HTDVS Network Video Server introduces MPEG-4/H.264 video compression, supports TCP/IP,UDP, transmits high quality video and bi-directional audio by RJ-45 interface, controls PTZ by RS485 interface with multi users visit via network in the security, 4 video inputs and 1 outputs, six alarm interfaces for defining as input or output, motion detection configuration, alarm and remote transmission, remote configuration, operation and IE browse.