| Video Cassette Recording (VCR) | | | | analog cameras, time-lapse VCRs and monitors. A |
| Today, security camera system may consist of | | | | coaxial cable runs from each camera to a multiplexing |
| many different products and technologies. Many | | | | device, which allows multiple cameras recording to |
| suppliers build pieces of the system, whether it is | | | | one VCR, with a monitor for viewing. The time-lapse |
| part of a hybrid analog/digital implementation or an | | | | VCR allows the operator to adjust when the VCR |
| end-to-end networked IP solution. The following | | | | records so the standard two-hour VHS tapes can he |
| sections explain the evolution of the CCTV system, | | | | used for much longer. The trade-off results in |
| starting with a fully analog system and adding | | | | lower-quality images in return for less frequent tape |
| components until it achieves networked capability. | | | | changes or image overwriting. |
| A traditional analog surveillance system consists of | | | | |