Telephonic communications – Telephone line or system combined with diverse electrical... – To produce visual-graphic copy
Patent
1995-08-25
1997-10-14
Chan, Wing F.
Telephonic communications
Telephone line or system combined with diverse electrical...
To produce visual-graphic copy
34087002, H04M 1100
Patent
active
056779470
ABSTRACT:
A telemetry device is provided which communicates over a phone line with one of a plurality of host stations. The telemetry device includes a plurality of meter ports and a memory for storing host attribute information for the plurality of host stations. In one embodiment, the host attribute information stored in memory includes a table of host call-in times for the respective host stations and further includes respective telephone numbers for those host stations. The telemetry device determines when the call-in time of a particular host station has been reached. More particularly, when the call-in time of a particular host station has been reached, the telemetry device initiates a call to the host station over the phone line and establishes a connection therewith. A telemetry transaction then ensues between the particular host station and the telemetry device. The particular host station transmits command codes to the telemetry device to cause the telemetry device to read consumption information from a particular meter port. The consumption information is then transmitted over the phone line to the host station for further processing.
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"Outline Specification For A Meter Interface Unit for use with PSTN No Ring Calls" by K.E. Nolde, BT Laboratories May 8, 1993.
Chan Wing F.
International Teldata Corporation
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