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call or hang time is still active. Individual phone, all call, and emergency calls are transmitted clear if the
digital mode is disabled or inoperative.
If receiving an analog message trunked call, the radio responds in the analog mode during the hang time
on the working channel.
If receiving an analog I-Call, the radio responds in the analog mode during the hang time.
When using the *WHC* feature to respond to an I-Call (after the hang time has expired), the call is
transmitted in the mode defined by the system mode as programmed for the current system if the ID being
called is not in the I-Call list. If the ID is in the I-Call list, then the call is transmitted as defined by the I-
Call mode programmed in the list for that ID.
The overdial DTMF tones are not available while in the Digital Mode.
8.18.3 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.
8.18.3.1 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. Use the
or button to toggle between displaying the system key (Figure 8-9) or the
group/channel key (Figure 8-10).
Figure 8-9: System Encryption Key Display
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