JVC VN-V225U series User Manual

83

Multicast images cannot be 
played back

● Start multicast transmission manually from the 

[Streaming] page of the camera.

● 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 the 
camera.
Make use of a network that supports IGMPv2 for 
multicast transmission.

● Multicast may be blocked by the Windows XP 

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.

● When the image distribution setting is set to the 

Aclient numberB mode and there is an increase 

in distribution request, images will be distributed 
at a frame rate lower than the specified frame 
rate.

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] selector 

switch on this camera is set to 

ANTSCB or 

APALB, ANB or APB. If either of the above is 

selected, change the [MONITOR OUT] selector 
switch setting to 

AOFFB. After changing the 

switch settings, press the [RESET] button to 
reboot.

INSTRUCTIONS 

(Installation)