High density telephone network interface unit
US5631956A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1996 |
| Grant date | May 20, 1997 |
| Priority date | — |
| Expiry date | May 17, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/028
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved network interface unit having a substantially smaller width than many prior art network interface units. The network interface unit comprises a single, planar circuit board assembly interconnected between incoming and outgoing telephone lines and incoming and outgoing customer premises lines. Two relays and a controller are mounted on the board. The controller monitors the transmission of data along the lines and, by activating the relays, provides communication and maintenance functions, such as loopback. The network interface unit utilizes a controller made up of (1) a processor-based software control system and (2) an integrally cooperating application specific integrated circuit. The controller may, for example, provide and monitor framing, detect and monitor signals, and convert bipolar data to unipolar data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.