Method for overcoming faults in an ATM I/O module and lines connected thereto
US6574686B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1999 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Nov 20, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L41/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An arrangement having a service fiber and a protection fiber connected to different I/O modules that are connected to an ATM switch. The switching functions necessary for achieving protection are realized through cooperation between the CPUs on the I/O modules of the service and the protection lines and the ATM switch fabric. The line selected has its frame buffer open, while the line in the standby mode has its frame buffer closed. In the other direction, traffic is multi-cast onto both the service and the protection lines by the ATM processing unit. In this manner, the protection fiber always contains information, ready to be switched from standby mode into active mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.