Modern analog systems pair analog cameras with a DVR (Digital Video Recorder). The cameras transmit an analog CCTV signal over standard coaxial cable. The DVR digitizes the video so it may be stored electronically. These cameras are very affordable. The most popular ones use Sony Technology. These cameras are still the most widely used due to affordability. Analog are limited to a resolution of 0.3 megapixels.
IP cameras are easily distinguished by the Ethernet jack. IP cameras do not share the same 0.3 megapixel resolution constraint as analog cameras. Northeast Remote Surveillance, LLC typically uses on cameras with 1.3 megapixel or higher resolution. Megapixel IP cameras can be utilized on every DVR and NVR system we build. The most basic 1.3 megapixel camera we use produces 4 times the information on the recorded image than an analog camera. What does this mean to the end user? Have you ever tried to enlarge a picture and it ends up a blur? With a megapixel camera you can enlarge the same picture with out the image becoming instantly going blurry. The more pixels you have the more you can enlarge the picture before the image distorts. What this means is you can now extract a license plate or other small details from a larger picture without having to use a zoom lens. http://www.avigilon.com/products/samplefootage/ (link is external)
We utilize many different cameras from a wide variety of manufactures you cannot expect anyone manufacture to provide the best value in any one application. No matter what cameras fit your budget at the time of installation we will always be able to upgrade equipment and relocate existing cameras to grow the system, you will never have to discard item.
Remember, all IP cameras are not all created equally. Some IP cameras have are basically low resolution web cams having little or no value in a Commercial Surveillance System. Many of these IP cameras are also limited to 0.3 megapixels. We typically do not bother with IP cameras less than 1.3 megapixel. To read about the megapixel advantage, please click here.
Aside from the image quality, network cameras offer greater scalability and may be installed using various networking topologies. With analog cameras, every single camera needs to be cabled with a “home run” from the camera to the DVR. With the power and flexibility harnessed from networking technologies, such as switching, power-over-ethernet (POE), and wireless networking, Northeast Remote Surveillance can install cameras virtually anywhere within a few hundred feet of a power source.