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User Manual
36
3.5 Troubleshooting
The following table describes solutions to the common problems.
You can also use the auto installation CD-ROM to solve certain connection problems.
If the solutions provided in this document cannot solve the problems you meet, contact
the customer service center of Vodafone.
Phenomenon Possible Cause Solution
The power indicator is off.
The HG556a is not connected
to the power supply.
Connect the HG556a to
the power supply.
The ADSL indicator is off.
The telephone line is not
properly connected.
Check the connection of
the telephone line.
The Ethernet cable is not
connected to the Ethernet
interface on the HG556a.
Connect the Ethernet
cable to the Ethernet
interface on the HG556a.
The LAN indicator is off.
The Ethernet cable is not
connected to the PC.
Connect the Ethernet
cable to the PC.
The Wi-Fi indicator is off.
The Wi-Fi radio channel of
the HG556a is off.
Check whether the Wi-Fi
button on the side panel
of the HG556a is pressed.
The TCP/IP protocol of the
network connection
(Ethernet or USB) is not
installed.
Install the Ethernet cable
or USB data card.
The browser has set up a
proxy server.
Access the option of the
Internet Explorer and
disable the proxy server.
The SSID or encryption
mode
(WPA/WEP/non-encryption)
of the HG556a is modified or
the configuration of the Wi-Fi
device is incorrect.
Check whether the SSID
or encryption mode of the
HG556a is correct.
The Wi-Fi device is out of the
radio coverage of the
HG556a.
Put the Wi-Fi device
within the radio coverage
of the HG556a.
Unable to access the
Internet.
The Wi-Fi device is not
authorized.
Use the 802.11b or
802.11g authorized
device and check
whether the installation
and configuration are
correct.
The HSPA indicator is off.
The HSPA module is not
correctly connected.
Reconnect the HSPA
module.
The HSPA indicator
blinking quickly.
The HG556a fails the HSPA
self-test.
Check whether the input
PIN is correct or check
whether the SIM card is
inserted correctly or
restart the HG556a.
36


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