High-speed facility protection in a digital telecommunications system
US5329520A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1992 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Jul 17, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A digital communications system with fast facility protection is disclosed. The system includes at least one digital cross-connect which is in bidirectional communication with east and west routes of the network via east and west transmit ports and east and west receive ports. The cross-connect broadcasts a facility over both the east and west routes, and receives the return facility over one of the routes. The cross-connect monitors the error status of the received facility for hard error conditions and excessive error rates, by way of a distributed processor in communication with the port. In the event of an error, the cross-connect blind switches the facility to the inactive port by way of a receive-end switch, according to a first embodiment. According to another embodiment, a head-end switch is performed, thus allowing for improved flexibility for port assignment in the cross-connect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.