3Com HomeConnect 3CP4130 User manual

Bridging Mode
Getting Started
Using your modem
Advanced
Operations
General Information
Troubleshooting
FAQs
Congratulations!
You are installed in Bridging Mode. Your connection is "always on".
You have successfully installed your 3Com HomeConnect ADSL Modem Dual Link. The
Dual Link provides a flexible mechanism to link multiple computers to each other and to
the Internet.
Your modem has the ability to support several ADSL service models. Your modem has
been installed to support the Bridging mode. In the Bridging mode your connection to
the Internet is always on. After modem installation, you configure your PCs as directed
by your Internet Service Provider. This typically means that you will configure the
TCP/IP protocol parameters on each local PC according to specific instructions from your
service provider.
To find out more about configuring additional PCs, click here.
The modem installation procedure you have completed installed a program group on your
hard drive. This program group provides shortcuts to:
Access the modem for diagnostics, monitoring your connection and upgrading your
modem software. For the most part, you should not have to directly access your
modem.
1.
View this online guide.2.
Install the Instant Update package which allows you to automatically obtain
software updates for your modem over the Internet.
3.
Uninstall the modem program group from your hard drive.4.

To access the modem group on your desktop, click:
Start->Programs->Dual Link Modem

Bridging Mode
Getting Started
Using your modem
Advanced
Operations
General Information
Troubleshooting
FAQs
Using your Dual Link Modem
The Dual Link modem is accessed via your browser by clicking:
Start->Programs->Dual Link Modem->Modem Settings
Your browser should automatically connect to the modem and display the Dual Link
Manager screen.
This screen contains a summary of your modem's configuration and an indication of
whether the ADSL line is operational. Besides the summary, the Dual Link Manager
provides two selections: System and Services. System settings allow you to monitor the
modem and update its software. Service settings allow you to monitor your connection to
the Internet.

Bridging Mode
Getting Started
Using your modem
Advanced Operations
General Information
Troubleshooting
FAQs
Advanced Procedures
From your Start button, proceed as follows:
Start->Programs->3Com Dual Link Modem->Advanced
and select one of the options given:
Install Instant Update●
Serial Download●
Uninstall Modem Utilities●

Bridging Mode
Getting Started
Using your modem
Advanced
Operations
General Information
Troubleshooting
FAQs
General Information
The information provided in these pages covers points of interest and information that
you don't need to know to operate your modem under normal circumstances but that
might be of use or interest to you:
Specifications●
Safety Information●
Technical Support●
Glossary of Terms●
Manufacturer's Declaration of Conformity●
3Com Corporation Limited Warranty●
Copyright Information●

Bridged
Mode
Home Troubleshooting
Here you will find troubleshooting tools and information for your 3Com HomeConnect ADSL
Modem Dual Link.
LED Status Indicator Diagnostics❍
Troubleshooting Tools❍
Troubleshooting Tables
Power Problems■
LAN Connection Problems■
USB Connection Problems■
Control Center Connection Problems■
Dual Link Manager (Web Browser) Connection Problems■
ADSL Connection Problems■
Slow Network response■
❍
LED Status Indicator Diagnostics
LED IS When
Alert Off The modem is operating properly
Flashing Orange During boot, the modem is checking for the download of
new software. This lasts for about 4 seconds.
Flashing Green slowly While the modem is initializing. This lasts for 30 to 40
seconds after booting the modem.
Flashing Green rapidly The reset button is being held in and the modem has just
been powered on. This lets you know that the modem has
recognized the reset request. It lasts for about 4 seconds.
Orange An unexpected error has occurred, but it does not affect
the operation of the modem.
Red A non-recoverable error has occurred. If this happens, the
modem will automatically reboot.
Power Green Power is on.
LAN Status Off No Ethernet signal has been detected.
Green A PC or hub is properly connected to the Ethernet port.

Flashing Green A proper connection exists and data is present on the
Ethernet port.
USB Status Off No USB signal has been detected.
Flashing Orange
A PC is properly connected to the USB port but the
modem has not "enumerated." (When you plug in the
modem, the PC senses voltage differences in the USB
network and proceeds to query (enumerate) the modem
for type, vendor, functionality and bandwidth required.)
Orange The modem has enumerated with the PC. This means that
the operating system running on the PC has recognized
the modem.
Green The modem's software has established communications
with the 3Com USB driver software running on the PC.
Flashing Green The modem is working and data is present on the USB
port.
ADSL Status Off No ADSL signal has been detected
Flashing Orange The modem is attempting to synchronize with the DSL
service provider's equipment.
Green The link has been established between your modem and
the DSL service provider's equipment.
Flashing Green The link is up and there is data on the ADSL port.
Troubleshooting Tools
The 3Com HomeConnect ADSL Modem Dual Link has a number of features which can be used to
help troubleshoot problems.
The Dual Link Manager has several important diagnostic tools:
On the Dual Link Manager Summary Page, you can see your ADSL line status (whether the line is up
or down.)
In the Dual Link Manager Systems Page area, Diagnostics includes a number of statistics that your
service provider would find useful if they were trying to fix an ADSL line problem.
In the Dual Link Manager, you also have the ability to reset the ADSL port. This renegotiates the
ADSL-level connection.
Troubleshooting Tables
The troubleshooting tables are organized so that potential hardware and line problems are presented
first, followed by higher level configuration problems.
How to Use these Tables
If you are having any type of connection problem (e.g., the workstations on the local LAN cannot
connect to the remote network) you should work your way down the tables to eliminate any low-level

