User Manual

36
Private Mode
The Private Mode allows the radio to transmit encrypted messages and receive
clear or private transmissions. The radio transmits private if the group/channel
is programmed for private operation and forced operation is pre-programmed.
If autoselect operation is pre-programmed and the radio is in the Private
Mode, the radio transmits in the mode of the received call if the hang time is
active. If no hang time is active, the radio transmits private.
Cryptographic keys are transferred to the radio using a cryptographic
Keyloader. Up to seven (7) different cryptographic keys, numbered 1-7, can
be transferred from a Keyloader and stored in the radio. An individual key is
automatically selected on a per-group/channel basis according to the radio
programming. Groups and channels within the digital system can be
programmed for keys 1-7 (private). Up to 8 banks of 7 keys can be stored for
private systems. The bank is specified per system.
When operating on a group or channel programmed for Private Mode, all
transmissions are private transmissions and the radio receives clear and
private signals. The status icon
is displayed when the Private Mode is
enabled. If the selected group or channel is programmed for auto-select
capability, the mode may be toggled between private and clear with the

key, then following the selection mode rules. Radios programmed for forced
private operation do not allow a change of the transmit mode.
Displaying the Currently Used Cryptographic Key Number
To Display the Currently Used Cryptographic Key Number for either the
system encryption key (for special call such as individual, phone, all, agency
or fleet) or the group/channel key (for group or conventional calls), perform
the following procedure:
1. Press the
 button.
2. Use the
 or  button to select "DISP KEY."
3. Then use the
 or  button to toggle between displaying the system
key or the group/channel key.
System Encryption Key
Figure 18: System Encryption Key Display