A VoIP gateway is a device that connects traditional telephone networks to internet-based communication systems. It converts voice signals from analog phones into digital data packets, allowing for voice over internet protocol (VoIP) calls. This enables users to make phone calls over the internet, reducing costs and improving call quality. In addition to converting signals, VoIP gateways can also manage call routing and provide features like call forwarding and voicemail. They serve as a bridge between different communication technologies, making it easier for businesses and individuals to integrate their phone systems with modern internet services.