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Phones ATF-2
Analogue NMT-450 mobile telephone
RD-59 – also known as Mobira Talkman –
was an analogue cellular mobile telephone set
for the Nordic Mobile Telephone standard NMT-450,
introduced in 1983 by Nokia Mobira in Finland.
It was used in the Nordic countries: Norway, Sweden, Finland and
Denmark, and in an adapted form also in other countries,
including The Netherlands, Belgium, Luxemburg and the United Kingdom.
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The image on the right shows an RD-59 that was used on the
Dutch ATF-2 network
from 1985 to 1999. It was marketed in the Netherlands by
KPN
(formerly: PTT)
as the CARVOX 2453 car phone.
The difference with the native NMT-450 variant was that it had a 20 kHz
channel spacing rather than the original 25. As a result, the Dutch
were able to fit more channels in the available space and hence
allow more users simultaneously.
The full-duplex radio transmitted in FM in the 451.310 to 455.730 MHz band
with an output power of 6 to 18 Watts.
Reception was 10 MHz higher, in the 461.310 to 465.730 MHz range.
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The radio consists of a universal compartmented die-cast aluminium enclosure
that houses the electronic circuits. The same case was
used for other versions of the radio, such as the simplex trunking variant.
Attached at the right side is a large rechargeable NiCd battery pack and
– at the front – a detachable handset with a coiled cable.
At the top is a plastic grip with the ¼λ antenna.
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The same enclosure was used for the Nokia RD-58, which is actually a two-way
radio of which the internal design is completely different from the RD-59.
The RD-58 was available as a standard two-way radio, as a trunking radio, and
as a secure (trunking) radio
— the SE-580 CRYPTOVOX
— which had a built-in Crypto AG/Hagelin HC-3400 voice encryption module.
➤ More about the SE-580
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ATF
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Autotelefoon
Name for the Dutch automatically-switched analogue carphone networks,
of which three generations have existed (nown as ATF-1, ATF-2 and ATF-3.
Succeeded in 1994 by GSM.
➤ More
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GSM
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Global System for Mobile Communication
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KPN
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Koninklijke PTT Nederland
Royal PTT of The Netherlands. This was the name of the former Dutch
state-owned telecom monopolist PTT after its privatisation in 1989.
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PTT
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Staatsbedrijf der Posterijen, Telegrafie en Telefonie
Dutch state-owned telecommunications monopolist from 1881 until its
privatisation in 1989.
Responsible for the development and operation of the post, telegraph
and telephone networks in the Netherlands. Also responsible for monitoring
the radio spectrum and for enforcing the telecom laws.
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© Crypto Museum. Created: Saturday 25 May 2019. Last changed: Thursday, 24 August 2023 - 17:52 CET.
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