National Taipei University of Technology

Yu Che Wang

Shaw Hwa Hwang

Shun Chieh Chang

Kuan Lin Chen

Chi Jung Huang

Ben Chen Liu

Li Te Shen

Li-Te Shen

A system for dialing from Internet extension of other SIP proxy server 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.

Method for dialing from internet extension to conventional extension

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.

System for dialing from internet extension to conventional extension

A method for dialing between Internet extensions is disclosed. When dialing between Internet extensions, just dial the switchboard phone number of SIP proxy server plus '-' and then dial the extension phone number of the opposite Internet extension directly. It is not necessary to use a voice guidance for asking dialing of the extension phone number of the opposite Internet extension.

Method for dialing between internet extensions

Growing community of inventors

Taipei, Taiwan

Yu Che Wang