Modular expandable telecommunication system
US7843971B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 2001 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Mar 27, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13396
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modular expandable telecommunication system having a main cabinet and at least one expansion cabinet that are interconnected with each other to obtain an extended telecommunication system with increased connection possibilities for extensions and trunks. The main cabinet and each expansion cabinet have a transmission interface unit allowing connection of the expansion cabinet(s) to the main cabinet via a single transmission link conveying voice/data channels and low level signaling for mutual synchronization and clock recovery for all interconnected cabinets. The main cabinet has a master clock device, a CPU for running software applications and a DSP for routing the higher level messages issued by the CPU depending on the physical location of the expansion cabinet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.