Device and method for expanding legacy switches
US6570981B1 · kind B1 · utility
4Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1999 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Dec 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/1334
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modular digital telephone system and method featuring a universal telephony shelf adaptable for incremental expansion of legacy telephone switches and as a building block in the construction of new telephony switches. The shelf includes identification and connectors for shelf pairing, and is adapted to receive redundant power supplies, plural line cards, and either a peripheral shelf interface unit or a switch array card which provides both a local shelf interface and three interface units for connection to the peripheral interface units of other shelves. System wide fault displays are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.