ES Series Mobile Radio Operating Manual 8-7
Secure Communication (Encryption)
No Autodetect - Only signals coded like the transmit signals are received.
Proper Key Autodetect - (Analog Channels) When this feature is disabled and a
message is received with the wrong key, the audio unmutes and garbled (encrypted)
audio is heard. However, if this occurs with this feature enabled, the audio remains
muted.
8.4 Security Settings Override
The default security settings that determine how encryption keys are used for talkgroups
and channels can be changed for different operating modes.
8.4.1 P25 Conventional and Trunking Talkgroup Security
Override
Conventional digital (P25), Smartnet/Smartzone and P25 Trunking encryption strapping is
programmed on a “per talkgroup” basis. However conventional digital and P25 trunking
talkgroup encryption strapping can be overridden on a “per channel” basis.Therefore, if
desired on Conventional Digital and P25 Trunking channels, encryption can be
programmed differently for each channel. Conventional analog channel encryption is
always programmed on a per-channel basis.
8.4.2 Secure Call Behavior
8.4.2.1 Failsoft, Group Regroup or Dynamic Regroup Call
If the radio is in failsoft or is dynamically regrouped, the radio will behave as it always
has. That is, the radio will use any key to decrypt a received call and will transmit using
switched strapping and the key PID specified as originally programmed.
If the radio is group regrouped, most functionality is retained. The radio will continue to
use the key PID specified (as programmed) will use any key to decrypt a received call.
The radio will use the keys based on programming values for FS, Patch, private call,
interconnect, dynamic TG and system wide calls: when in the radio is in these modes, the
radio will not use the strapping of the current channel. This means that if the channel has
the override feature enabled, the strapping specified in this section will be used for the
channel. If the override feature is not enabled, then the strapping of the currently selected
talkgroup will be used.
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