JVC VN-H157WPU Instruction Manual - Page 6
Network, continued, Camera Setting Requirements
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Camera Setting Requirements Network (continued) Insufficient Network Bandwidth When there is insufficient bandwidth, the number of JPEG frames (frame rate) that the client can acquire will decrease. Also, the image distribution will delay. In the case of H.264/ MPEG-4, noise interference may occur and playback may fail. Network Delay When the client acquires JPEG via TCP, camera will send out data while checking the ACK from the client at the same time. For networks with considerably delay, data cannot be sent out until ACK is received, and therefore the frame rate will drop. In the case of H.264/MPEG-4, noise interference may occur and playback may fail. A decrease in the frame rate due to network delays can be eliminated by receiving data via multicast. Network Jitter When there is considerable network jitter, delay time may be prolonged and the image frame rate may drop. In the case of H.264/MPEG-4, noise interference may occur and playback may fail. Packet Loss When acquiring images from camera via TCP, packet loss may be recovered by TCP transmission. When there is considerable delay in the network, however, data may lost and the image frame rate may drop. In the case of H.264/MPEG-4, noise interference may occur and playback may fail. If a packet is lost during multicast transmission from camera, the image frame rate may drop. In the case of H.264/MPEG-4, noise interference may occur and playback may fail. List of Protocols and Port Numbers used by Camera The camera uses the following protocols and port numbers. Ensure that these ports are allowed through the firewall when a firewall is to be installed. Protocol/Port number Source TCP/80 TCP/554 TCP/10020 TCP/10021 TCP/10023 TCP/32040 TCP/49298 Destination TCP/20, 21 TCP/25 TCP/110 TCP/User-defined number UDP/123 UDP/User-defined number Purpose of use JPEG/H.264/MPEG-4 acquisition, Web Settings page, API, audio acquisition RTSP (Reserved for adjustment) Alarm distribution Audio data reception FTP Mail POP (Mail delivery) Sending alarm SNTP Sending alarm 6
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