Digital Camera Survey

Digital Camera Survey

If you want to establish a Digital Camera in any office, you must survey the premises. You have to ask client to show you the coverage area then you have to calculate how many cameras need to establish for this project. According to device you have to calculate all other required devices

1. Camera:
First you have to calculate how many devices need to accomplish this project. There are different brands of digital camera. Depends on area size and taste of client, you have to choose the device and number.
There are also indoor and outdoor camera. For outdoor you have to choose Bullet with housing.

2. Switch:

How many switch you need you can calculate easily. There are 5, 8, 16, 24, 48 ports in a switch. If the number of wireless devices are 1-7, you can easily cover with 8 port 1 switch. If the number of wireless devices are 8-15, you can easily cover with 16 port 1 switch. Devices are 16-23, one switch 24 port. 1 port is always use as up-link
If number of switch 2 then your up-link port required 3. So calculate this way and you will get the number of switch you need for this project.

3. Patch Panel:

Patch Panel depends on the number of 24 ports switch. On the other hand if the total node is 20-24 then you can use 1 patch panel. It's costly so don't misuse 1 patch panel for few nodes.

4. Wire Manager:

Number of Patch Panel. Or You can use it for decoration where cable looks odd.

5. Patch Cord 1 meter:

Number of using ports of Patch Panel. If no Patch Panel then no Patch Cord 1 meter

6. Cabinet Rack:

There are different sizes of rack 6U, 9U, 12U, 24U, 36U, 48U. Depends on total number of Switch, Patch Panel and Wire Manager you have to decide how big rack you need to setup. Each device take 1U space. For one Switch, Patch Panel and Wire Manager will take 3U and 1U space for device gap. So you need only 4U space. Then 6U is enough but if you keep UPS inside rack then you can use here 9U rack-1.

7. RJ 45 Connector:

Twice of the devices and 2 for each up-link and always keep few connectors extra for setup time or future use.

8. UTP Cable:
Depends on the Summation of all device distance from rack. That's way keep on eyes the cable routes for each devices.

9. Multi pin Socket:
Depends on the number of device and rack.  If your camera supports PoE (Power over Ethernet), In that case you can connect power from Power Strip (Multi-plug) in Rack with PoE Injector

10. Back Box:
Depends on number of Multi pin socket

11. Power Cable 23/76:
Depends of the distance start from the rack to all devices connected from the rack.
If two devices connected same direction from the rack. one is 10 meters away and another is 15 meters away. So power cable need 15 meters.
If both devices are different direction then you need 25 meters power cable

12. UPS:
Depends on number of Rack. There are different types of UPS 650VA, 1KVA etc. For normal use 650VA is enough.

13. Housing with Stand:
The Number of Camera at outside.

14. Hard Disk

According to storage. See below how to calculate storage space

15. Monitor
Depends on how big you want to view 

16. Recording Server:
Digital Recording Server is different. It called NVR. You can purchase a NVR or you can record this in a Desktop Computer with recording software. If you have more than 64 camera in that case, to view output you need a CMS Control Monitoring Software.

N.B: Channel, GI pipe, PVC Pipe, Flexible Pipe, Royal Plug, Screw, GI wire, Electric Tape, Cable Tie Etc. - As Required

Storage Calculation:

Storage Space (GB) = FrameSize (Kb) * 1024 *FPS * Cameras * Days * Hours/day * 60 * 60* Activity * / 1000 000 000

For Digital Camera:

** If Video Encoding = H.264 and FPS = 25 with video quality = Medium Then,

1 camera for 1 day required for screen resolution 1 MP, storage size is 60 GB

And for screen resolution 2MP, storage size is 89 GB

Bandwidth Require for Camera:

Bandwidth (Mbps) = FrameSize (Kb) * 1024 * 8 * FPS * Cameras / 1000000

For Digital Camera:

** If Video Encoding = H.264 and FPS = 25 with video quality = Medium Then,

1 camera for 1 day required for screen resolution 1 MP, Bandwidth required 2.79 Mbps

And for screen resolution 2MP, Bandwidth required 4.11 Mbps


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