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Your search returned 96 patents.
( 714/717 in Current US Classification )
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Patent IDTitleDate Filed
5347522 Method and apparatus for detecting pseudo noise pattern for remote loopback test July 12, 1991
5341504 Multi-dimensional structured computer system March 1, 1990
5313476 Clock security ring June 28, 1991
5309428 Token ring local area network testing apparatus for phase jitter testing January 11, 1993
5307354 Method and apparatus for remote maintenance and error recovery in distributed data processing networks May 31, 1991
5307353 Fault recovery system of a ring network May 7, 1991
5283781 Apparatus for receiving and modifying a serial data packet from a communications network to indicate its status December 23, 1991
5278848 Bidirectional communication method June 18, 1991
5278841 Method and apparatus for diagnosing net interconnect faults using echo pulsed signals October 30, 1991
5278824 Dual hubbing in a bidirectional line-switched ring transmission system June 2, 1992
5170338 Apparatus for carrying out serial control and method of controlling said apparatus October 26, 1989
5166925 T carrier network test apparatus and method October 2, 1990
5163056 Apparatus for carrying out serial control May 4, 1990
5140625 System for testing 2B1Q telephony loopback circuits and method therefor March 4, 1991
5136589 Apparatus for using duplex transmission line in network October 31, 1989
5132962 Fault isolation and bypass reconfiguration unit December 20, 1990
5124990 Diagnostic hardware for serial datalink May 8, 1990
5111460 Process for the localization of defective stations in local networks and associated interface controller April 19, 1991
5105426 Device for detecting the position of broken line in a series controller December 29, 1989
5023873 Method and apparatus for communication link management June 15, 1989
5023872 FDDI bit error rate tester March 25, 1988
4939730 Auto isolation circuit for malfunctioning current loop October 11, 1988
4918623 Testing the performance of a communication line between two modems using modem processor October 19, 1988
4907227 In-line coupling circuit for a closed-loop communication terminal December 30, 1987
4837856 Fault-tolerant fiber optic coupler/repeater for use in high speed data transmission and the like May 4, 1987
4777330 Network system diagnosis system October 1, 1987
4697268 Data processing apparatus with message acceptance monitoring August 29, 1985
4633468 Detecting and recovering from fault condition in a serial loop data transmission system September 14, 1984
4552997 Arrangement for loop analysis testing for a digital switching system December 28, 1983
4462099 Error source excluding data transmission system November 9, 1981
4410985 Data transmission system and method March 25, 1981
4390984 Status check method for a data transmission system September 9, 1981
4385384 Modem diagnostic and control system May 19, 1981
4006456 Loop fault location and isolation January 2, 1976
RE37401 Fault recovery system of a ring network April 25, 1996
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