E.F. Johnson Company Viking VM600, Руководство по эксплуатации

Страница: 157 / 207

Draft 02 - Sep 1 2015
Viking Mobile Radio Operating Manual 7-1
S
E C T I O N
Section7
Secure Communication (Encryption)
This radio may be equipped to provide secure communication on some or all channels.
This feature encrypts the voice so that it can be understood only by someone using a radio
equipped with a similar encryption device and encryption codes.
If equipped with the Clear/Secure option switch and the current channel is programmed to
allow switch selection, secure communication can be manually enabled and disabled by
that switch. Otherwise, channels are strapped to Clear or Secure operation (see Section
7.3). Secure communication can be programmed on a per channel or per talkgroup basis to
operate in various ways. When a secure call is received, the LED flashes Red and
(Standard Control Head) or (Lightning Control Head) is flashed on the display.
7.1 Encryption Algorithms
The following paragraphs describe Encryption algorithms.
7.1.1 Encryption Available With Various Channel Types
Digital Channels - On conventional P25, SmartNet/SmartZone, and P25 Trunking
channels, the DES-OFB, AES-OFB, or ARC4 protocol is used.