Method for dialing between internet extensions

• US 20100329240A1
• Filed: 09/29/2009
• Published: 12/30/2010
• Est. Priority Date: 06/30/2009
• 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 8,279,855 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 65/1053 IP private branch exchange [PBX] functionality entities or arrangements circuit switched PBXs H04M3/00
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04M 7/0075 Details of addressing, directories or routing tables

Abstract

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.

Claims

1. A method for dialing between Internet extensions, comprises:

an upper SIP proxy server;

a plurality of lower SIP proxy servers, each of the lower SIP proxy servers has a switchboard phone number;

each of the lower SIP proxy servers manages a plurality of Internet extensions, and each of the plurality of Internet extensions has an extension phone number;

the upper SIP proxy server connects with the plurality of lower SIP proxy servers by Internet;

each of the plurality of lower SIP proxy server connects with the plurality of Internet extensions under management by Internet;

said method comprises;

when dialing between the Internet extensions, just dial the switchboard phone number of an opposite SIP proxy server plus “

-” and

then dial an opposite extension phone number directly;

it is not necessary to use a voice guidance for asking dialing of an opposite extension phone number.

2. The method for dialing between Internet extensions according to claim 1, wherein when an lower SIP proxy server is waiting for an Internet telephone message, the processes are as below:

a. once there is an Internet telephone message coming in, the lower SIP proxy server will analyze if it is a “

call-in”

or a “

call-out”

message;

b. if the message is a call-in message, then check if there is a “

-”

;

If there is a “

-”

, then delete the “

-” and

an switchboard phone number before the “

-”

, only remain an extension phone number after the “

-”

, and send the message to the Internet extension;

If there is no “

-”

, then send the message directly to the Internet extension, and return for waiting the next message;

c. if the message is a call-out message, then add an switchboard phone number of the lower SIP proxy server and “

-”

before an extension phone number, send the message to the upper SIP proxy server, and then return for waiting the next message.