... image or external alarm devices can be transmitted to external network and meantime can be recorded locally, together with ... RateAdjustable Frame Rate (1-25/30 frame/sec) and bandwidth according to network traffic.ProtocolSIP, TCP, UDP, DNS, DHCP, ... -TX Ethernet RJ-45Data portRS-485 used to control PTZ, and RS-232 used for two-way data transfer ... 3.5W Internet security system for chain store and home