Multiplex communications – Wide area network – Packet switching
Patent
1990-07-09
1992-10-06
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 14, 370 16, 34082517, H04J 314
Patent
active
051538741
ABSTRACT:
In a redundancy data transmission device in which a transmission signal is transmitted through all of a plurality of transmission lines constituting a redundancy transmission line and a receiving signal transmitted through any of the transmission line which is normal is selectively received, a check circuit responsive to receiving signals on the respective transmission lines for determining whether or not each of the transmission lines is normal, a detection circuit provided for the respective transmission lines for detecting sender addresses of the signals transmitted thereon, abnormality check means responsive to a determination of the check circuit and a detection of the detection circuit for determining whether or not the respective transmission lines are abnormal and for activating the switch means such that the receiving circuit is connected to a normal transmission line when abnormality is determined thereby and display means for displaying the determination made by the abnormality detection means are provided in each station.
REFERENCES:
patent: 3564145 (1971-02-01), Deutsch et al.
patent: 4251858 (1981-02-01), Cambigue et al.
patent: 4347605 (1982-08-01), Hashizume et al.
patent: 4627045 (1986-12-01), Olson et al.
patent: 4658396 (1987-04-01), Barden
patent: 4780869 (1988-10-01), Engdahl et al.
patent: 4964120 (1990-10-01), Mostashari
"Redundancy in the Physical Layer of IEEE Std 802.4-1989", Token-Passing Bus, Nov. 7, 1988, pp. 44-50.
Blum Russell W.
Kabushiki Kaisha Toshiba
Olms Douglas W.
LandOfFree
Redundancy data transmission device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Redundancy data transmission device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Redundancy data transmission device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1195934