Online Manual

Remote access CCTV via Internet

How to connect DVR/NVR via internet to watch CCTV cameras from a remote place

Remote viewing capabilities allow you to access and control your DVR from anywhere in the world via the Internet. Your DVR must be setup on a LAN before this capability can be enabled, and the LAN must have a high-speed connection to the Internet for efficient data transfer to occur. This procedure requires that the network router be configured to enabling port forwarding to your DVR. If your DVR is setup on a LAN serviced already, then you should configure the network for port forwarding. This video explains what is port forwarding, sometime called port triggering, and how does port forwarding work.

 

Source: https://youtu.be/zMnT1JoewHw

Max Cable Distance Voltage Drop Chart

CCTV cameras typically use 12V DC or 24VAC power supplies. Some security cameras are dual voltage which means that they can be powered by either 12V DC or 24V AC. AC and DC low voltage power supplies have limitations as to how far cable can be run before the voltage drops too low for your device to use. The maximum length that cable can be run for low voltage power varies based on these factors.
 

Low Voltage Power Drop Charts

Note: for both AC and DC low voltage, generally the maximum acceptable voltage drop is 10%. The below charts assume this.

12V DC Power Drop / Max Cable Distance Chart

The below DC voltage drop cable distance chart works as follows. The left column notes the amount of power that the device you are powering requires (red text). The “mA” after the number stands for milli-amps. For example, say you are using a CCTV camera that requires max 300mA. Using 18 gauge power cable, you can run your cable up to 289 feet.

24 AWG 22 AWG 20 AWG 18 AWG 16 AWG 14 AWG 12 AWG
DC 100mA 216 ft 342 ft 594 ft 867 ft 1,379 ft 2,197 ft 3,508 ft
DC 200mA 108 ft 171 ft 297 ft 433 ft 689 ft 1,098 ft 1,755 ft
DC 300mA 72 ft 113 ft 198 ft 289 ft 459 ft 732 ft 1,169 ft
DC 400mA 54 ft 85 ft 148 ft 216 ft 344 ft 549 ft 877 ft
DC 500mA 43 ft 68 ft 119 ft 173 ft 275 ft 439 ft 701 ft
DC 750mA 28 ft 45 ft 79 ft 115 ft 183 ft 293 ft 467 ft
DC 1000mA 21 ft 34 ft 59 ft 86 ft 137 ft 219 ft 350 ft

 

24V AC Power Drop / Max Cable Distance Chart

The AC voltage drop cable distance chart works the same way as the DC one. However, most 24VAC power supplies are measured in voltage amps (VA), or Watts. The formula to convert voltage to watts is Watts = Amps x Volts. We have provided the conversion for you below the W value in the column on the left. For example, 10W is the same as 417mA.

Using the below chart, you can see that if you are using a AC powered or dual voltage security camera that requires up to 417mA of power, you run 18 gauge power cable up to 451 feet

24 AWG 22 AWG 20 AWG 18 AWG 16 AWG 14 AWG 12 AWG
10 W (417mA) 103 ft 283 ft 286 ft 451 ft 716 ft 1,142 ft 1,811 ft
20 W (833mA) 52 ft 141 ft 142 ft 225 ft 358 ft 571 ft 905 ft
30 W (1,250mA) 34 ft 94 ft 95 ft 150 ft 238 ft 380 ft 603 ft
40 W (1,667mA) 26 ft 70 ft 71 ft 112 ft 179 ft 285 ft 452 ft
50 W (2,083mA) 20 ft 56 ft 57 ft 90 ft 143 ft 228 ft 362 ft

Most Important Parameters of CCTV System

When choosing CCTV System, you may see the detailed information about the products. Below are the most important parameters you need to care about:

IR distance depends on the quantity of leds and its power.

For same size led, more quantity, further IR distance. Most cameras are with 15-40 meters IR distance. For big lens cameras, can reach 50-100 meteres. There are two kinds of led in the market:common LED and the 3rd LED Array. The 3rd LED Array has less quantity but further IR distance. It can save more energy but a little expensive than common led

Resolution Video Quality Frame Rate (FPS) Bitrate (KBPS)
320×240 (QVGA) Medium 12 ~ 15 207
352×240 (CIF) Medium 12 ~ 15 384
640×480 (VGA) Medium 12 ~ 15 768
704×480 (4CIF) Medium 12 ~ 15 1024
1280×720 (720P) Medium 12 ~ 15 2048
1280×960 (960P) Medium 12 ~ 15 2048
1600×1200 (2MP) Medium 12 ~ 15 2560
1920×1080 (1080P) Medium 12 ~ 15 3072
2048×1080 (2K/2.2MP) Medium 12 ~ 15 3072
2048×1536 (3MP) Medium 12 ~ 15 3072
2688×1520 (4MP) Medium 12 ~ 15 4096
2560×1920 (5MP) Medium 12 ~ 15 5120
4096×2160 (4K/8MP) Medium 12 ~ 15 8192
The IP Rating system provides a means of classifying the degrees of protection from dust, water and impact afforded by electrical equipment and enclosures.
 
null

Vari-focal lens and Fixed lens

2.8~12 mm, 2.8 mm, and 3.6 mm are common lens for Digitalnet Cameras.
Small lens has wide view angle,but short view distance. Big lens has narrow view angel,but long view distance. Details as below:
 

Lens 4 mm 6 mm 8 mm 12 mm 16 mm
Angle 69.9˚ 50˚ 38.5˚ 26.2˚ 19.8˚
Distance 0 ~ 6 M 5 ~ 10 M 10 ~ 20 M 20 ~ 35 M 35 ~ 50 M

null