Features & Functions: One channel of bi-directional voice, video & audio synchronized 4 channels alarm input and 2 channels alarm output Support multiple resolutions:QCIF, CIF,and D1(4CIF),Can be switched online Resolution settable:1-ch:D1 or CIF,2-ch:D1 or CIF,4-ch:4 CIF or 1 D1+3 CIF Support remote control of PTZ camera Support remote surveillance through IP network. Low bit rate,high picture quality and good continuity Flexible bit rate and picture quality tradeoff setting All setting including upgrading can be done via network True embedded equipment,low power consumption,long-term reliability Video Video Compression Standard:H.264 Input:BNC ports,1,2,and 4 for 1-ch,2-ch and 4-ch models respectively Frame Rate:1-25 f/s (PAL) or 1-30 f/s (NTSC) per channel Resolution:PAL:QCIF(176χ144),CIF(352χ288),HALF D1(352χ576),D1(704χ576) NTSCL:QCIF(176χ120),CIF(352χ240),HALF D1(352χ480),D1(704χ480) Output:Support online adjusting bit rate according to bandwidth,from 20Kbps to 3Mbps per channel Audio Audio Compression Standard:G.726 Input:BNC ports,1,2,and 4 for 1-ch,2-ch and 4-ch models respectively Output:1 channel,BNC port Network Interface Standard:RJ45 Ethernet 10/100Base-T port Network Protocol:TCP/IP,UDP/IP, ICMP,DHCP,IGMP,IP Multicast Power Power Consumption:5V(DC),5W