ZyXEL IPC4605N User Guide - Page 62
network, you can use either the Network Bandwidth testing tool in the network
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Symptom Possible Cause/Solution Network bandwidth is insufficient. Without sufficient bandwidth, video quality will deteriorate and image errors like pixilation or frame-drop may occur. When you view your camera remotely from the Internet, your camera needs sufficient upload bandwidth to transmit video stream and you need sufficient download bandwidth to download video stream at the remote location. Part of the image becomes pixilated/Image artifacts appear To gain satisfactory video quality, ensure there is sufficient upload bandwidth available to your network camera by taking the following actions: 1. Contact your Internet Service Provider (ISP) to confirm the upload/download speed limit of your service. If the bit rate of the video stream is set at 512Kbps or higher but your Internet service only provides a max. of 512Kbps for upload bandwidth, then try to lower the bit rate setting in [Setup] > [Video]. 2. Run a network speed diagnostics on WebVUer to determine the bandwidth level of the currently connected network. To do so, log in to your camera using WebVUer and go to [Setup] > [Network] > [Network Bandwidth]. When the speed diagnostics is done, the WebVUer will advise you of the appropriate setting. Consider the following actions to ensure sufficient download bandwidth at your remote viewing location: Gray images are seen repeatedly 1. Contact your Internet Service Provider (ISP) to confirm the upload/download speed limit of your service. If the bit rate of the video stream is set at 3Mbps or higher but your Internet service only provides a max. of 2Mbps download bandwidth, then try to lower the bit rate setting in [Setup] > [Video]. 2. Upgrade to a Gigabit network switch. Regular 10/100 Mbps network switches cannot handle multiple megapixel streams. 3. While you are viewing the network camera remotely, shutting down any other applications that are also consuming network bandwidth in the background. Network quality is insufficient. Seeing lots of gray images in live view mode indicates that many data packets which carry video data are dropped during the transmission. This might be caused by network congestion, wireless congestion, or the limited upload/download bandwidth of your network. To measure the upload/download capability of your network, you can use either the "Network Bandwidth" testing tool in the network settings page, or visit speedtest.net (http://speedtest.net/). When using wired connection: Test your bandwidth to determine whether this problem is the result of poor network quality. Alternatively, try connecting your camera to your viewing computer directly to see if there are any faulty devices on your network. Ghost image is seen When using wireless connection: Besides the possible network bandwidth issue, your wireless signal strength could also come into play. Low wireless signal strength can lead to the same problem. You can check your wireless signal strength in the camera's network settings page. The wireless signal level seen in the network settings is measured in dBm. To gain the optimal wireless connection quality, a signal level greater than -60 dBm is recommended. When the signal level is too low, you may have to place your wireless Access Point in a different location, use a wireless repeater, or remove obstacles between the camera and the wireless AP. Network quality is too low. This is a common problem when the network's quality is low or the video setting is too high. Lower your camera's video bit rate and see if the problem continues.