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Chapter 41 Troubleshooting
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281
41.3
Internet Access
I cannot access the Internet.
1
Check the hardware connections, and make sure the LEDs are behaving as expected. See the
Quick Start Guide
and
Section 1.5 on page 20
.
2
Make sure you entered your ISP account information correctly in the
Network Setting >
Broadband
screen. These fields are case-sensitive, so make sure [Caps Lock] is not on.
3
If you are trying to access the Internet wirelessly, make sure that you enabled the wireless LAN in
the Device and your wireless client and that the wireless settings in the wireless client are the same
as the settings in the Device.
4
Disconnect all the cables from your device and reconnect them.
5
If the problem continues, contact your ISP.
I cannot access the Internet through a DSL connection.
1
Make sure you have the
DSL WAN
port connected to a telephone jack (or the DSL or modem jack
on a splitter if you have one).
2
Make sure you configured a proper DSL WAN interface (
Network Setting > Broadband
screen)
with the Internet account information provided by your ISP and that it is enabled.
3
Check that the LAN interface you are connected to is in the same interface group as the DSL
connection (
Network Setting > Interface Group
).
4
If you set up a WAN connection using bridging service, make sure you turn off the DHCP feature in
the
LAN
screen to have the clients get WAN IP addresses directly from your ISP’s DHCP server.
I cannot connect to the Internet using a second DSL connection.
ADSL and VDSL connections cannot work at the same time. You can only use one type of DSL
connection, either ADSL or VDSL connection at one time.
I cannot connect to the Internet using an Ethernet connection.
1
The DSL connection has priority. If the DSL connection is up, then the Ethernet connection will be
down.
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2
Make sure you have the Ethernet WAN port connected to a MODEM or Router.
3
Make sure you converted LAN port number four as WAN. Click
Enable
in
Network Setting
>
Broadband
>
Ethernet WAN
screen.
4
Make sure you configured a proper EthernetWAN interface (
Network Setting > Broadband
screen) with the Internet account information provided by your ISP and that it is enabled.
5
Check that the WAN interface you are connected to is in the same interface group as the Ethernet
connection (
Network Setting > Interface Group
).
6
If you set up a WAN connection using bridging service, make sure you turn off the DHCP feature in
the
LAN
screen to have the clients get WAN IP addresses directly from your ISP’s DHCP server.
I cannot connect to the Internet using a 3G connection.
1
The DSL and Ethernet connections have priority in that order. If the DSL or Ethernet connection is
up, then the 3G connection will be down.
2
Make sure you have connected a compatible 3G dongle to the USB port.
3
Make sure you have configured
Network Setting > Broadband > 3G Backup
correctly.
Check that the Device is within range of a 3G base station.
I cannot access the Device anymore. I
had access to the
Device, but my connection is not available anymore.
1
Your session with the Device may have expired. Try logging into the Device again.
2
Check the hardware connections, and make sure the LEDs are behaving as expected. See the
Quick Start Guide
and
Section 1.5 on page 20
.
3
Turn the Device off and on.
4
If the problem continues, contact your vendor.
41.4
Wireless Internet Access
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.
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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.
What is a Server Set ID (SSID)?
An SSID is a name that uniquely identifies a wireless network. The AP and all the clients within a
wireless network must use the same SSID.
41.5
USB Device Connection
The Device fails to detect my USB device.
1
Disconnect the USB device.
2
Reboot the Device.
3
If you are connecting a USB hard drive that comes with an external power supply, make sure it is
connected to an appropriate power source that is on.
4
Re-connect your USB device to the Device.
41.6
UPnP
When using UPnP and the Device reboots, my computer cannot detect UPnP and refresh
My
Network Places > Local Network
.
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1
Disconnect the Ethernet cable from the Device’s LAN port or from your computer.
2
Re-connect the Ethernet cable.
The
Local Area Connection
icon for UPnP disappears in the screen.
Restart your computer.
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P
ART
III
Appendices
Appendices contain general information. Some information may not apply to your device.

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