Multiple virtual multipoint modem using TDM/token throwing technique
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United States of America Patent
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Jan 10, 1989
Grant Date -
N/A
app pub date -
Aug 18, 1987
filing date -
Aug 18, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for use on communications channels such as telephone lines, makes use of a Token Throwing Multiplexer (TTM) whereby a plurality of multipoint networks each having a master or local station and one or more remote stations and each having a station located at a common site can function as substantially independent networks while using common modems and telephone lines. The TTM uses conventional time division multiplexing (TDM) techniques in the outbound direction. Contention for the inbound line is resolved by a token throwing technique, the current inbound user being the location and channel in possession of the outstanding token.
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