Q: Why I can't use my computer as a VoIP server and exceeded the service ?
A: You can do this, but the packets delivery provided by the service providers is so easy to install and assist in making you away from the attack through the Internet. these packets are a transport equipments, connect your phone directly to servers of a huge company, which dealing with communications from and to the Internet. If you connect a VoIP phone to the Internet using your computer, both computer and telephone - in addition to all phones and other computers connected to the network - to the same viruses and other attacks that can affect computers which are not VoIP servers.