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Anonymous Poster #1

CCTV Network

02/22/2015 12:51 PM

Hi,

These days CCTV systems are coming with higher resolutions in megapixels range because of advancement in digital systems.

But it appears that there is one serious drawback. If network goes down in an analog CCTV system, DVRs are still recording the cameras. But if the network goes down in a digital CCTV system, video is lost from all the cameras.

What could be the solution - if still we need to keep digital CCTV system.

Regards,

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#1

Re: CCTV network.

02/22/2015 12:56 PM
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#2

Re: CCTV network.

02/22/2015 1:41 PM

Redundancy is the only solution, but that also requires redundant power source (UPS works for this).

If you have a single camera, that is no different then a single network. So you need to make the whole system dual, with no common mode fault connection between them.

At least that's what you would do for a system that needed to have essential integrity/availability.

Critical systems have triple redundant implementations.

But your problem exists with any resolution, so why is higher resolution an issue?

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#3

Re: CCTV Network

02/23/2015 1:10 AM

Backup in the name of the game .... Murphy's law, if something might fail, it will!
On camera use, I normally combine a wide angle camera set up and a closeup camera looking at the same scene to catch hi res heads, number plates etc. With cameras being so cheap, even the tracking and self zoom systems, then these are other options.
I also have cameras with built in SD card record systems .... how far do you want to go?

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#4
In reply to #3

Re: CCTV Network

02/23/2015 4:38 AM

I would agree with the local storage of data in the camera, as long as the observed miscreants are not themslves able to get at the camera. Otherwise I see the solution as a recorder for each camera sensor placed at the other end of a short wire.

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#5
In reply to #4

Re: CCTV Network

02/23/2015 8:16 AM

Here is one CCTV with inbuilt DVR recording solid state to a SD card ... and then connected to a network etc (by cable or wireless link) and the main DVR.

With the cost of these units so relatively low, use 2 cameras at the same location ... one secret (covert) and the other obvious (overt).

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#6

Re: CCTV Network

02/23/2015 8:50 PM

may be you can add private and secure wireless fidelity for your digital CCTV to make sure the network doesn't go down.

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