Physical description 

• Max 64 video in (PAL, NTSC)
• Max 64 audio in (linear in)
• 1 video out per channel (PAL, NTSC)
• 1 audio out per channel
• 1 line in (for voice talk)
• 1 10/100/1000M Ethernet
• support Up to 42 Hard Drives IDE/SATA/SCSI/RAID
• 8 or 16 alarm in 
• 4 alarm out 
• 1 RS-485 for keyboard, 1 RS-485 for PTZ control
• 1 RS-232
• 1 USB
• 1 VGA
• 19-inch case (450mm*450mm*95mm) (optional larger case for systems above 32 channels)

Function :
Aventura's DH5 series PC-based digital video recorder adopts a high performance Windows Embedded XP real-time multi-tasking operating system and hyperthreading CPU, to perfectly implement all the functions needed to build a surveillance system.

Compression function:
• Support maximum 64 channels video in. Each channel can be compressed independently in 25F/S (PAL) or 30F/S (NTSC), using H.264 algorithm. Both variable bit-rate and variable frame rate are supported.
• Support max 64 channels audio in. Each channel can be compressed independently, using an OggVorbis audio standard. The output bit-rate is 16 kbps.
• The output video and audio streams are integrated to generate the synchronized H.264 stream. Video and audio coincide with each other from beginning to end when the stream is played back.
• Supports following resolution on every channel:
  PAL:4CIF (704*576), DCIF(528*384), 2CIF(704*288),CIF(352*288), QCIF(176*144);
  NTSC: 4CIF (704*480), DCIF(528*320), 2CIF(704*240),CIF(352*240), QCIF(176*120)
• Supports multi-zone motion detection.
• Supports position configurable OSD & LOGO. Supports watermark.

Network Functions:
• Supports TCP/IP (ARP, RARP, IP, ODP, TCP, PPP, PPPoE, DHCP, SNMP, etc).
• Supports broad-band transmission (ADSL, etc).
• Supports narrow-band transmission (PSTN, etc).
• Streams of one or more channels, Net DVR's running state and alarm state can be accessed through network.
• Net DVR's parameters can be set through the network.
• Supports remote control of PTZ.
• Streams can be recorded in a remote host PC .
• Files in Net DVR can be downloaded to or remotely played in a remote host PC.
• Supports Net DVR remote upgrading.
• PC hosts can gain direct control of Net DVR's RS-232 or RS-485 port.
• Supports voice talk between host in surveillance center (back end) and Net DVR (front end)
• Supports embedded web server. Browser can be used to access Net DVR.

Storage Functions:
• Supports 6 kinds of record trigger mode: Schedule mode, alarm mode, motion detection, motion detection & alarm, motion detection | alarm.
• Won't lose frames when switch record files
• Supports hard disk sleep mode.
• Supports FAT32 file system. 
• Supports HDD smart
• Supports cyclic and non-cyclic record mode.
• Supports network access storage (NAS). 
• Supports USB flash disk, USB hard disk, USB CDRW for backup.

Preview & Playback Functions:
• Supports Monitor; Supports VGA;
• Switch quickly in preview mode;
• Supports partial zone sheltering;
• Supports local file Play and time play, support play fast, play slow, pause, play frame one by one, etc;
• Supports OSD, LOGO

PTZ control:
• Supports Pan-Tilt-Zoom control and Preset through front, keyboard and network;
• Supports most popular PTZ protocol;
• Ability to customize new PTZ protocol;

Alarm Functions:
• Supports Motion detectection alarm, switch alarm, signal lost alarm, exception alarm, etc;
• Supports setup of alarm related with PTZ preset;

Others:
• Support RS-485 interface keyboard;
• User-friendly menu interface;
• Multi-level user priority;
• SDK and DEMO software source code can be provided to reduce application development time.
  
  

  General Specifications
  Video Compression	H.264
  Voice Audio input	1 Channel, BNC ( Linear Electrical Level - Resistance:600O )
  Communication Interface	1 RJ45 10M/100M UTP Network - 1 RJ45 for RS232, 1 RJ45 for RS485
  Keyboard Interface	1 RJ45
  Serial Link Interface	1 RJ45
  HDD IDE Interface	SCSI, support 16 HDD Hot Swappable
  USB Interface	1, support USB1.1; Support U flash disk, USB HDD, USB CDR/W
  VGA Interface	1, Support 800 × 600/60Hz - 800 × 600/75Hz - 1024 × 768/60Hz
  Switch Alarm Input	Up to 32 (optional expandable)
  Switch Alarm Output	Up to 32 (optional expandable)