JVC VN-C20 - Manual (Page 72)

72
Others (continued)
Symptom Causes and Countermeasures
Reference
Page
Multicast images cannot be
played back ● Start multicast transmission manually from the
[Streaming] page of VN-C20.
● 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-C20.
Make use of a network that supports IGMP 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 on [Windows Firewall] in [Start]-
[Control Panel], click the [Add Port...] button
under the Exception tab, followed by
registering the port number in the port
number field for which you want it to pass
through. Enter an arbitrary character string in
the name field.
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The frame rate of the
displayed image is low ● Check the settings on the [Encoding] page of the
VN-C20 unit.
● Check the built-in viewer settings as well when a
built-in viewer is in use.
● Frame rate will be constrained when the network
bandwidth is narrow.
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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.
● Right-click on the Desktop screen. If −
[Properties]
−[Settings]−[Advanced]−
[Advanced] −[DPI setting] is set to ALarge
size B or ACustom sizeB, select ANormal sizeB
to resume normal drawing.
−
Unable to receive alarm
notification at the computer
via TCP/UDP ● Data may be blocked by WindowsXP
firewall.When this occurs, perform the following
to allow it to pass through.
● Double-click on [Windows Firewall] in [Start]-
[Control Panel], click the [Add Port...] button
under the Exception tab, followed by
registering the port number in the port
number field for which you want it to pass
through.Enter an arbitrary character string in
the name field.
VN-C20_EN.book Page 72 Tuesday, January 31, 2006 1:51 PM