Video Surveillance, also known as cctv, breaks down in a couple different primary components:
- Analog (BNC) or IP (POE) based
- Wired or Wireless system
Let's take a closer look at both of these.
ANALOG CCTV SYSTEMS
Analog based systems use siamese cable wires to provide both video and power between each camera and the DVR storage device. Analog systems have been around forever and are what you will typically see at any big box retailer or wholesale club (Sam's/BJ'/Costco). They typically range in price anywhere from $350 - $600 for 4 to 8 camera systems. Below are some examples of typical resolution analog cameras will provide.
IP/POE BASED CCTV SYSTEMS
IP/POE systems are more commonly found in commercial settings. The cameras operate off CAT 5 or CAT 6 cable (internet cable). They have the capability to transmit video, data, audio, and power all on a single cable. IP cameras also can produce far superior resolutions when compared to analog. IP camera resolutions normally start at 2MP+, allowing them to produce crisp, clear, true HD images. Below are a few pictures of typical resolutions IP cameras produce.
WIRELESS vs WIRED SYSTEMS
Wireless cameras are not truly wireless as they require a power source to run each camera. There are a few cameras available that run off batteries, but they are very limited and only activate when motion is detected. To successfully keep each camera online, a strong and consistent wifi signal is required. Opting for a wireless cctv system will almost always require that modifications be made to the existing wifi network in place by way of a range extender or router replacement. Most wireless systems also only offer a cloud based storage option with a monthly cost.
Wired cameras (wired to a DVR/NVR) are far more reliable that wireless. Wired systems are able to provide a constant feed to DVR/NVR and continue to record even if the local internet connection fails. Wired systems also usually only require a power source and internet connection to the DVR/NVR itself, allowing it to act as the hub for the entire system. A HDD is included inside the DVR/NVR allowing it to hold weeks and longer of data that can be retrieved and exported in the even that something needed to be reviewed, shared, or saved. Also having a HDD on site eliminates the added cost of cloud storage.
Hopefully this article helps bridge the gap and makes your journey into the world of surveillance a little easier! Please feel free to comment or contact us directly with additional questions and feedback.