Motorola TETRA MTP850 - Locking;Unlocking the Keypad; Air Encryption On;Off; Encryption Key Deletion

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Locking/Unlocking the Keypad
To prevent accidental key/button presses:
1. Press ,
OR,
From the main menu, select > Security >
Keylock. The
keypad is locked except .
2. To unlock the keypad, press , .
Air Encryption On/Off
From the main menu, select > Security > AirEncrypt.
This sub-menu allows you to view air encryption On/Off state.
Call encryption provides service confidentiality between you
and the system.
If encryption is on and you receive a clear call (unencrypted),
the MTP850 will display a
Call & Data Not Encrypted
message.
Encryption Key Deletion
Please check with your Service Provider whether the
terminal is provided with air interface encryption keys.
When there is an incoming call and the keypad is locked, you can
still use the PTT, rotary knob, , and .
The Emergency button is not locked. Entering Emergency
Operation, unlocks all keys.
You cannot manually disable Air Encryption (if fitted) from the
menu. This sub-menu only indicates if Air Encryption is enabled at
that moment.
The Air Encryption
feature is ONLY enabled depending on your
Service Provider.
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6866537D80-A.book Seite 88 Freitag, 29. Juli 2005 4:15 16