Troubleshooting (continued) – JVC VN-V25U User Manual
Page 88
88
Others
Symptom
Causes and Countermeasures
Reference
Page
Multicast images cannot be
played back
● Start multicast transmission manually from the
[Streaming] page of VN-V25U.
● In the case of multicast reception at the built-in
viewer, check that the multicast address and port
number of the built-in viewer settings coincide
with those on the [Streaming] page of VN-V25U.
Make use of a network that supports IGMPv2 for
multicast transmission.
● Multicast may be blocked by the WindowsXP
firewall. When this occurs, perform the following
to allow it to pass through.
Double-click [Windows Firewall] under [Start]
-
[Control Panel], click the [Add Port…] button
under the Exception tab, and register the port
number to be allowed through the firewall in the
Port Number field. Enter an arbitrary character
string in the name field.
The frame rate of the
displayed image is low
● Check the built-in viewer settings when a built-in
viewer is in use.
● Frame rate will be constrained when the network
bandwidth is narrow.
A white zone appears in the
built-in viewer
● For some computers, a part of the Internet
Explorer graphics may not appear and is left
white when the following setting is performed on
the Internet Explorer.
If [Right-click on the Desktop screen]
-
[Properties]
-[Settings]-[Advanced]-
[Advanced]
-[DPI setting] is set to ALarge sizeB
or
ACustom sizeB, select ANormal sizeB to
resume normal drawing.
—
Unable to receive alarm
notification using the
computer via TCP/UDP
● Data may be blocked by the WindowsXP firewall.
When this occurs, perform the following to allow
it to pass through.
Double-click [Windows Firewall] under [Start]
-
[Control Panel], click the [Add Port…] button
under the Exception tab, and register the port
number to be allowed through the firewall in the
Port Number field. Enter an arbitrary character
string in the name field.
—
Images are not distributed to
the network
● Check whether the [MONITOR OUT] switch at
the side of VN-V25U is set to
ANTSCB or APALB.
If either of the above is selected, change the
[MONITOR OUT] switch setting to
AOFFB. After
changing the switch settings, press the [RESET]
button to reboot.
VN-V25U_EN.book Page 88 Friday, November 2, 2007 11:26 PM