Telephonic communications – Telephone line or system combined with diverse electrical... – Remote indication over telephone line
Patent
1994-06-28
1995-09-19
Chan, Wing F.
Telephonic communications
Telephone line or system combined with diverse electrical...
Remote indication over telephone line
379107, H04M 1100
Patent
active
054523435
ABSTRACT:
This invention relates to a method and apparatus for accessing customer meters and for controlling customer devices over a telephone line. A connection using only a single distinctive brief burst of power ringing or tone is established over a customer line between a central office and customer station equipment to alert both the customer and the customer premises equipment (CPE) or a short burst of tone to alert the CPE. The connection is between a data accessing device such as a meter reading controller and a customer premises device such as a meter interface unit. Signals are exchanged over the connection between these two units without alerting the customer via a ringing signal and without changing the supervisory state of the customer's station equipment from on-hook. The connection can also be used for controlling devices such as air conditioning units, in order, for example, to avoid overloads in a power distribution system. The voice switching network of the central office is used for making the connection between the meter control unit and the meter interface unit. Advantageously, this arrangement can allow a large number of utility meters and controlling devices to be accessed remotely using existing telephone plant. The short distinctive burst of power ringing or tone alert may be used to alert the customer premises equipment (CPE), the customer telephone, or both.
REFERENCES:
patent: 5189694 (1993-02-01), Garland
IEEE Standard for Utility Telemetry Service Architecture For Switched Telephone Network Communications, IEEEPI390/DI/May 1994, pp. 1-22, & FIGS. 1-9 attached.
Garland Stuart M.
Schull Jerome W.
AT&T Corp.
Chan Wing F.
Ghose Mony R.
Ulrich Werner
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