The DP-104 is a versatile, standalone SIP door station engineered for seamless residential security and enterprise-grade access control. Built on the standard SIP protocol, it integrates effortlessly with SIP IP PBX systems, making it a robust endpoint for unified business communications. For modern convenience, the DP-104 features cloud connectivity via the VBELL App, enabling users to engage in real-time two-way audio and execute remote door unlocking from any location with internet access.