Figure 2 User interface
Abbreviation:
HK Hardkey (keys with fixed functions)
Design
The main component of the display is a colour display with background
illumination. The display is made of a special scratch-resistant and mechanically
resilient material. The colour display is suitable for day and night use.
The keyboard is below the display element. The keyboard consists of a 14-key
keypad.
The emergency button is at the top section of the device. In addition, the PTT
button must always be pressed as confirmation. The emergency button is of
sufficient size and has a distinct pressure point. This allows one-handed operation
with thick winter and work gloves.
The device is equipped with a PTT button. The PTT button is located on the left side
of the device.
The loudspeakers serve for voice communication between the subscribers. The
handheld is equipped with two loudspeakers. A monitor speaker in the upper