Method for converting phone call into internet call, modem and server

Abstract

The invention relates to a method for converting the traffic amount of an analog channel into a digital channel by utilizing an unsymmetrical digital subscriber line. The method mainly comprises the following steps: a PSTN network connection step that a calling party ADSL and a called party ADSL establish PSTN network connection by utilizing a PSTN signal; an internet discover step that the calling party ADSL sends an internet establishing message to the calling server of an internet, and the calling party ADSL and the called party ADSL determine to successfully discover internet calling on the internet; an internet connection establishing step that the calling party ADSL and the called party ADSL establish the network connection; and a PSTN connection converting internet step that the calling party ADSL and the called party ADSL convert the PSTN network connection into the internet through the internet connection established, so as to release the analog channel. The invention further relates to a modulation demodulator and an internet calling server used in the method.

Description

technical field [0001] The present invention relates to a method for calling a public switched telephone network (PSTN), in particular to a method for transferring a PSTN call to the Internet by using an asymmetric digital subscriber line (ADSL), and also relates to a method for transferring a PSTN call to an ADSL modem in the Internet, and an Internet call server for call discovery and connection between the ADSLs. Background technique [0002] Most traditional telecommunication service providers are moving their business from the traditional PSTN to low-cost Internet Protocol (IP) networks. To this end, the service provider deploys a Voice over Internet Protocol (VoIP) gateway at the edge of its IP network to connect a Type 5 PSTN switch, such as tandem or trunk replacement, such as figure 1 shown. [0003] Some new Internet service providers, such as Skype, prefer to use the Internet as the carrier of IP voice. However, its calls are almost between personal computers (...

AI Technical Summary

Problems solved by technology

[0008] It is inconvenient to use these devices as phones to work, users of the system need to manually install the hardware / software environment, and the biggest trouble is that we cannot use the traditional E.164 number to get in touch with the called party, the user uses the network ID Find each other (sometimes nicknames or usernames that profit from Internet VoIP service providers) instead of the most commonly used E.164 numbers

[0009] Therefore, the traditional ADSL solution can only enable users to enjoy traditional voice calls and Internet access respectively, and of course pay for telephone charges and Internet access separately.

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