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Check the settings for QoS. If it is disabled, you might consider activating it.
23.5
Resetting the NBG5715 to Its Factory Defaults
If you reset the NBG5715, you lose all of the changes you have made. The NBG5715 re-loads its
default settings, and the password resets to
1234
. You have to make all of your changes again.
You will lose all of your changes when you push the
RESET
button.
To reset the NBG5715:
1
Make sure the power LED is on.
2
Press the
RESET
button for longer than 1 second to restart/reboot the NBG5715.
3
Press the
RESET
button for longer than five seconds to set the NBG5715 back to its factory-default
configurations.
If the NBG5715 restarts automatically, wait for the NBG5715 to finish restarting, and log in to the
Web Configurator. The password is “1234”.
If the NBG5715 does not restart automatically,
di
sconnect and reconnect the NBG5715’s power.
Then, follow the directions above again.
23.6
Wireless Router Troubleshooting
I cannot access the NBG5715 or ping any computer from the WLAN.
1
Make sure the wireless LAN is enabled on the NBG5715. Check if the
WLAN
button is at the
ON
position. Or you can enable the wireless LAN in the
Network > Wireless LAN 2.4G/5G >
General
screen.
2
Make sure the wireless adapter on the wireless station is working properly.
3
Make sure the wireless adapter installed on your computer is IEEE 802.11 compatible and supports
the same wireless standard as the NBG5715.
4
Make sure your computer (with a wireless adapter installed) is within the transmission range of the
NBG5715.
5
Check that both the NBG5715 and your wireless station are using the same wireless and wireless
security settings.
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6
Make sure traffic between the WLAN and the LAN is not blocked by the firewall on the NBG5715.
7
Make sure you allow the NBG5715 to be remotely accessed through the WLAN interface. Check
your remote management settings.
See the chapter on
Wireless LAN
in the User’s Guide for more information.
I can access the Internet, but I cannot open my network folders.
If you cannot access a network folder, make sure your account has access rights to the folder you
are trying to open.
What factors may cause intermittent or unstabled wireless connection? How can I solve this
problem?
The following factors may cause interference:
Obstacles: walls, ceilings, furniture, and so on.
Building Materials: metal doors, aluminum studs.
Electrical devices: microwaves, monitors, electric motors, cordless phones, and other wireless
devices.
To optimize the speed and quality of your wireless connection, you can:
Move your wireless device closer to the AP if the signal strength is low.
Reduce wireless interference that may be caused by other wireless networks or surrounding
wireless electronics such as cordless phones.
Place the AP where there are minimum obstacles (such as walls and ceilings) between the AP and
the wireless client.
Reduce the number of wireless clients connecting to the same AP simultaneously, or add
additional APs if necessary.
Try closing some programs that use the Internet, especially peer-to-peer applications. If the
wireless client is sending or receiving a lot of information, it may have too many programs open
that use the Internet.
Position the antennas for best reception. If the AP is placed on a table or floor, point the antennas
upwards. If the AP is placed at a high position, point the antennas downwards. Try pointing the
antennas in different directions and check which provides the strongest signal to the wireless
clients.
23.7
USB Device Problems
I cannot access or see a USB device that is connected to the NBG5715.
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1
Be sure to install the ZyXEL NetUSB Share Center Utility (for NetUSB functionality) first from the
included disc, or download the latest version from the zyxel.com website.
2
Disconnect the problematic USB device, then reconnect it to the NBG5715.
3
Ensure that the USB device in question has power.
4
Check your cable connections.
5
Restart the NBG5715 by disconnecting the power and then reconnecting it.
6
If the USB device requires a special driver, install the driver from the installation disc that came
with the device. After driver installation, reconnect the USB device to the NBG5715 and try to
connect to it again with your computer.
If the problem persists, contact your vendor.
What kind of USB devices do the NBG5715 support?
1
It is strongly recommended to use version 2.0 or lower USB storage devices (such as memory
sticks, USB hard drives) and/or USB devices (such as USB printers). Other USB products are not
guaranteed to function properly with the NBG5715.
23.8
ZyXEL NetUSB Share Center Utility Problems
I cannot install the ZyXEL NetUSB Share Center Utility.
1
Make sure that the set up program is one required for your operating system.
2
Install the latest patches and updates for your operating system.
3
Check the zyxel.com’s Download Library site and look for a newer version of the utility software
under the device’s model name.
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A
PPENDIX
A
Pop-up Windows, JavaScript and Java
Permissions
In order to use the web configurator you need to allow:
Web browser pop-up windows from your device.
JavaScript (enabled by default).
Java permissions (enabled by default).
Note: The screens used below belong to Internet Explorer version 6, 7 and 8. Screens for
other Internet Explorer versions may vary.
Internet Explorer Pop-up Blockers
You may have to disable pop-up blocking to log into your device.
Either disable pop-up blocking (enabled by default in Windows XP SP (Service Pack) 2) or allow
pop-up blocking and create an exception for your device’s IP address.
Disable Pop-up Blockers
1
In Internet Explorer, select
Tools
,
Pop-up Blocker
and then select
Turn Off Pop-up Blocker
.
Figure 110
Pop-up Blocker
You can also check if pop-up blocking is disabled in the
Pop-up Blocker
section in the
Privacy
tab.
1
In Internet Explorer, select
Tools
,
Internet Options
,
Privacy
.
2
Clear the
Block pop-ups
check box in the
Pop-up Blocker
section of the screen. This disables any
web pop-up blockers you may have enabled.

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