Published at Monday, 25 September 2017 by olga in Security systems, with total 27 digitals.
• DVR. This is a hard drive that allows you to record and playback the video feed from the security system. When the memory becomes full, the new video signal will then overwrite the oldest one. There are some systems that have memories large enough to record 150 days worth of footage.
The first security camera was a c-mount security camera, and they were first introduced in the 1970. Perhaps it was the fact that fashion was not at its high that these boxy, bulky security cameras look the way that they do, but it had more to do with the technological limitations of the time. As camera technology was in its infancy, chips sets and circuit boards were much larger than today, which rather restricted security cameras to the c-mount camera style. For many years, c-mount camera design defined the security camera industry, but now the most common shape that most people think of when mentioning a security camera is the bullet camera.
C-mount security cameras are very effective when used indoors, but face challenges when used outdoors. To be used outside, c-mount cameras need special mounting brackets to fix them on the wall and housings, as c-mount cameras are very susceptible to the environment.