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LOCNET-a local area network using optical switching

: Hermes, T.; Hoen, B.; Saniter, J.; Schmidt, F.

Journal of Lightwave Technology LT-3 (1985), Nr.3, S.467-71
ISSN: 0733-8724
Fraunhofer HHI ()
local area networks; optical communication equipment; optical fibres; switching systems; lan; linbo3 switching matrix elements; distributed circuit switching; locnet; optical switching; star type network; multistage space switch; fast switching; flexible data rate

A wideband local area network using optical switching is presently being developed by the Heinrich-Hertz-Institut in Berlin. To ensure high reliability, the system is implemented as a star type network and is divided into two subsystems. All switching within the system are done by optical switching techniques. The wideband subsystem uses lithium-niobate switching matrix elements interconnected as a multistage space switch. Thus bit rate independent channels is available with the ability to establish various wideband services of the in-house area. The second subsystem makes use of a single-mode star coupler. Distributed circuit switching with fast switching capability and flexible data rate is implemented utilizing a TDM frame that support 63 narrow band connections and a capacity of 8 Mb/s for fast data services.