04048446 is referenced by 36 patents and cites 5 patents.

A plurality of subscriber stations and a plurality of switching points are connected in series in a loop circuit transmitting signals in one direction, parallel line sections disposed in parallel with the loop circuit are each connected with two switching points and each switching point contains a switch controlled by a failure detector and adapted for switching between a loop circuit section and a parallel line section. The transmission direction of the parallel line sections corresponds to the direction of the loop circuit; an incoming parallel line section which by-passes one or two immediately preceding switching points and an out-going parallel line section which by-passes one or two immediately succeeding switching points are connected to each switching point.

Title
Data transmission system
Application Number
5/637283
Publication Number
4048446
Application Date
December 3, 1975
Publication Date
September 13, 1977
Inventor
Zdenek Nenadal
Bern
CH
Emanuel R Hafner
Wohlen
CH
Agent
Brady O Boyle & Gates
Assignee
Hasler
CH
IPC
H04J 3/14
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