Hikvision NVR ( network video recorders) are similar to a DVR with one major exception, the signal is carried digitally between the camera and the recorder ( NVR) much like linking your office computers and mobile devices to your WIFI at home whereas DVRs ( digital video recorders) only record the signal in digital format. This can be compared to the digital TV switchover which ended the "snowy" or ghosting pictures. The same applies to digital CCTV systems. Any CCTV product attached to the NVR has to be "network " or "IP" ( internet protocol) compatible.
Buy Hikvision NVR with PoE
You can tell the difference between an NVR and a DVR from the back connectors. A Hikvision NVR has RJ45 connectors also known as network or ethernet connectors as shown in the picture below.
Hikvision NVR with connection for IP cameras
The downside of IP CCTV systems is the cost, difficult to fault find if you don't have little some networking skills or can't use a computer. Also, you can't take out an NVR made by one manufacturer and replace it with another. The same applies to IP cameras.
Nearly all of our Hikvision NVRs have built-in PoE ( power over ethernet ) which means there is no need to buy a power supply to power the cameras as its built into the NVRs Only one cable is needed between the IP camera and the Hikvision NVR, this cable is called CAT5/6 or network/ethernet cable as shown in the picture below. This Ethernet cable can also carry sound and other control signals and also have additional devices connected to the IP cameras such as control relays for switching other devices.
The cable used for IP/network cameras
The Hikvision IP cameras can also be connected to the NVR using a power line plug or a HomePlug as its sometimes called. This is very useful when you have an area where it's difficult or impossible to cable such as a garage next to your home. You can buy a home plug kit and one plug into your mains socket near your router and the other in the mains socket in the garage. You will also need a power supply to power the camera which would connect to the homepage.
HomePlug can be used in place of cables
There are currently 2 main choices of Hikvision NVR, The "K" series which supports up to 8MP Hikvision IP cameras and the "I" series Hikvision NVR which supports up to 12MP. For example DS-7608NI-K2/8P or DS-7608NI-I2/8P. The "K" Series NVR is designed to be a middle-level product while the "I" series is the high end product.
Some Hikvision NVR Terminology
Recording Resolution - The resolution of a camera tells us how many million pixels will be in its images. 8MP = 8 million and 12MP = 12 million. Currently, the highest resolution available in Hikvision IP Camera is 8MP. This is really high quality and pretty much the best consumers can get on the market for a CCTV system.