Network termination unit
US5625685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1995 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Jan 26, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13299
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A network termination unit to connect a plurality of analog terminals and digital terminals to a U interface of an ISDN telecommunications network. An echo compensator is connected to the U interface to suppress an echo signal produced by the attachment of the terminal device to the U interface. A first bus connects the echo compensator to a communication controller, an a/b interface component block that is compatible with an a/b interface to which an analog terminal is connected, and an S interface component block to which a digital terminal is connected. A processor system, connected to communication controller and a/b interface component block, programs the echo compensator and the S interface component block. B channels of the ISDN telecommunications network are activated and deactivated in response to commands issued by the communication controller. The processor system further evaluates and prepares D channel signalling data for the a/b interface component block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.