Telephonic communications – Telephone line or system combined with diverse electrical... – To produce visual-graphic copy
Patent
1995-08-25
1997-10-28
Chan, Wing F.
Telephonic communications
Telephone line or system combined with diverse electrical...
To produce visual-graphic copy
379142, 34087002, H04M 1100
Patent
active
056824220
ABSTRACT:
A telemetry device is provided which communicates over a phone line to a central host station. The telemetry device includes a plurality of meter ports. In one embodiment, the host station transmits a data activating signal to the telemetry device. The data activating signal instructs the telemetry device to read consumption information from a designated one of the meter ports. The consumption information is then transmitted back to the host station. In another embodiment, one of a plurality of host stations transmits a data signal to the telemetry device. The data signal instructs the telemetry device as to which one of the plurality of host stations to call to provide an on-demand reading of a meter port.
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May 8, 1993 "Outline Specification For A Meter Interface Unit for use with PSTN No Ring Calls" by K.E. Nolde, BT Laboratories.
Chan Wing F.
International Teldata Corporation
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