Case of Carton, HD Monitoring Screen

13 cameras are transmitted to NVR, and considering that the bandwidth required in the line has a big relationship with the camera's code stream. Common 2 megapixels, H.264 code streams are 4m, and the H.265 code stream is 2m. The peak bandwidth requirements of the camera = the code stream × 120%, and the peak bandwidth can ensure the stable use of the camera; the NVR is added to the IPC's main code stream and sub-code stream. The actual bandwidth of the switch does not exceed 70% of the maximum rate of the port, that is, the 100M interface is recommended no more than 70M bandwidth; the Gigabit Interface is recommended no more than 700M bandwidth. Calculation broadband coded with H.264: 8-port 100M switch: 4.5M (main code stream + sub-code stream) * 5 * 120% = 27m, 100M switch can meet the needs; 16-port Gigabit switch: 4.5m * 8 * 120% + 27m = 70.2m, the Gigabit switch can also meet the needs. cause of issue Based on bandwidth computing, the front-end configured camera, 100M switch, gigabit switch is no problem. But the subject adopts fiber optic transmission, then the problem is coming, is there consider bandwidth? So the cause may be: 1 Optical fiber transmission, the transceiver chosen 100g transceivers According to the above calculations, the 16-port gigabit switch is 70.2m, which has exceeded the limit of 100M port, so the transceiver must also use Gigabit transceiver to ensure the transmission of Gigabit transceivers. stability. 2 The backend core switch uses a 100M switch The backend core switch is a data forwarding center of the entire network, carrying a large number of data streams, which will monitor data streams and transferred to NVR. If you use a 100M switch using a node using a Gigabit core switch, it may result in monitoring Abnormal Carton. 3 Monitoring the local area network to access other Internet equipment The monitoring network is generally planned according to the high-definition of the camera. If other Internet access is accessed, the unsmailing speed will occupy the asymmetric upload rate, with a large bandwidth requirement, will seriously affect the stability of the monitoring screen. 4 Camera IP address conflict It can be tried to make settings through the batch configuration tool software, check the device that needs to modify the IP address, fill in the start IP, port, subnet mask, gateway and other information for modification. 5 network cable and crystal heads standard The quality problem of inferior network cable will result in serious data loss, and the crystal head is not hit, causing the port contact unstable, it is recommended to re-tap the crystal head test. Read more

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