... protocols:HTTP, TCP/IP,UDP,SMTP, DDNS, DNS,SNTP,DHCP,FTP, SNMP One Channel two-way audio Exceptionally self-recovery function ... )FunctionNetwork ProtocolsTCP/IP HTTP RARP TCP ICMP DHCP UDP SMTP FTP DDNSPOEoptionalOSDsupportMotion DetectionSupportPasswordSupportPeripheral device connectionVideo,Audio1channel audio input,1channel audio outputAlarm ...