The keypad is used for manual number entry for individual calls, access to a telephone interconnect system and activation of various EDACS or conventional features. The keypad is divided into both a function portion and a numeric portion as is found on a basic push-button telephone.

The display has an eight alphanumeric character line (upper line) used to show the operational mode of the radio and has a numeric character line (middle line) used to show talk time. Eight status indicators, used to indicate various operating conditions, such as; function key pressed, transmitter on, service available, radio in use, horn alert active, radio locked or transmit muted, are located below the character lines within the display.

USER INTERFACE

BUTTON

PUSH–TO–TALKEnables the radio's transmitter. (PTT) BUTTON PTT must be held down to

transmit during simplex opera tion.

KEYPAD

Function Portion

Two functions button;

1. Momentarily Press.

Terminates any ongoing activity. If the radio is designated as supervisory, it drops any ongoing group call.

2.Press and Hold (approximately 2 seconds).

Applies power to the radio. Press and hold the ON/END button to turn the radio on. All status indicators turn on momentarily and after 2 seconds a short beep is heard and the message ---ON---will be displayed on the LCD. Press a second time to turn the radio off. After 2 seconds short beep is heard and the message TURN OFFwill be displayed on the LCD. When turned off, the radio retains the

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Ericsson LBI-39110 manual User Interface Button, Keypad, Function Portion, Momentarily Press