|
|
|
|
|
|
|
← Racal Voice
The device has roughly the same dimensions as a handheld radio of the era,
and allowed secure voice transmissions over regular narrowband voice circuits,
such as VHF and UHF radio links and regular (analogue) telephone lines
(POTS).
The device measures 270 x 90 x 30 mm and weights 952 grams, battery included.
At the top
is a MODE selector, an red indicator and sockets for connection
of a handset and a radio.
At the front is a 17-button keypad
that can be used for entering the key(s).
It is compatible with the MA-4224
and with the MA-4400 secure telephone.
|
|
|
|
Judging from the manufacturing date-codes on the various chips on the PCB,
the unit shown here was manufactured around 1984. The design is based on
the earlier MA-4224, of which the many discrete logic circuits have been
combined into a single LSI chip — the RACAL RMSL — whilst the analogue
circuits were built in hybrid technology on ceramic substrates, in order
to save space.
|
UNDER CONSTRUCTION —
This page is currently being updated with new information.
Please help us to improve the quality of this page by providing
additional information.
➤ Contact Crypto Museum
Dimensions 192 x 90 x 30 mm (270 x 90 x 30 mm with battery) Weight 658 g (952 g with battery)
|
|
|
|
Any links shown in red are currently unavailable.
If you like the information on this website, why not make a donation?
© Crypto Museum. Created: Monday 13 September 2010. Last changed: Monday, 02 March 2020 - 20:09 CET.
|
 |
|
|
|
