MTD (mobile network)
Encyclopedia
MTD was a manual mobile phone
system for the 450 MHz frequency band. It was introduced in 1971 in Sweden
, and lasted until 1987, when it was made obsolete by the NMT
automatic service. The MTD network had 20,000 users at its peak, with 700 people employed as phone operators.
MTD was also implemented in Denmark
and in Norway
(from 1976), which allowed roaming within the Scandinavian countries
.
and Gothenburg
, with 125 total subscribers. The second system, MTB (for Mobiltelefonisystem B), had transistor
ized mobile sets, was introduced in 1962, and lasted until 1983. It operated in the 76–77.5 and 81–82.5 MHz bands, was also available in Malmö
, and had around 600 subscribers.
, introduced in 1966. In 1981 it had 30,000 subscribers, which made it the world's largest at the time.
Mobile phone
A mobile phone is a device which can make and receive telephone calls over a radio link whilst moving around a wide geographic area. It does so by connecting to a cellular network provided by a mobile network operator...
system for the 450 MHz frequency band. It was introduced in 1971 in Sweden
Sweden
Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....
, and lasted until 1987, when it was made obsolete by the NMT
Nordic Mobile Telephone
NMT is the first fully automatic cellular phone system...
automatic service. The MTD network had 20,000 users at its peak, with 700 people employed as phone operators.
MTD was also implemented in Denmark
Denmark
Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...
and in Norway
Norway
Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...
(from 1976), which allowed roaming within the Scandinavian countries
Scandinavia
Scandinavia is a cultural, historical and ethno-linguistic region in northern Europe that includes the three kingdoms of Denmark, Norway and Sweden, characterized by their common ethno-cultural heritage and language. Modern Norway and Sweden proper are situated on the Scandinavian Peninsula,...
.
MTA
In Sweden, the first mobile phone system was MTA (for Mobiltelefonisystem A), which was introduced in 1956, and lasted until 1967. It was a 160 MHz system available in StockholmStockholm
Stockholm is the capital and the largest city of Sweden and constitutes the most populated urban area in Scandinavia. Stockholm is the most populous city in Sweden, with a population of 851,155 in the municipality , 1.37 million in the urban area , and around 2.1 million in the metropolitan area...
and Gothenburg
Gothenburg
Gothenburg is the second-largest city in Sweden and the fifth-largest in the Nordic countries. Situated on the west coast of Sweden, the city proper has a population of 519,399, with 549,839 in the urban area and total of 937,015 inhabitants in the metropolitan area...
, with 125 total subscribers. The second system, MTB (for Mobiltelefonisystem B), had transistor
Transistor
A transistor is a semiconductor device used to amplify and switch electronic signals and power. It is composed of a semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current...
ized mobile sets, was introduced in 1962, and lasted until 1983. It operated in the 76–77.5 and 81–82.5 MHz bands, was also available in Malmö
Malmö
Malmö , in the southernmost province of Scania, is the third most populous city in Sweden, after Stockholm and Gothenburg.Malmö is the seat of Malmö Municipality and the capital of Skåne County...
, and had around 600 subscribers.
OLT
In Norway, the first mobile phone system was OLTOLT (mobile network)
OLT , was the first land mobile telephone network in Norway. It was established December 1, 1966, and continued until it was obsoleted by NMT in 1990...
, introduced in 1966. In 1981 it had 30,000 subscribers, which made it the world's largest at the time.