M2259-00-200-812
Transcrypt Programming
71
Copyright TEL
Encrypted Radio Programming and Service Manual
02841-0X) connects the OTAR Programmer to the TOP programming radio through the
Accessory connector that has all signals required as standard.
For more information, see the TOP Programming Cable Specifications on page 74.
Note:
Ensure the accessory connector is firmly latched, otherwise it may not make
connection to all the required signals.
6.5
Using a T2000 as an OTAR Programming Transmitter
The T2000 programming cable (IPN 219-02835-0X) connects the OTAR Programmer to the
T2000 programming transmitter radio through the 9 Way D Range socket fitted to the radio rear.
For more information, see the OTAR Programming Cable Specifications on page 74.
6.6
Programming a Transcrypt Encryption Module
Refer to the OTAR programmer manual for software commands and register values.
Each encryption module is provided with a sheet for recording programmable settings. As the
module settings cannot be read back, it is strongly recommended that all settings be recorded for
each radio and kept in a secure place.
It is important to understand the meaning of the various identifiers in the programmer’s manual.
A typical sequence for programming is:
1.
Briefly transmit in secure mode from the radio to be programmed, and note the module id
‘
SXnnnn
’ which appears on the computer terminal screen.
2.
Check the radio acknowledges an
Annn
call, by returning the message confirmation
AK
nnnn xx on the PCB
.
3.
Enter programming commands as in programmer manual, for such things as system delay.
4.
The radio confirms a successful operation by returning the message confirmation
AK
nnnn xx
.
Note:
After a
Move Download
command (see TR30-3061 Manual), turn the radio off then on,
so that the module recognises the new scramble code.
6.7 Security
Codes
Security Codes
Note:
When programming a Transcrypt module, you may wish to change the default
Transcrypt security codes. See the Transcrypt programming manual for more
information on standard codes, and instructions for changing them if necessary.
Transcrypt assigns each customer a unique
master code
, and programs modules with this during
manufacture. The security of an encryption module is provided by the
total code
. This is a very
large number, resulting in too many different codes for an eavesdropper to find any code by trial.
This
total code
is a combination of the
master code
in the programmer used to program the
module, and the
scramble code
in the module. The master code acts as a customer code,
preventing accidental use of a scramble code in one fleet, which would allow decrypting of
Transcrypt Identifier
Description
Unit ID
ANI for individual module addressing
Group number
ANI Group number for paging or alerting a group of radios
Electronic Serial Number (ESN) = Main
number
Serial number for controlling access to parameter changes
Scramble Code
Unique multi-digit code sets which codes module can
decipher.
