INTEGRATED services digital network (ISND) system provider Deutsche Telekom - one of the participants at the Asian IT Expo '94 - Telekom has experienced an unprecedented increase in ISDN subscriptions of more than 100 per cent per annum in Germany.
Last year, the ISDN service generated about US$1.5 billion from about 1.2 million B-channel connections.
Each ISDN B-channel is a transmission path for data at a speed of 64 kilobits per second and can be used for normal telephone conversation, data transmission, or video signals.
With the ISDN, different types of applications can easily be integrated; for example, for voice communications, for connecting together two different Local Area Networks (LAN) with different types of hardware and software, or for video conferencing.
A number of ISDN B-channels can easily be aggregated to produce a wider transmission path for applications. Users only need to pay for the transmission capacity used.
ISDN applications can be classified into three broad categories:general office communication,applications that exploit the benefits of multi-media and applications that connect computer networks together.