About voip.heliopause.org

About voip.heliopause.org


VoIP allows to make telephone calls using a computer network, over a data network like the Internet. VoIP converts the voice signal from a telephone into a digital signal that travels over the Internet then converts it back at the other end so one can speak to anyone with a regular phone number.

Until recently, VoIP provided PC-to-PC telephony primarily over intranets typically found in a business environment. With the introduction of gateway infrastructure outfitted with VoIP technology, users can now look forward to the widespread increase in the usage of Internet telephony.

The project

This project aims to build test and use a VoIP network using most common VoIP protocols while including ISDN and analog legacy phones. The system connects both PSTN and VoIP worlds and enables the users to place national or international phone calls at a very low price using a computer or normal phone. International gateways in Germany, Switzerland, United Kingdom and the United States can be used as PSTN connection.

The hardware, Internet domain, setup and integration is funded and build by me (Colin Barschel). The site design and some elements are provided by SleepyOwl The friendly email service.

Testing opportunities

Once fully deployed the setup can be used to investigate various important aspects of VoIP and discover its power and challenges:


International Telecommunication Union (ITU)
SIP Session Initiation Protocol is an IETF proposed standard


ISDN: Integrated Services Digital Network
PSTN: Public Switched Telephone Network
VoIP: Voice Over Internet Protocol
VPN: Virtual private network