3 
Top Microphone 
Activated during Simplex, high-audio calls such as Group Calls.
4 
External Antenna Connector
Used with the digital car kit to connect the RF signal to the external 
antenna.
(At the back of the CEP400)
5 
Grayscale Display *
Provides alphanumeric text and images within 130 x 130 pixels 
with backlight, scalable fonts, and contrast.
6 
Menu Key
Used to enter the main menu and the context sensitive menu.
7 
On-Off/End/Home Key
• Press and hold to turn the CEP400 On/Off.
• Press to end calls.
• Press to return to the Home display (idle screen).
8 
Audio Accessory Connector 
(At the side of the CEP400)
9 
Sensor for keypad backlight On/Off
10 
Bottom Microphone
Activated during Simplex and Duplex, low-audio calls such as 
Phone Calls.
11 
Accessory Connector
Provides connection for accessories.
(At the base of the CEP400)
12 
Speaker Control Key
Selects earpiece (low audio), PHF (low audio) or speaker (high 
audio).
13 
Speaker