Vogtec is a professional manufacturer of VoIP network solutions networks in the classical sense SIP server, also known as a SIP proxy or registrar. Without a telephone system, businesses can network Vogtec’s SIP telephones in the decentralized peer-to-peer network (or P2P for short).` This allows Voice over IP systems to be connected intuitively with just a few clicks via the web browser, saving time-consuming configuration and maintenance. The beginnings of peer-to-peer networks have become popular among P2P file-sharing networks such as Napster, KaZaA and eMule.