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Troubleshooting
Symptom Causes and Countermeasures
Reference
Page
IP address of VN-V25U is
unknown
● DHCP is AEnableB in default settings. IP address
will be provided from DHCP server.
● If there is no DHCP server, VN-V25U will start
using default IP address, 192.168.0.2, and
default subnet mask, 255.255.255.0.
● Search tool in attached CD-ROM is available to
find VN-V25U from a PC in the same LAN.
A Page 28
The web page of VN-V25U
cannot be displayed
Check the Internet Explorer settings.
When a proxy server is in use, configure the proxy
server settings of the Internet Explorer accordingly.
A Page 29
The built-in viewer cannot be
installed
Check the Internet Explorer settings.
The built-in viewer consists of a software
component called ActiveX.
The ActiveX is usually installed when the built-in
viewer is used for the first time. However, installation
may be rejected depending on the Anti-virus
software settings. In this case, change the settings
of the Anti-virus software before installing the built-in
viewer.
A Page 74
Authentication by Verisign
appears during installation of
the built-in viewer
Verisign’s electronic signature is stored in the built-
in viewer.
For computers with a network environment that is
connected to the Internet, the authenticity of the
viewer can be verified via authentication by Verisign.
—
A warning message appears
upon starting up the built-in
viewer
The built-in viewer consists of a software
component called ActiveX.
The ActiveX is usually installed when the built-in
viewer is used for the first time. However, installation
may be rejected depending on the Anti-virus
software settings. In this case, change the settings
of the Anti-virus software before installing the built-in
viewer.
—
TCP images cannot be
played back
The maximum number of images that can be sent
by VN-V25U via TCP is 20, and up to 20 built-in
viewers can be connected to each VN-V25U unit.
Make use of multicast for monitoring when the
number of areas exceeds the above number.
VN-V25U allows multicast transmission of JPEG
and MPEG4 one stream at a time.
A Page 21
VN-V25U_EN.book Page 87 Friday, November 2, 2007 11:26 PM