NT2 unit for an ATM network
US5768272A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | May 1, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5672
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A NT2 (Network Termination type 2) unit comprises a terminal and control unit and an arbitrary number of identical switching units (39) which are interconnected in a loop configuration by means of two connecting lines (123, 124). Similar to an NT1 (Network Termination type 1) unit, each of the switching units (39) comprises two mutually opposed transmitting paths (23, 24) for ATM (Asynchronous Transfer Mode) cells as well as two input/output circuits (22.1, 22.2) to which the connecting lines (123, 124) are connected. The switching unit (39) further comprises a third input/output circuit (22.3) allowing the connection of terminal equipment. Finally, the switch unit (39) is provided with an extractor (31) and an inserter (32) which are inserted in the transmitting paths (23, 24) and are connected to the third input/output circuit (22.3) via connecting lines (35.1, 35.2). According to address indications contained in the cells, the extractor (31) directs incoming cells either to the second or to the third input/output circuit (22.2, 22.3, respectively). The inserter (32) multiplexes incoming cells to the first input/output circuit (22.1). The switching unit (39) thus provides a switc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.