초록 ▼

A communication system for the transfer of information between a central station and an addressed point has the points organized in decimal groups at different remote stations, and selects a point for communication after enabling the group thereof with a unique station address. The central station e

A communication system for the transfer of information between a central station and an addressed point has the points organized in decimal groups at different remote stations, and selects a point for communication after enabling the group thereof with a unique station address. The central station equipment produces multiple-level addressing signals in serial sequence appropriate for transmission on a pair of conductors with other signals having a different frequency characteristic. All remote stations can be coupled in common with the central station, but the many points are normally inactive with regard to communication with the central station. An addressed remote station activates a selected point therein for transferring information with the central station.

대표청구항 ▼

A multiple point communication system having a central station, a plurality of communication points organized into groups, each group being associated with a different remote station, and wherein communication can take place between the central station and each communication point, said system compr

A multiple point communication system having a central station, a plurality of communication points organized into groups, each group being associated with a different remote station, and wherein communication can take place between the central station and each communication point, said system comprising: A. address signal generating means at said central station for producing address signals including at least first signals identifying the remote station to be addressed and second signals identifying the communication point of the group within the remote station which is addressed, said generating means including means for producing said address signals using a total of at least three different values in frequency and/or voltage to identify the remote station address information and communication point address information, said address signals comprising a plurality of pulses, each pulse being an independent information carrier and being identifiable with a portion of said address signals, said pulses being generated serially, B. address responsive means associated with each remote station, each said address responsive means 1. applying power to an associated response generating means in response to said first address signals identifying the associated remote station, and 2. coupling to said powered response generating means, in response to said second address signals, the associated communication point identified with said second address signals, C. signal transmission means for communicating said address signals from said central station to each remote station over a common transmission path and for communicating from Said remote stations a report signal to the central station, D. response generating means associated with each remote station, each said response generating means being normally unpowered and when powered, producing an analog valued report signal, responsive to an electrical parameter present at an associated point coupled therewith, and E. sensing means at said central station for receiving over said transmission means the output of said response generating means and for producing an output manifestation in response to said report signal.