User`s manual

VPort 2140 User’s Manual Troubleshouting
7-3
Q: What if I forget my password?
A: Every access to Video Server needs authentication. If you are not a permitted user, you may
view the images or control the camera as long as the demo account is opened. The demo
account user may use username as “demo” without any password to access limited features. If
you are one of the managed users, you must ask the administrators for the password in the first
time. If you are the administrator, there is no way to recover the root password. The only way to
regain access to Video Server is to restore the factory settings and reinstall it.
Q: Why can’t I watch video from Video Server after it is authenticated?
A: There are many possible scenarios regarding this problem,
1. If you have just installed Video Server and are unable to watch the video, check if the video
input is enabled and check the video modulation on the Configuration page.
2. If Video Server is installed correctly and you are accessing Video Server for the first time
using Internet Explorer, adjust the security level of Internet Explorer to allow installation of
the plug-in.
3. If the problem still exists after making the adjustment, the current number of users may be
greater than what the system allows.
4. If you are using a demo account, the administrator may hide the video from public view.
Q: How can I use a name instead of the IP address to connect Video Server?
A: To allow users to connect to Video Server through an easily memorized name, administrators
must first configure the network’s domain name server. Here is an example: the administrator
installs the Video Server with a reserved IP address and assigns it a name on the domain name
service, then users can connect to Video Server by typing a name instead of an IP address. If
there is DHCP service on the network, the IP address must be excluded on the DHCP service to
prevent an IP conflict.
Q: What is the plug-in for?
A: The plug-in provided by Video Server is used to display motion pictures on versions of Internet
Explorer that do not support server push technology. If your system does not allow installation
of any plug-in software, the security level of the web browser may need to be lowered. It is
recommended that you consult the network supervisor in your office regarding adjusting the
security level.
Q: Why is the timestamp different from the system time of my PC or notebook?
A: The timestamp is based on the system time of Video Server. It is maintained by an internal
real-time clock, and automatically synchronizes with the time server if Video Server is
connected to the Internet and the function is enabled. Differences of several hours may result
from the time zone setting.
Q: Why does the image not refresh regularly?
A: In a modem environment, it is because the bandwidth of PPP connections is much lower than
for Ethernet. If the difference of the timestamp is not stable, use the modem property on the
control panel to adjust the UART FIFO to a lower level for both receiving and transmitting. In
an Ethernet environment, it may be due to the time taken for storing snapshots into memory
when events occur.