Co., Inc.Dual time base zero dead zone time domain reflectometerUS5432705May 31, 1991Jul 11, 1995Itronix CorporationAdministrative computer and testing apparatusUS5511108Dec 4, 1992Apr 23, 1996Itronix CorporationApparatus and method for performing and controlling testing of electrical equipmentUS5521958Apr 29, 1994May 28, 1996Harris CorporationTelecommunications test system including a test and tr