High Quality yet Affordable for All Businesses PLANET VGW-420FS enterprise-class 4-port SIP VoIP Gateway provides added flexibility during migration to Unified Communications by supporting the traditional analog devices. These devices include analog phones, fax machines, modems, voicemail systems and speakerphones.    Enhanced, Full-Featured Business Gateway PLANET VGW-420FS 4-port FXS SIP VoIP Gateway is a fully IETF SIP RFC3261 standard compliant residential gateway that provides a total solution for integrating voice-data network, with built-in SIP trunk and TLS/SRTP security, up to 4 concurrent connections. Voice communications can be established from anywhere around the world, and it not only provides quality voice communications, but also offers secure, reliable Internet sharing capabilities for daily voice and Internet communications.    Distributed VoIP Network Infrastructure PLANET VGW series is easy to use for all types of businesses. The VGW-420FS offers quality voice communications and real-time fax data over IP networks and it does not need human resources to deploy a VoIP network. With the optimized SIP architecture, PLANET VGW-420FS is the ideal choice for P2P/SIP proxy (IP PBX) voice chat, and ITSP cost-saving solution.