Synchronous digital hierarchy switch system
US6553111B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1999 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Oct 13, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J2203/006
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
There is provided a digital switch system for connecting a telephone central office with a number of subscriber lines, in which the system includes at least one central office-digital trunk interface switch which allows digital signals to be transmitted between the switch system and the central office, and a number of subscriber line interface switches which allow signals to be transmitted between the switch system and the subscriber lines, in which each of the subscriber line interface switches is connected with at least one subscriber line via at least one digital-to-subscriber line converter, and in which the central office-digital trunk interface switch and the subscriber line interface switches are connected in a ring-shaped structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.