High impedance directional signal separator for extracting and separating respective signalling components of a wireline full-duplex digital data link
US5425052A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1992 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Aug 14, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2021/0034
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireline bridge tap device and an associated signal processing mechanism are capable of successfully extracting and recovering the respective signalling components of a full-duplex wireline digital data link without having to disturb the link during its use (e.g. as by interrupting service to sever the link in order to install a line coupling device, such as a modem or attenuator pad to signal monitoring equipment). The full-duplex wireline bridge device comprises a signal characteristic monitoring device that is capable of monitoring the link and providing respective output signals representative of the respective unidirectional signal components being transmitted simultaneously in opposite directions along the link. A directional signal separator, comprised of a voltage probe and a current probe, each of which can be coupled to the link without severing the link or otherwise disrupting ongoing communications, couples the signal characteristic monitoring device to the link. The signal processing device is operative to controllably combine the outputs of the voltage and current probes and provides respective output signals that are representative of the desired unidirectional sig…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.