ProScan NC691B, Operation Manual, Page: 46 / 47

42
5. If DDNS is successfully set in “Network Settings” of Network High Speed Dome, direct visit to the Network High Speed Dome can
be realized via entering http://test.mvddns.net:85 into IE browser.
Frequently asked questions
1.No video image displayed in IE browser.
Possible reason
: ActiveX not installed
Solution : ActiveX must be installed when visiting Network High Speed Dome for the first time via Internet Explore.
How to install : Visit Network High Speed Dome, click download ActiveX , file download dialog will pop up, select Run or Save to
download. After download finishes, installation interface will pop up, click install , the installation of ActiveX will start automatically,
“finish” dialog box will pop up to remind the completion of installation process.
2.Fail to visit Network High Speed Dome via IE after upgrade.
Solution : Delete the caching of Browser:
Open IE

click Tool

select “Internet Options”

click delete files button in “Internet temporary files”

select “delete all offline
contents”

click OK and re-log in Network High Speed Dome.
3.The images do not flow.
Possible reason 1 : The frame rate of Network High Speed Dome is too low.
Solution : Increase the video frame rate
Possible reason 2 : Too many users are viewing the images.
Solution
: Block some clients or reduce the video frame rate.
Possible reason 3 : The bandwidth is low.
Solution : Reduce video frame rate or video compression bit rate.
4.Fail to visit Network High Speed Dome via IE browser.
Possible Reason 1 : Network is disconnected.
Solution : Connect your PC to network, checking whether it works properly or not. Check whether there is cable failure or network
failure caused by PC virus, until PCs can be connected with the command of Ping.
Possible reason 2 : IP Address has been occupied by other devices
Solution : Stop the connection between Network High Speed Dome and Network, hook up Network High Speed Dome to PC
separately, reset IP address according to the proper operations recommended.
Possible reason 3 : IP addresses are in different subnets.
Solution : Check IP address, subnet masking address of the DVS and the settings of Gateway.
Possible reason 4 : Physical address of network conflict with Network High Speed Dome