Number
12
Speaker (under keypad)
13
Send Key
Used to initiate or answer full-duplex calls (such as Phone
Calls), or send status and text messages.
14
Menu Key
Used to enter the main menu and the context sensitive menu.
15
Soft Key(s)
Press to select the option that appears in the display directly
above the left or right soft key.
16
Push-To-Talk Button (PTT)
Press and hold this side button to talk in half-duplex calls,
release it to listen.
Press to send status and text messages.
17
Programmable Side Keys 1 and 2
Default programming: upper Side key activates/deactivates
Backlight; lower Side key activates Screen Saver.
(See also No. 19)
18
Earpiece
19
Programmable Rotary Knob
Default programming: "Dual" – Press the knob to toggle between
"volume" and "list". Side keys (No. 17) operate as programmed.
20
Emergency Button (on top of the MTP850)
Press and hold to enter Emergency Mode, and send Emergency
Alarms (as programmed). When the MTP850 is Off, press and
hold to power on in Emergency Mode or in normal mode (as
programmed).
21
LED (Indicator)
Before using your MTP850 for the first time, remove the plastic lens
protector from the display, and charge the battery overnight to
ensure battery is initialised to its full capacity.
Take care to clean the bottom connector frequently and particularly
prior to the programming procedure e.g. with a soft brush (do not
use fluids).
Description
7