Data transmission system

Details Data transmission system Data transmission system

1987-12-24

1990-02-27

Ng, Jin F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379100, 379221, H04M 1100

Patent

active

049052730

ABSTRACT:
A device is placed intermediate a data transmitter, such as a facsimile machine and the public switched telephone network, and selectively processes the calls in a predetermined manner. The signals sent by the transmitter are monitored by the process intermediary and when a particular type of signal is identified, the device processes this signal in a different manner. For example, a particular type of signal could be a long distance signal whereupon the device stores the long distance number, supplies a current back to the transmitting device indicating that the connection has not yet been made, and then completes a call to a data transmission network with the process intermediary then connecting the data transmission network with the transmitting device after the device has transmitted the long distance number to the data transmission system. The transmitting device believes the data transmission system is the identified receiver and the data transmission system will transmit the required protocol signals to the transmitting device whereafter the signals then are transmitted in the normal manner. The data transmission system will then transmit this signal through the data transmission system to a regional location and then retransmit the data over telephone lines to the receiver. A modified data receiver is taught which is actuated by means of a non-telephone communication link and the receiver does not require a dedicated line. The modification can be in the form of a process intermediary for use with existing receivers.

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patent: 4672602 (1987-06-01), Hargrave et al.
patent: 4713837 (1987-12-01), Gordon
P. Josien et al., "External Business Communications Using Public Switched Networks", 1987, pp. 55-73.
"Paging System Broadcasts Nationwide on FM Radio Channel", Electronics, vol. 52, No. 1, Jan. 4, 1979.
PCT, Gomersall, "Preprogrammed Over the Air Marketing Research System", Oct. 10, 1985.

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