Others

Troubleshooting (continued)

Symptom

Causes and Countermeasures

Reference

Page

 

 

 

 

 

Multicast images cannot be

● Start multicast transmission manually from the

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played back

[Streaming] page of VN-V25U/26U.

A Page 84

 

● In the case of multicast reception at the built-in

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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/

 

 

26U.

 

 

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

● Check the built-in viewer settings when a built-in

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displayed image is low

viewer is in use.

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● Frame rate will be constrained when the network

 

 

bandwidth is narrow.

 

 

 

 

A white zone appears in the

● For some computers, a part of the Internet

—

built-in viewer

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

● Data may be blocked by the WindowsXP

—

notification using the

firewall. When this occurs, perform the following

 

computer via TCP/UDP

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

● Check whether the [MONITOR OUT] switch at

A Page 11

the network

the side of VN-V25U/26Uis 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.

 

 

 

 

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