Automatic restoration of communication channels
US6295615A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 1995 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Feb 8, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/0663
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device (310, 320), in its receiver aspect, interconnects a high-rate terminal, e.g. DS1, link transmitting outgoing fractional DS1, e.g. DS0, channels destined for a customer site with autonomous first and second networks (301, 302) composed of high-rate links (112, 312) propagating incoming fractional DS1 channels. Each network is adapted to insert a fault indication signal in any channel affected by a fault condition. The device monitors each incoming channel from each network for a fault indication signal and switches fractional DS1 channels from the network manifesting a fault condition to the alternate network, thereby maintaining essentially uninterrupted digital service to the customer site. In its transmitter aspect, the device transmits replicated versions of channels supplied by the terminal link simultaneously onto both the first and second networks, thereby providing a substantially identical device connected at the other end of the networks with corresponding incoming high-rate link signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.