Fiber optic telephone loop network
US5325223A · kind A · utility
117Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1991 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Dec 19, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0081
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Novel fiber optic telephone loop networks are disclosed. In the networks, single mode fiber optics are used for feeder and distribution segments of the loop but multimode fiber optics are used for the drops. The use of the multimode fiber optics has permitted the use of less costly optoelectronic devices. Surface light emitting diodes are such economical but reliable parts. Fiber service terminals located near customer homes convert single mode operation to the multimode operation. The networks are relatively easy to install and upgrade and are very economically competitive with other known FTTC and FTTH schemes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.