AddPac IP video door phone solution is to control the visitor access through video screen which can be installed at the entrance with internet connection. Video door phone (AP-VAC20, 50, 100, 200) uses SIP standard VoIP signaling process function to interwork with AddPac video door phone access control server (AP-ACS1000), video phone, and soft phone to provide an excellent scalability. Also, it supports the latest audio/video codec at optimum level. IP video door phone selection standard is to accept the VoIP standard signal and convenience. AP-ACS1000 Door Access Control System offers the enterprise level IP video access solution.