83
The
Men
u
DMSCK is Invalid
— your MTM800 cannot work encrypted in
DMO. Please call your Service Provider to restore SCKs to
your MTM800.
Covert Mode
(
3 8)
From the main menu, select
3
Security – 8 Covert Mode
.
Set Covert Mode to On
Select
On
. All tones are set to off, and the
backlight and the LED are disabled
immediately.
Set Covert Mode to Off
Select
Off
. All settings for tones and backlight are restored.
The LED is enabled and the message
Covert Mode Off
is
shown.
DMO SCK
(
3 9)
Once in the menu, select
3 Security – 9 DMO SCK
.
Key version
is displayed when you select the option.
Air Interface encryption provides service confidentiality
between your MTM800 operating in Direct Mode and another
terminal or a group of terminals operating in Direct Mode.
You can change the current key, if the key change operation
is allowed by your Service Provider.
To change the key, if not in a call, select
Next
. The display will
show the following message:
Change to version...
• Select
Yes
to change the key.
Key version changed
display will appear.
• Select
No
to leave the key.
Key version
display will
appear.
The audio is further more routed to the external loudspeaker
until the loudspeaker is switched off. It is recommended to use
e.g. a Telephone Style Handset in Covert Mode.
Menu
1 On
Back
Ok
2 Off
Menu
6815321H01_KOR.book Page 83 Thursday, November 13, 2008 8:06 AM
