Verifying DMSCK Validity
When and where to use: To ensure that the DMSCKs in the radio are valid and can be used for the air interface
encryption.
Procedure:
1 From the home screen, press the MENU key.
2 Select Security → DMSCK Validity.
3 The radio displays:
• DMSCK is Valid – the radio can work encrypted in DMO.
• DMSCK is Invalid – the radio cannot work encrypted in DMO. Please contact your service provider to restore
SCKs to your radio.
Covert Mode
This feature enables you to completely shut down all visible and audible alerts and notifications making the radio
unnoticeable even in a silent and dark environment.
When your radio is in the Covert Mode, you cannot enter the following menu items of the Setup menu.
• Set Volume
• Tones
• Backlight (in Display menu item)
When the Covert Mode is turned on:
• All tones are set to Off (corresponding to All Tones menu entry).
• The private speaker is set to Off.
• The dimmer state is set to covert (this state is not selectable using the BACKLIGHT key.)
• The wallpaper is disabled.
• The screen saver is disabled.
• The Covert Mode color palette is activated.
The radio powers up in the mode set before turning off. Thus if the Covert Mode was set before turning off, the radio
turns on in the Covert Mode .
When the Covert Mode is turned off, all the changed settings are reverted to the previous state.
When using the Covert Mode, a low audio accessory should be connected to the radio. The correct low audio
accessory is the GCAI Handset, or the older style handset connected through the junction box.
This feature can be used as the One-Touch Button.
Activating the Covert Mode
Procedure:
1 From the home screen, press the MENU key.
2 Select Security → Covert Mode.
3 Select one of the following:
• On — all tones are set to off, and the backlight and the LED are disabled immediately. The group audio is
routed to the earpiece. The radio displays Covert Mode On.
• Off — all settings for tones, backlight and audio are restored. The radio displays Covert Mode Off.
SDS Remote Control
SDS Remote Control is a feature that enables to remotely control behavior and configuration of the radio via special
SDS messages. The messages can be sent both in TMO and DMO (including the Repeater Mode) by any radio
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