History
Development of the system started at Televa, the Finnish state owned telecom equipment producer in the early 1970s, under the leadership of Keijo Olkkola.
The first order was received in 1973 for a 100 subscriber local exchange for the small and remote island community of Houtskär, to be delivered in 1979. After the first installation in 1982, the DX 200 captured a 50% share of the Finnish fixed line exchange market.
The exchange's modular design and development of microprocessors technology enabled a gradual increase in the system's capacity. By 1987 the installation base had grown to 400,000 subscriber lines. Early export markets included China, Nepal, United Arab Emirates, Sri Lanka, Sweden, Turkey and the Soviet Union. In 1984 development of a version of the exchange for the Nordic Mobile Telephone network was started.
In 1991 the world's first GSM call was made using Nokia devices. Core network components were based on DX 200 platform.
In 2005 DX 200 based VoIP server was provided to Finnish operator Saunalahti, providing state of the art fixed-mobile convergence solution. This is a prime example on how well DX 200 is suitable for internet server development and the overall flexibility of the whole DX 200 platform.
In 2009 world’s first voice calls in LTE networks using commercial, 3GPP-standardized user and network equipment.
Read more about this topic: Nokia DX 200
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