Telephone applicable to PSTN and IP network and call connection control method
US7352856B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2003 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Aug 31, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/2535
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone applicable to PSTN and IP network having functions of obtaining, when a call is originated by entering a PSTN telephone number, an IP network telephone number of a destination telephone corresponding to the PSTN telephone number from a telephone number translation server connected to the IP network, obtaining IP address information of the destination telephone corresponding to the IP network telephone number from a call agent connected to the IP network, establishing call connection with the destination telephone via the IP network by using the IP address information, and establishing call connection with the destination telephone via the PSTN if the IP network telephone number of the destination telephone cannot be obtained from the telephone number translation server.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.