Data networks
US5387902A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1993 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Sep 23, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/40
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A LAN or other data network includes at least first and second repeater units for receiving data signals and repeating them to other parts of the data network and a transceiver unit for transmitting and receiving data which is connected to the first repeater unit by a primary data link and to the second repeater unit by a secondary data link. The primary data link comprises a primary transmit line for transmitting data from the transceiver unit to the first repeater unit and a primary receive line for receiving data from the first repeater unit and transmitting it to the transceiver unit; and the secondary data link comprising a secondary transmit line for transmitting data to the second repeater unit and a secondary receive line for receiving data from the second repeater unit and transmitting it to the transceiver unit. Intelligent monitoring means determines whether or not the transceiver unit is transmitting data and also whether or not data signals are present on each of the primary receive line and the secondary receive line and accordingly controls a switch unit to switch between two states in which either the primary transmit and receive lines or the secondary transmit and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.