E.F. Johnson Company 53SL ES Series, Руководство по эксплуатации

Страница: 141 / 190

53SL ES Series Mobile Radio Operating Manual April 2009 8-7
Security Settings Override Section 8 - Secure Communication (Encryption)
8.3.3 Talkgroup Encryption Override
On conventional digital (P25) channels, the encryption strapping mode and PID are
programmed on a per talkgroup basis similar to the trunked modes (SMARTNET/
SmartZone/P25 Trunked). However, with this mode only, there is the option to override
the talkgroup encryption programming and program it on a per-channel basis. Therefore,
if desired on conventional digital channels, encryption can be programmed differently for
each channel. Conventional analog channel encryption is always programmed on a per-
channel basis.
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 Conventional (P25) Talkgroup Security Override
On conventional digital (P25) channels, the encryption strapping mode and PID are
programmed on a per talkgroup basis similar to the trunked modes (SMARTNET/
SmartZone/P25 Trunked). However, there is the option to override the talkgroup
encryption programming and program it on a per-channel basis. Therefore, if desired on
conventional digital 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.
However, the strapping of the current channel will be used. 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.