Method for dialing from internet extension to conventional extension

• US 20110002326A1
• Filed: 09/29/2009
• Published: 01/06/2011
• Est. Priority Date: 07/01/2009
• Status: Active Grant

• Current Assignee: National Taipei University Of Technology
• Original Assignee: National Taipei University Of Technology
• Inventors: Shen, Li-Te, Chen, Kuan Lin, Hwang, Shaw Hwa, Huang, Chi Jung, Wang, Yu Che, Liu, Ben Chen, Chang, Shun Chieh
• Granted Patent: US 8,488,595 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04M 7/0024 Services and arrangements where telephone services are combined with data services arrangements which combine a telephonic equipment and a computer H04M7/0012

Abstract

A method for dialing from Internet extension to conventional extension is disclosed. A VoIP gateway or an IP auto attendants 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.

Claims

1. A method for dialing from internet extension to conventional extension, comprises an SIP Proxy server, an Internet extension, a Private Branch Exchange, a VoIP gateway and a conventional extension;

the SIP Proxy server, the Internet extension and the VoIP gateway are connected by Internet;

the Private Branch Exchange, the VoIP gateway and the conventional extension are connected by conventional telephone lines;

said method includes;

when dialing from the internet extension to the conventional extension, it is not necessary to dial a telephone number of the Private Branch Exchange, just dial directly a telephone number of the conventional extension from the Internet extension, and then pass through the SIP proxy server, the VoIP gateway, the Private Branch Exchange to the conventional extension, no voice guidance is needed.

2. The method for dialing from internet extension to conventional extension according to claim 1, wherein the VoIP gateway has a telephone port and an Internet port, the telephone port has an FXO interface for being connected with an FXS interface of the Private Branch Exchange;

the Internet port connects with the SIP proxy server by Internet.

3. The method for dialing from internet extension to conventional extension according to claim 2, wherein if the VoIP gateway has an FXS interface, close up the FXS interface, and set up an account number of Internet telephone for being registered in the SIP proxy server, then set up a route from the Internet port to the FXO port so that an SIP message entered from the Internet port can be converted into SS7 message to send out through the telephone port;

when the Internet extension dials the conventional extension, the Internet extension sends an Internet telephone message for passing through the SIP proxy server to the Internet port of the VoIP gateway, and then the VoIP gateway analyzes a dialing number for passing through the telephone port to the Private Branch Exchange and then to the conventional extension;

the conventional extension returns with a conventional telephone message for passing through the Private Branch Exchange and then the telephone port, and then being converted into a corresponding Internet telephone message for sending through the Internet port and the SIP proxy server to the Internet extension;

a voice packet received from the Internet port by the VoIP gateway will be converted into a voice signal for sending out through the telephone port to the Private Branch Exchange and then to the conventional extension;

a voice signal received from the telephone port will be converted into a voice packet for sending out through the Internet port to the SIP proxy server and then to the Internet extension.

4. The method for dialing from internet extension to conventional extension according to claim 1, wherein the VoIP gateway can be replaced by an IP auto attendants.

5. The method for dialing from internet extension to conventional extension according to claim 4, wherein the IP auto attendants is a computer-telephone integration system comprised of a computer, a network interface controller and a telephone voice card, and an application program is designed so that when the Internet extension dials the conventional extension, the IP auto attendants receives Internet telephone messages sent from the Internet extension through the SIP proxy server by the Network interface controller, analyzes the dialing number from an Internet packet, and then sends message by the telephone voice card to the conventional extension through the Private Branch Exchange;

when the telephone voice card receives a conventional telephone message returned from the conventional extension through the Private Branch Exchange, the conventional telephone message will be converted into a corresponding Internet telephone message and sent to the Internet extension through the SIP proxy server by the Network interface controller;

a voice packet received from the Network interface controller will be converted into a voice signal for transmission through the telephone voice card, while a voice signal received from the telephone voice card will be converted into a voice packet for transmission through the Network interface controller.

6. A method for dialing from internet extension to conventional extension, comprises:

an upper SIP proxy server;

a first lower SIP proxy server having a first switchboard telephone number and being connected with an Internet extension by Internet;

a second lower SIP proxy server having a second switchboard telephone number and being connected with a VoIP gateway by Internet;

the upper SIP proxy server is connected with the first lower SIP proxy server and the second lower SIP proxy server by Internet;

a Private Branch Exchange is connected with a conventional extension, the VoIP gateway by conventional telephone lines;

said method includes;

when the Internet extension dials the conventional extension, just dials the second switchboard telephone number followed by a “

-” and

then a telephone number of the conventional extension, no voice guidance is needed.