Answer
Apr 18, 2025 - 03:20 PM
The terms NVR and DVR both refer to video recorders commonly used in the CCTV industry. They perform similar functions, offering features like remote viewing and advanced AI capabilities. Both record video to hard drives and come in configurations of 4, 8, 16, 32, and 64 channels. The primary difference between an NVR and DVR lies in the type of cable used for video transmission. DVRs (Digital Video Recorders) use coax BNC fittings and handle digital video formats such as TVI, CVI, AHD, and analog. In contrast, NVRs (Network Video Recorders) are equipped with RJ45 network ports, allowing the use of Cat5 and Cat6 cables. These cables transmit power from the recorder via PoE (Power Over Ethernet) to IP PoE security cameras and send digital video signals back to the recorder on the same cable. NVRs simplify installation by combining data and power transmission in one cable. Conversely, DVRs do not transmit power to coax security cameras, necessitating two separate cables for data and power. This distinction makes NVRs more suitable for modern IP camera setups, while DVRs are often used with traditional analog systems.
