Geometrical instruments
Patent
1982-04-01
1985-02-12
Abrams, Neil
Geometrical instruments
324158F, 371 22, 371 24, H01R 909, G06F 1130
Patent
active
044987161
ABSTRACT:
Known data patterns are injected and received at various points along a data link using a special data monitoring connector at least at two pieces of equipment in the link. Each connector includes a housing containing a circuit board upon which is printed conductors corresponding to the various lines of a standard interface. Terminal elements mounted on the board in contact with the printed conductors are exposed through the surface of the housing to enable data on the lines to be monitored without interferring with data flow. A switch module in circuit with each printed conductor on the circuit board controls data flow through each conductor and each conductor is further provided with a discontinuity across which a jumper is selectively connected. The known data pattern is injected into the connector data monitoring terminals at one of the pieces of equipment and is either received from the connector data monitoring terminals of another piece of equipment or is monitored at the first data monitoring terminals following "loop-back" of the monitoring terminals at another piece of equipment, depending upon the section of transmission link being tested. The injected and received data patterns are compared in a conventional manner to identify data transmission error.
REFERENCES:
patent: 2565075 (1951-08-01), Harcharek
patent: 3029367 (1962-04-01), Tomonoh et al.
patent: 3267407 (1966-08-01), Humphries et al.
patent: 3568136 (1971-03-01), Wells
patent: 3808523 (1974-04-01), Yuska
patent: 3867672 (1975-02-01), Pizzigoni
patent: 3885854 (1975-05-01), Reimer
patent: 4057520 (1977-11-01), Schwartz
patent: 4392701 (1983-07-01), Weidler
IBM Bulletin, Martin, vol. 4, No. 5, p. 33, 10-1961.
Electronics, Dip Switch, Dougherty, p. 112, 5-15-l975.
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