Method and apparatus for the transmission fault detection in an access network
US7321730B2 · kind B2 · utility
6Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2003 |
| Grant date | Jan 22, 2008 |
| Priority date | — |
| Expiry date | Jun 12, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0083
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical network unit (ONU) interconnected by passive optical network (PON) equipment to an optical line terminal (OLT) is identified using secondary modulation of the optical carrier to impress an identifier of the ONU onto the carrier. This resolves a recurring ONU failure mode detection problem caused by failure of a laser driver that causes the ONU to be stuck in an on state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.