Remote monitoring device

Details Remote monitoring device Remote monitoring device

1988-10-14

1990-06-26

Tarcza, Thomas H.

Cryptography

Cryptanalysis

380 4, 379 34, 379112, 379130, 379133, 379136, 379140, G11B 2328, H04M 1504, H04M 1518

Patent

active

049378627

ABSTRACT:
A miniaturized DNR monitoring device is adapted to communicate over a telephone line, or otherwise, with a remote unit which may also communicate with other monitoring units. The monitoring device includes a computer chip program to select target DNR data from non-target DNR data, a memory for storing a limited amount of data, a DNR output line, means for downloading stored data over its output line to its remote unit on command or upon the occurrence of preselected events, and means for identifying transmissions to and from its remote unit by a handshake routine.

REFERENCES:
patent: 4013839 (1977-03-01), Bell
patent: 4656657 (1987-04-01), Hunsicker
patent: 4712230 (1987-12-01), Rice et al.
patent: 4813065 (1989-03-01), Segala
JSI Telecon J1066 Dial-Up Slave System Users Manual, Undated (Unit appeared in the marketplace about May, 1987).
JSI Telecom J1033C Dialed Number Recorder Users Manual, Undated (Unit appeared in the marketplace about February, 1987).
Discovery Technical Manual published by Mitel Datacon, Issue 1, May, 1987.

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