CPU operating system: embedded Linux OS Video compression format: MPEG-4 Signal system: PAL or NTSC Frame rate: PAL: 25fps NTSC: 30fps Resolution: D1 (720 x 576 pixels) CIF (352 x 288 pixels) FIELD (720 x 288 pixels) QCIF (176 x 144 pixels) Video adjustment: brightness, contrast, chroma, and saturation Sensor: 1/4-inch Samsung CCD Horizontal resolution: 420TVL Minimum illumination: 1.0 lux/F1.8,50IRE S/N ratio: >48dB Shutter speed: PAL: 1/50s- 1/100,000s NTSC: 1/60s -1/100,000s Zoom: 10 times optional zoom, f=3.8-38.0mm White balance: backlight balance, auto Video output: accepts external connection video output, BNC interface 1.0Vp-p/75Ω Lens: 10 times all in one Audio processor: one-way audio Audio gain (AGC) Network interface: RJ45 10/100Mb self-adaptable Ethernet slot delay time: >500 MSEL (0.50 second) in LAN Network procotol: TCP/IP, HTTP, ICMP, DHCP, FTP, SMTP, PPPoE, and more RTSP, supports RTSP 3G cellphone monitor (supports Nokia Symbian S60 system, Microsoft Windows mobile system) Simultaneous visitor supports 15 direct visitors at the same time, but no limitation when using forwarder server Network protocol: dynamic IP address, static IP address, PPPOE P/T P/T built-in RS485 P/T control Revolution angle: Horizontal: 360° Vertical: 180° Revolution speed: Horizontal: 280°/second Vertical: 100°/second