DVS 1.Support 1 channel video signals 2.D1 resolution 3.RS485 port &1 RS232 port 4.auto image capturing and alarm Digital Video Server Feature: ... powerful RTOS, realize industrial level MTBFD1 High Definition digital video server, fully compatible with Half-D1,CIF and QCIFOptimized MPEG4 ... function(Support DHCP,PPPOE,FTP,DNS,DDNS,NTP,Email,IP authority,IP search,web alarm center),(WEB,client viewer)