Multiplex communications – Wide area network – Packet switching
Patent
1989-01-09
1991-04-23
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 15, 371 205, 371 202, H04J 116, H04J 314
Patent
active
050105442
ABSTRACT:
A fault-location operating system for use with transmission networks using repeaters with loopback capabilities. A plurality of bidirectional transmission links L.sub.i, for i=1 through N, are used for transmission of data between the terminals. A test control unit is connected at the first terminal to the first end of the first transmission link L.sub.1, and controls transmission of control signals across the first transmission link L.sub.1. A plurality of repeaters R.sub.i, for i=1 through N-1, are used for interconnecting the plurality of bidirectional links. Each repeater R.sub.i is connected to the first end of one transmission link L.sub.i and to the second end of another transmission link L.sub.i+1. Each repeater includes a first circuit for repeating data transmitted from the one transmission link L.sub.i for transmission on the other transmission link L.sub.i+1, and a second circuit for repeating data transmitted from the other transmission link L.sub.i+1 for transmission on the one transmission link L.sub.i. In addition, a loopback circuit is included in each repeater that is responsive to the control signals on the one transmission link L.sub.i for looping back data transmitted from the one transmission link L.sub.i for transmission back on the one transmission link L.sub.i. In this system, each repeater has a loopback capability responsive to control signals sent through the transmission links. The loopback capability can be provided in other elements in the network so that a single test control unit can be used to located faults anywhere within the network.
REFERENCES:
patent: 4059729 (1977-11-01), Eddy et al.
patent: 4402075 (1983-08-01), Bargeton et al.
patent: 4425662 (1984-01-01), Jeandot
patent: 4564933 (1986-01-01), Hirst
patent: 4630268 (1986-12-01), Rodenbaugh
patent: 4686668 (1987-08-01), Koseki et al.
patent: 4688208 (1987-08-01), Kawaguchi
patent: 4688209 (1987-08-01), Banzi, Jr. et al.
Snow et al., "Digital Data System: System Overview", The Bell System Technical Journal, vol. 54, No. 5, May-Jun., 1975, pp. 811-832.
TA-TSY-000077, "Digital Channel Banks-Requirements for Dataport Channel Unit Functions", Issue 3, Apr. 1986, Bell Communications Research, Inc.
TA-TSY-000055, "Basic Testing Functions for Digital Networks and Services", Issue 3, Apr. 1987, Bell Communications Research, Inc.
TA-TSY-000053, "Centralized Fault Location for Digital Transmission Systems", Apr. 1985, Bell Communications Research, Inc.
Akagi Shigeyuki et al., U.S. Pat. No. 4,271,513, Issued: 81/06/02, Abstract Only.
Canniff, U.S. Pat. No. 4,380,810, Issued: 83/04/19, Abstract Only.
Bauer Paul R.
Chang Ker-Chin
Dunwoodie Duane E.
Elkins Clarence E.
Lobitz Walter A.
Chin Wellington
Olms Douglas W.
Wiltron Company
LandOfFree
Fault location operating system with loopback does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fault location operating system with loopback, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fault location operating system with loopback will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1626189