E.F. Johnson Company 5100 Series, Service Manual

Page: 13 / 173

GENERAL INFORMATION
1-8
include combustible dusts, and Class III materials
include ignitable fibers or flyings. The typical hazard-
ous materials in each group and class are shown in
Table 1-3.
1.12 SECURE COMMUNICATION
NOTE: Refer to Section 11 of the 5100 Operating
Manual for more information on secure communica-
tion. A link to the operating manual is located in
Section 3 of this manual.
General
SecureNet™ and AES voice encryption can be
used to provide secure communication with this trans-
ceiver. These protocols digitize the voice and then
encrypt it using the DES or AES algorithm and an
encryption key. The following types of encryption are
available on analog and digital channels:
Analog Conventional and SMARTNET/Smart-
Zone Analog Channels
•
DES
•
DES-XL (5100 versions with UCM module
only; see Table 1-4)
Digital Project 25 and SMARTNET/SmartZone
Channels
•
DES-OFB (Output Feedback)
•
AES (Advanced Encryption Standard). Later
5100 models only. Refer to Section 11 of the
5100 Operating Manual for more information (a
link is located in Section 3).
FIPS 140-2 Approved Encryption
DES-OFB and AES encryption is FIPS 140-2
approved in 5100 models equipped with the SEM or
UCM encryption module (see Table 1-4). DES encryp-
tion with the SEM on analog channels and DES-XL
encryption with the UCM is not FIPS approved.
Over-The-Air-Rekeying (OTAR)
Encryption keys are loaded into the radio by
OTAR (Over-The-Air-Rekeying) using a KMF (Key
Management Facility) and/or a handheld keyloader
such as the EFJohnson SMA (Subscriber Manage-
ment Assistant) or Motorola KVL 3000 Plus with the
AES option.
The keyloader is connected directly to the radio
using an interconnect cable, and it loads DES, DES-
OFB, and AES keys. Currently, OTAR can be used to
load DES-OFB keys on Project 25 conventional chan-
nels. Future OTAR of AES keys and on Project 25
trunked channels is planned. Refer to Section 8 of the
5100 Operating Manual for more OTAR information.
A link to this manual is located in Section 3 of this
manual.
Table 1-2 Area Classification
Division Area
Class I and II Materials (Gases, Vapors, and Dusts)
1 An area where there is or could be an explosive
atmosphere most of the time in normal
operation
2 An area where an explosive atmosphere exists
only as a result of a fault (something going
wrong)
Class III Materials (Fibers or Flyings)
1 An area in which easily ignitable fibers or mate-
rials producing combustible flyings are handled,
manufactured, or used.
2 An area in which easily ignitable fibers are
stored or handled. An exception is in process of
manufacture.
Table 1-3 Material Classification
Typical Hazard Group Class
Acetylene A I
Hydrogen B I
Ethylene, ethyl ether, cyclopropane C I
Gasoline, naphtha, butane, propane,
alcohol, acetone, benzol, natural gas D I
Metal dust including aluminum, mag-
nesium, and their alloys E II
Carbon black, coal, or coke dust F II
Flour, starch, or grain dusts G II
Ignitable fibers/flyings such as rayon
or cotton - III