(Siemens) EDS¶

Siemens EDS is the type of digital exchange equipment which was used to build the German DATEX-L CSPDN (circuits switched public data network). It was also used as backbone to migrate Telex subscribers away from the older electromechanical switches. Since it didn't just serve one data technology, but (at least) Telex, CSPDN__Datex-L and Teletex, the network based on EDS technology was also called IDN (Integriertes Daten Netz).

EDS is the result of a development collaboration between the two manufacturers Siemens AT and SEL (Standard Elektronik Lorenz AG)

Early design started in 1965 by consultation of Deutsche_Bundespost with the industry, and subsequent testing, the first EDS exchange wnet into production in 1975 in Mannheim. It was supposedly the first world-wide fully electronic circuit-switched data exchange supporting up to 16,000 subscribers via time division multiplex. By 1978, more than 60% of all Telex and Datex subscribers had been migrated over to the EDS.

DVST-L¶

DUST¶