Determining whether characteristics of a local area network node allow it to receive power over communication cabling
US7305573B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2003 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Mar 26, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/323
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A power supply subsystem for providing electrical power to a local area network node over communication cabling, the power supply subsystem containing: a power management and control unit; programmable current limiting circuitry responsive to the power management and control unit to provide a programmable current limited output; voltage measurement means; and at least one of a combiner and a power supply interface operative to couple the programmable current limited output to the communication cabling. The power management and control unit is operative to: measure, utilizing the voltage measuring means at a plurality of pre-determined intervals, a voltage developed in accordance with the coupled programmable current limited output; and determine, as a consequence of the measured voltage whether characteristics of the node allow it to receive power over the communication cabling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.