Patent · US Expired

Internet based telephone apparatus

US6876648B1 · kind B1 · utility

43Cited by
3References
22Claims
0Family size

Assignee

Inventor

Key dates

Filing dateSep 19, 2000
Grant dateApr 5, 2005
Priority date—
Expiry dateAug 24, 2022

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04L2012/6481
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

An internet based telephone apparatus for embodying a telephone-to-telephone type of internet based telephone, the apparatus having a gateway function where a communication is possible between a general telephone connected via PSTN with another internet based telephone connected through internet network without separate internet telephone gateway installed between the internet network and PSTN, and a dual channel communication function where a communication is possible by being connected to a third internet based telephone when there is a communication connection between a general telephone connected via PSTN and a second internet based telephone connected through internet network.

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