Operating Manual Part 15

Table Of Contents
October 2008 5300 ES Series Mobile Radio Operating Manual 10-5
Secure Communication (Encryption)
10.2.5 Encryption Key Erase
A KY CLR option switch can be programmed that allows the user to permanently erase all
stored keys. If OTAR TEK and KEK keys are stored, all keys of both types are erased.
This function can be used to ensure that unauthorized encrypted calls can no longer be
placed or received by a radio.
On a mobile radio, you must press the erase keys button twice within a small period of
time for the keys to be erased.
10.2.6 Encryption Icon Operation
Basically, the encryption icon is on continuously whenever a secure call is received or
transmitted. Other operation is as follows:
It flashes when the radio is in secure mode and receives a clear call on a digital and P25
trunking channel.
It is on continuously when receiving a clear call in the secure mode on an analog
channel.
An option can be programmed to sound a beep whenever a secure call is received on a
clear channel.
10.3 Clear / Secure Strapping
10.3.1 Transmit Mode Options
The following transmit options are available when encryption is selected:
“Clear” - All calls are in the clear mode.
“Secure” - All calls are made in the selected secure mode.
“Switched” - The mode is selected by the Clear/Secure switch. When the clear mode is
selected by this switch and a secure call is received, or vice versa, you will hear a beep.
Press the programmed option button to change to the appropriate mode. When the clear
mode is selected by this switch, “CLEAR” is flashed, and when the secure mode is
selected, “SECURE” is flashed.