Taipei, Taiwan. Oct 1, 2006-Sanyan Computer, one of the worlds leading system solutions/design/manufacturers of Surveillance products, recently announced the delivery of Industrial Networking DVR (Digital Video Recorders) SL521-S1/S4/F2/F4 Hardware Encoder Server and SL511-V1/V2/V4 Hardware Decoder Server series to the Video Surveillance market. Both SL521-S1/S4/F2/F4 and SL511-V1/V2/V4 are 1/QUAD/2/4-channel hardware Encoder/Decoder Server that adopts the high performance MPEG4 compression/de-compression algorithm, real-time D1 video quality and features DIN-Rail or Wall Mounting capability , Also available is the 8 digital input/output (DIO)module for sensor/alarm control. This makes SL521/SL511 especially suitable for multiple sites distributed remote/centralize Ethernet-based CCTV system and unmanned location or SCADA , process control, FDA validation, environmental monitoring system, traffic video monitoring applications.In addition, SL521/511 series bundle free Longeye application software which provides UDP streaming, LAN /Intranet multicast or unicast streaming protocol, CCD camera preview/recording/motion detection, RS485 PTZ camera control, DVR storage file download/playback and IP network management function, making the security and control of your video networking surveillance system more efficient.The Sanyan SL521 Surveillance system uses MPEG4 compression technology to meet the expanding demands of synchronal surveillance applications. Both SL521/SL511 can process in real-time 30 frames/sec at 704 x 480 NTSC resolution (max. bandwidth of video 2M bps, audio 384K bps) to provide high video/audio performance data transmission.