The answer to expensive, outmoded, analog CCTV surveillance systems has arrived. When coupled with D-Link’s high-resolution and feature-rich IP cameras, the Network Video Recorder (NVR) offers a comprehensive video display, storage, and management solution. The D-Link NVR provides reliable high-quality remote monitoring functionality at a fraction of the cost of conventional surveillance systems.

Instant Live View
D-Link’s  intuitive  GUI  interface  simplif es  viewing  live and  recorded  video  from  the  NVR.  The  camera  status page shows connection and recording status, along with frame rate and bit rate information for each camera. Total available  recording  time  for  the  system  is  also  clearly displayed for each NVR.

Live Monitoring & Camera Adjustment
Users are provided with a variety of options for viewing and organizing camera footage on-screen. For a system with multiple channels, users can simply drag and drop selected  cameras  to  the  viewing  area.  Camera  names and  recording  status  is  displayed  via  OSD  to  aid  in identif cation. Presets  from within  the  interface can be set to instantly restore a previously saved view. A single camera may be viewed full-screen with optional two-way  audio.  Users  can  control  pan/tilt/zoom  (PTZ) functions  from within  the  interface  using  the  provided interface buttons or by directly clicking on the video.

Extensive Recording Functionality
A clear single-page  interface assists with conf guration including compression, resolution and  frame rate  for all connected cameras. The NVR records video  from up  to 4  local  and  remote  IP  cameras. A  total  of  4 NVRs  can be combined and administered with D-Link’s bundled 16 channel management software.

Once cameras have been set up, a highly conf gurable
scheduling  system  allows  for  continuous  recording  or recording  during  specif cally  allotted  timeframes.  Each camera  can  be  set  to  record  independently  at  preset intervals. The DNS-726-4 also provides event  recording based on specif c triggers.

The  NVR  can  be  conf gured  to  overwrite  the  oldest data automatically when HDD space  runs out, allowing for  continuous  and  uninterrupted  recording. Users  can specify the number of days the recording should be kept (within the limits of the HDD capacity). For example, if the NVR has the capacity to store 7 days of recording, using the overwrite option, the NVR will record the 8th day and
delete the 1st day.

The  NVR  also  provides  the  option  to  stop  recording when  the  HDD  is  full.  Should  the  disk  reach  capacity, a  notif cation  can  be  sent  via  e-mail  or  to  an  external device such as an audible alarm or LED display via  the DI/DO interface.

Powerful Event Management
The  NVR  centrally  controls  the  digital  output,  e-mail notif cations  and  recording  for  all  the  connected cameras.  Input  triggers  from  camera motion  detection or digital input interfaces can additionally be monitored. These events will be  logged, with optional notif cations via e-mail or output devices. Users can set up multiple contact  lists  for  event  notif cation.  A  straightforward logging system organizes events by date for easy recall.

Intelligent Playback
Searching  through  recorded  data  can  be  tedious  and frustrating.  However,  the NVR’s  smart  search  function makes detecting notable events effortless. By selecting a target area on the video and setting search sensitivity, the smart search will traverse the video database based on specif ed search criteria to locate noteworthy events. Search criteria include options such as motion detection,
missing  or  abandoned  object,  lost  focus  or  camera occlusion. (DNS-726-4 only)

After selecting a desired video period for display, the NVR can  instantly  begin  playback.  The  DNS-726-4  supports 4  channel  simultaneous  playback  and  the  DNS-722-4 supports  1  channel  playback.  Playback  speed  control allows for up to 16x speed fast forward or fast backward play.  The  step  playback  option  displays  one  frame  at a  time.  Additionally,  users  can  enhance  the  recorded video  with  controls  such  as  brightness,  contrast,  and sharpness.

During playback,  if a user uncovers video  that needs  to be exported,  two  formats are available. The AVI  format will export raw video. The ASF f le format will transpose a timestamp on the exported video. If a printer is connected to the user’s PC, the NVR can also print the selected still image.

Comprehensive Data and Hardware Security
The  D-Link  NVR  ensures  the  security  and  integrity  of IP  camera  footage.  Administrators  may  flter  external connections  to  the NVR  by  IP  address,  limiting  access and  thus  increasing  security.  Administrators  may  also choose  access  privileges  for  users  by  specifying  the cameras  they  may  access  to  for  live  view,  playback, audio and PTZ functions.

Recorded  data  is  stored  in  a  secure  database.  This recorded  data  can  be  backed  up  to  additional  storage locations  periodically  or  whenever  needed.  The  NVR also  includes  the option  to protect data using a RAID 1 confguration. RAID 1 duplicates the recordings database onto two separate drives. In the event of an HDD failure, data integrity is maintained on the secondary HDD.
A UPS can be used as emergency power supply for the NVR.  The UPS  uses  a USB  interface  to  notify  the NVR to perform a proper shutdown before battery power runs out.  In  the event of a power  failure without a UPS,  the NVR will boot up automatically once power is restored.

Of  course,  the  security  of  data  is  irrelevant  unless  the device  itself  is protected from theft. For this reason, the sleek NVR enclosure is compact and easy to conceal in a secure remote location. A front panel lock protects the HDD and a rear panel lock can be used to secure the NVR with a cable.

Complete Network Functionality
The  D-Link  NVR  takes  advantage  of  existing  network architecture, taking advantage of features such as PPPoE and ADSL services. The NVR can acquire an IP address from a DHCP server to become easily searchable during installation.  Dynamic  DNS  is  supported  for  systems operating without a fxed IP address. The NVR can then be reached from the internet using an easy to remember domain name provided by the DDNS service. Maintaining  an  accurate  record  of  time  is  essential if  recorded  data  is  to  be  used  as  evidence.  To  ensure that the recorded time is always accurate, the NVR can update  the  system  clock  from  an  internet  server  using the Network Time Protocol (NTP).

D-ViewCam NVR Software
The D-ViewCam NVR software bundled with  the D-Link NVR  consists  of  three  main  components:  Playback Manager,  Backup  and  File  Manager,  and  Multi-NVR Viewer. The “Multi-NVR Viewer1” supports simultaneous display of up to 16 channels. Easily organize the view by directly  dragging  and  dropping  video  onto  the  display window. Cameras managed by  the NVR can be viewed as  individual  sites  or  categorized  into  groups.  The “Playback Manager”  includes  a  clean  and  simple web GUI interface that allows users to play, search or export video. The Backup and File Manager” is a fexible backup utility that simplifes the process of backing up video data from the NVR to external storage.

Network Setup Using D-Link NVR

4 Channel Live View