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True Cost Savings with Billion's BiPAC 6404VP router! This VoIP Firewall Router packs many powerful features into a single box to allow home and SOHO users to enjoy affordable VoIP calls, while at the same time providing secure, high-speed internet access. The world-standard Gateway feature known as �Least Cost Routing� enables users to choose the best VoIP call rates provided by various Internet Telephony Service Providers (ITSPs). Two integrated FXS ports provide dual lines for making VoIP calls. An additional FXO port enables you to make calls via PSTN Fixed-line while providing even faster Internet access sharing. Unparalleled firewall security features such as SPI, DoS attack prevention, and URL Content Filtering protect your Internet access against attacks by hackers. In addition, the Quality of Service feature ensures a smooth net connection for inbound and outbound data with minimal traffic congestion.