Operating Instructions[For assistance, please call: 1-800-272-7033] 35• 640 x 480 pixels image cannot be displayed on the Multi-Camera page.• When viewing video (Motion JPEG), we recommend using an Ethernetswitching hub instead of the repeater hub to prevent degradation in videodisplay.• Due to the network congestion or the number of accesses, the refreshinterval may slow down.• When the refresh interval is slow, restrict the bandwidth on the Networkpage (see page 47 and page 52). The refresh interval may be improved.• To reduce the data traffic, the video can be automatically changed torefreshing still images on the General User page (see page 81).• When viewing 4 cameras on the Multi-Camera page, you may need 3 to4 Mbps bandwidth. If the bandwidth is not enough, the refresh intervalmay slow down.When the image is not displayed on the Multi-Camera page• Confirm that the Internet IP address is specified for each camera and that eachcamera is connected to the Internet. For Internet access, local IP addresses(192.168.xxx.xxx) cannot be used.• Confirm the settings on the Multi-Camera Setup page (see page 87).• Confirm that the web browser is not accessing the proxy server (see page146).When setting [Do not permit access from guest users] on theSecurity: Administrator page• An authentication window is displayed in camera access. Enter theadministrator's or the general user's user name and password.• When you view the images on the Multi-Camera page, all authenticationwindows of the configured cameras are displayed. Enter the administrator's orthe general user's user name and password registered for each camera.