Method of and system for extending internet telephony over virtual private network direct access lines
US6879680B2 · kind B2 · utility
23Cited by
75References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2002 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Jan 11, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S379/901
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A virtual private network includes an internet protocol (IP) network and a public switched telephone network (PSTN). An enterprise gateway is operably connected to the IP network. The enterprise gateway is operably connected to a switch of the PSTN through a direct access line (DAL). The set-up signaling for virtual private network calls and the calls themselves are transported across the internet protocol network and the public switched telephone network through the direct access line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.