Multiplex communications – Wide area network – Packet switching
Patent
1987-11-17
1989-08-22
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 85, 3408255, H04J 116, H04J 314
Patent
active
048602809
ABSTRACT:
In order to prevent `jabber`, the uncontrolled transmission of messages on a communication channel, an antijabber timing unit is frequently used to determine whether a message on the communication channel exceeds the maximum permitted length of time. The present invention provides testing apparatus to determine when the antijabber timing unit is functioning accurately. In addition, protection is provided so that the testing apparatus does not compromise the function of the antijabber timing unit during subsequent message transmission. The antijabber timing unit is also used as part of the enable function for the transmission of messages over a channel to prevent the failure of a single component from resulting in inadvertent transmission of information.
REFERENCES:
patent: 4680581 (1987-07-01), Kozlik et al.
patent: 4692919 (1987-09-01), West Jr.
patent: 4700344 (1987-10-01), Kaino et al.
patent: 4701910 (1987-10-01), Ulug
Chin Wellington
Holloway William W.
Honeywell Inc.
Lenkszus Donald J.
Olms Douglas W.
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