Patent · US Active

System for dialing from internet extension to conventional extension

US8488595B2 · kind B2 · utility

0Cited by

3References

3Claims

0Family size

Assignee

National Taipei University of Technology · TW

Inventors

Shaw Hwa Hwang · Taipei, TW
Shun-Chieh Chang · Hsinchu, TW
Kuan-Lin Chen · New Taipei, TW
Chi Jung HUANG · Taipei, TW
Li Te SHEN · Hsinchu, TW
Ben Chen Liu · Taipei, TW
Yu-Che Wang · Hsinchu, TW

Key dates

Filing date	Sep 29, 2009
Grant date	Jul 16, 2013
Priority date	—
Expiry date	Dec 8, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04L12/66
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A system for dialing from Internet extension to conventional extension is disclosed. A VoIP gateway or an IP auto attendant is used for dialing from Internet extension to conventional extension. The phone number of the Private Branch Exchange and the voice guidance are not needed. The calling number of SIP message is interpreted directly and converted into DTMF (Dual-tone multi-frequency) messages for dialing into a conventional extension.

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