Patent · US Expired

Virtual private switched telecommunications network

US6879671B2 · kind B2 · utility

10Cited by
11References
3Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 27, 2003
Grant dateApr 12, 2005
Priority date
Expiry dateSep 19, 2023

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04M2242/22
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

A system and method to provide secure communication across the untrusted public switched telephone network includes a set of rules in a security policy which are implemented by a virtual private switched telecommunications network (VPSTN). The VPSTN provides for intercepting voice calls and modifying their set-up to include a request for bearer capability to support a data call.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.