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  • Writer's pictureTom Wileman

CCTV: What Is It And How Does It Work?

CCTV, also known as closed-circuit television, is a system that is put in place that allows you to monitor what is going on around your home or business. Cameras and monitors give you access to a live view of anything that’s happening, and recorders keep an archive of footage that can be viewed at any time for later reference.

Technology for CCTV has been around for decades however, over the years the technology involved has come on leaps and bounds making it much more effective and adding in the capture of many criminals allowing them to be brought to justice for the crimes they have committed.

CCTV Systems

Security cameras are used to capture footage, they are particularly useful if your property is in a vulnerable or high crime area, or if you have high value items that would make your property a target. There are different varieties of CCTV systems to choose from, all serve slightly different purposes and will so it will be easy to find one to suit both your needs and budget.

Wired Security Camera – These cameras transmit footage via cables and provide video surveillance, however the transmission range is 300 Metres so the signal will be significantly weaker beyond this point. This can be overcome by using signal boosters, networking cables, switches. You can have several cameras connected to a single monitor.

Analog Cameras – this is the most common type of CCTV Camera and it has been around for years; they are basic cameras that store video footage onsite.

Internet Protocol Cameras (IP) – These are similar to analogy cameras only they are capable of a lot more. They show higher resolution images and include features such as remote zoom and repositioning. There is also the option of viewing footage online, so you can monitor your property any time anywhere from a computer or smartphone. With more features and perks it goes without saying these cameras do come with a higher price tag.


All CCTV cameras will require some sort of cabling, even the wireless ones. Cables are used to link the different pieces of equipment together such as, recorders, monitors, modems and wired cameras.

Video Recorders

By having a recorder, you can be sure that you will never miss anything that is happening at your property. You can set your cameras up so that everything is recorded, however this does use up a lot of valuable storage space, particularly if nothing is happening for long periods of time. It would be a good idea to set your camera up to record either when they detect movement or at certain times of the day. There are two options that come with video recording, DVR and NVR.

DVR – is also known as digital video recorders, this is the modern replacement for analog recorders that use video tapes. These recorders capture footage from an analog camera in a digital format, once the disk gets full it will automatically record over the oldest footage first.

NVR – Also known as network video recorders work in a similar way to DVR’s only, they are compatible with IP cameras. The NVR and cameras connect via a network or router and footage can be accessed via an app or computer.

Display Unit

In order to view the footage from your CCTV cameras you will need to have them connected to either a tv or a monitor, this can be a simple monochrome screen or a full HD colour monitor, its down to personal preference really. If you have IP cameras, then footage can also be viewed remotely via a computer or smartphone.

Whatever your goals for a CCTV system you can be sure to find the right one for your needs, contact our team at Goliath Security & Electrical today for advice and assistance choosing a suitable CCTV system for your home or business call Goliath Security & Electrical today on 0151 662 0208

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