Interconnecting apparatus for a distributed switching telephone system
US4494229A · kind A · utility
11Cited by
8References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1981 |
| Grant date | Jan 15, 1985 |
| Priority date | — |
| Expiry date | Dec 16, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M7/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus for interconnecting switching modules, such as PBXs, of the time division multiplexing type is disclosed. An intertie termination unit is employed which allows signals to be effectively routed through the modules without using the primary TDM bus within the modules. The modules are interconnected in a carousel arrangement which provides substantial economic and reliability advantages over hierarchical architecture and over systems employing a combination of direct links and buses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.