GPIB extender with find listener protocol capabilities

Details GPIB extender with find listener protocol capabilities GPIB extender with find listener protocol capabilities

1995-05-31

1996-11-05

Marcelo, Melvin

Multiplex communications

Wide area network

Packet switching

370 8513, 370 859, 370112, 371 32, 371 221, 364244, 3642328, 3642624, 395800, H04L 1240

Patent

active

055725252

ABSTRACT:
A GPIB bus extender which intelligently supports the IEEE 488.2 find listeners protocol. The GPIB bus extender of the present invention monitors the bus and determines when a talker is present on the bus. When the GPIB extender detects a talker present on the bus, the extender configures itself as a listener to receive any messages for devices on the remote bus. When the GPIB extender does not detect a talker present on the bus, the extender does not configure itself as a listener, but rather is prepared to participate in a find listener protocol.

REFERENCES:
patent: 4451886 (1984-05-01), Guest et al.
patent: 4817101 (1989-03-01), Wyeth et al.
patent: 4959833 (1990-09-01), Mercola et al.
patent: 5287528 (1994-02-01), Canik et al.
patent: 5315706 (1994-05-01), Thomson et al.
Guest, David H., "An HP-1B Extender for Distributed Instrument Systems," Hewlett-Packard Journal, Aug. 1979, pp. 26-32.
Leibson, Steve "What are RS-232C and IEEE 488?," Instruments and Control Systems, Jan. 1980, pp. 47-53.

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