Since today's DVRs can be fine tuned just the way you want it is rare to find one that is not running in motion activation mode any more. All DVRs these days will also allow you to adjust various motion activation settings to minimize common issues like false alarms. At the very least, you can skip over all those hours where you know nothing even happened. That's when you see a list of motion recordings sorted by times and dates, and organized by which camera captured them, and you begin to appreciate the amount of time you saved yourself while investigating several hours of video footage. Motion activation doesn't seem like a very important feature until it's time to play back your recordings. It all depends on the context of the alert. When users receive an alert like this, they might check their camera feeds for more information, or maybe they will immediately send someone to the location. DVRs will also send out some kind of notification message using motion activation or some other event, like a damaged camera alert, for example. Speaking of travel, it has become more popular to use phones and tablets to view these video feeds, instead of relying only on computers, since most DVR devices have surveillance apps these days. Conversely, entrepreneurial types will check on their business from home, or while they are away on vacation. Some people will check on their home from work, which is known in daytime talk show lingo as "nanny cams". Having an online video feed from your DVR allows you to "remotely" watch your property at any time. To keep this article brief, I will focus on these universal features of a DVR, instead of listing countless industry-specific tweaks that are only relevant to a few special cases. This online capability, along with video motion activation and memory overwrite are the most important features for DVRs. Usually, a DVR will be connected to an internet service for online access, assuming there is internet available at the site. The typical DVR will record hundreds of hours of video onto a Hard Drive, with the exact time determined by the amount of memory in that Hard Drive. As such, let us leave that debate to individual customers and their qualified installers to sort out. Of course, every option has its own advantages, and every type of application could favour a different kind of setup. Maybe the customer doesn't even connect a monitor to the DVR and just leaves it recording constantly until something happens. Maybe they would rather have two monitors displaying 8 images each, rather than one monitor with 16 tiny images squeezed onto one screen.
Maybe these customers are expanding from 4 to 8 cameras and they just add a second 4 channel unit instead converting over to one 8 channel unit.
Our customers have usually bought a second smaller DVR instead of one huge one. The most common DVR models come in 4 or 8 channel versions, but there are also other models as well (like 32+ channels).
This one is available on our own website: Here is just one example of a simple CCTV system. While addressing these functions, I will use past customer inquiries as a guideline as to which technical details to address. Yet, however sophisticated a system may be, the individual parts still perform very similar functions.
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The biggest difference from any one system to another, is that as you get into higher numbers of cameras, the hardware and software become more sophisticated and thereby more expensive. Pretty much every video surveillance system you see would be some variation of the same setup described below. Since any DVR usually does about the same job, you'll find that variety mainly comes in the form of the different types of cameras you can use with this machine. Overall these CCTV systems are made up of a Multi-Camera "DVR" (Digital Video Recorder), with anywhere from 2 or more cameras attached to it. You can find them in most buildings and even outside in the streets. Multi-camera CCTV systems are everywhere.
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