Token ring local area network testing apparatus using time delay reflectory
US5381348A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Jan 11, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/433
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A token ring local area network (LAN) testing apparatus is provided. The apparatus utilizes time delay reflectory (TDR) in testing cable conductors that link or interconnect stations on the token ring with the token ring media access unit (MAU). In making the TDR related measurements, a directional coupler device is used in transmitting and receiving signals relative to the cable conductor. Information related to the magnitude and location of any cable conductor fault that is obtained. A TDR measurement can be used to determine the existence of a fault at the end of a cable conductor. A single matching impedance element is selected to match the impedance of the cable conductor before conducting any TDR measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.