Virtual private switched telephone network
US6735291B1 · kind B1 · utility
39Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2000 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Dec 31, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2203/609
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method to provide secure access across the untrusted PSTN is described. The system and method utilizes telephony resources that can be initiated by a security policy defining actions to be taken based upon at least one attribute of the call, providing multi-tiered policy-based enforcement capabilities and visibility into security events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.