... web function(Support DHCP,PPPOE,FTP,DNS,DDNS,NTP,Email,IP authority,IP search,web alarm center),(WEB,client viewer) Feature:Support ... 1channel,linear input Audio Compression G.711 Audio Output 1channel,RCA interface,linear output Audio talk-back Built-in Mic12. Supported ... Protocols TCP, UDP, IP, HTTP, FTP, SMTP, DHCP, DNS,ARP, ICMP, POP3, NTP, IPsec ...