Bi-directional data telemetry system
November 6, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesCentral station alarm Multiple services system using telephone local loop Simultaneous transmission of two information signals within a band-limited communications channel Data under voice communications system Wired spread spectrum data communication system Utility usage data and event data acquisition system Multiplexer for bit oriented protocol data link control Centerpoint automatic meter reading system Information transport system Data and voice communications system Patent #: 4672605 Inventors
AssigneeApplicationNo. 06/796052 filed on 11/06/1985US Classes:340/870.13, Time division multiplex370/352, Combined circuit switching and packet switching375/146, Transmitter379/106.01Remote indication over telephone line (e.g., telemetry)ExaminersPrimary: Yusko, Donald J.Attorney, Agent or FirmInternational ClassesH04M 11/00 (20060101)H02J 13/00 (20060101) AbstractThe data telemetry system disclosed is a complete data communications systems suitable for use by utilities such as electric companies, gas companies and water companies which can be used for meter reading and load management at individual subscribers premises. Elements of the system can also be used as a power load carrier in a premise specific local area network (LAN). With the system is disclosed, all 10,000 subscribers per exchange can be serviced. It will be understood that data can be multiplexed between a central office location and remote subscribers for any suitable purpose with the data system as disclosed. A packet switching structure is disclosed having eight to thirty-two bytes in the data message. This packet is routed between the utility and remote subscriber with routing headers being added and deleted as required by the network modules. Each successive layer of the multiplexing and switching hierarchy submultiplies the aggregate 10,000 channel capacity into fewer channels. Both time and space division switching and multiplexing are used.Other References
Field of SearchTime division multiplex | |