problem before working through the WAN connection problems.
Power Problems
Symptoms Possible Cause Corrective Action
The LAN LED is Off. The LAN cable is not connected Check that one end of the LAN cable
is fully plugged into the LAN port on
your modem and the other end is fully
plugged into the local LAN
connection.
The MDI/X switch on the back of
the modem is set to connect to a
single PC but the cable is
connected to a hub (or vice
versa).
Press the switch in to connect to a hub
and out to connect to a PC.
LAN Connection Problems
Symptoms Possible Cause Corrective Action
The LAN LED is Off. The LAN cable is not connected Check that one end of the LAN cable
is fully plugged into the LAN port on
your modem and the other end is fully
plugged into the local LAN
connection.
The MDI/X switch on the back of
the modem is set to connect to a
single PC but the cable is
connected to a hub (or vice
versa).
Press the switch in to connect to a hub
and out to connect to a PC.
The LAN cable has been
damaged. Replace the cable with another LAN cable.
USB Connection Problems
Symptoms Possible Cause Corrective Action
My Windows-based PC did not
automatically detect the modem
when I plugged in the USB cable
for the first time.
The modem is not
powered on. Plug in the modem and allow it enough time to complete the boot
process. (Status LED goes off.)
The USB LED on the modem is
Off. There's a USB connection problem. Check that one end of the USB cable is fully plugged into the
USB port on the modem and the
other end is fully plugged into
the PC's USB port.
The USB cable has been
damaged. Replace the USB cable.

Although your PC has a
USB port, the operating
system that is running
on your system does not
support its use.
If you are running Microsoft
Windows 3.1, Windows 95, or
Windows NT, you will need to
upgrade your operating system to
Windows 98 or Windows 2000.
The USB port on your
PC is not enabled. Verify that the USB port is enabled by running the PC's
Setup program (typically the F1
or Delete key at boot). Refer to
your computer manufacturer's
documentation if you are having
trouble running the Setup
program or cannot find the USB
Configuration Settings section.
I successfully installed the 3Com
USB driver, but after rebooting, I
cannot communicate over the USB.
The USB LED on the Dual Link
Unit is solid orange.
The 3Com USB driver
did not install correctly
or the 3Com USB driver
is not running.
De-install then re-install the
3Com USB driver. (See the
driver installation procedure in
Your Installation Guide.)
Control Center Connection Problems
Symptoms Possible Cause Corrective Actions
From the Dual Link Control
Center, when I attempt to
connect to my service, I get
a connection timeout.
The modem is not powered
on. Plug in the modem and allow it sufficient time (about 1 minute) to
complete the boot process.
There's an Ethernet or USB
connection problem. See previous sections in this troubleshooting guide concerning
Ethernet or USB connection problems.
Dual Link Manager Connection Problems
Symptoms Possible Cause Corrective Actions
I can't bring up the Dual
Link Manager from my
browser
The modem is not powered
on. Power on the modem and allow it sufficient time (about 1 minute) to
complete the boot process.
There's an Ethernet or USB
connection problem. See previous sections in this troubleshooting guide concerning
Ethernet or USB connection problems.

I did not first establish a
connection to the modem
through the Dual Link
Control Center.
Before you can access the Web-based
management screens of the Dual Link
unit, you must first establish a
connection to the Dual Link unit.
Double click 3Com Dual Link Control
Center icon on your desktop. Then
click the Dual Link Manager icon to
launch a browser and bring up the Dual
Link Manager.
ADSL Connection Problems
Symptoms Possible Cause Corrective Action
ADSL LED is blinking
orange
The Dual Link Control
Manager Summary
confirms that the ADSL
status is "down".
The Dual Link Control
Manager> System>
Diagnostics shows that
there is a loss of signal
error.
The ADSL (modem) cable is not
connected. (This is the RJ11 cable
that plugs into your
ADSL-enabled jack.)
Check that one end of the ADSL
cable is fully plugged into your
DSL-enabled wall plug. Check
that the other end is fully plugged
into the ADSL port in the back of
your modem.
The ADSL cable has been
damaged. Replace the ADSL cable.
The ADSL cable wiring (inner
pair versus outer pair) is not set
correctly.
Make sure it is set as specified by
your service provider or use the
Auto Detect setting to allow the
modem to select the correct pair.
There is a problem at the other
end of the ADSL connection that
causes the ADSL negotiation to
fail.
Contact your service provider.
My ADSL link is not
stable (goes up and down
a lot).
The ADSL cable wiring (inner
pair versus outer pair) is not set
correctly.
Make sure it is set as specified by
your service provider or use the
Auto Detect setting to allow the
modem to select the correct pair.
The distance from the CO may be
at or near maximum, causing loss
of signal.
Check statistics in the Dual Link
Manager Systems> Diagnostics
page. If you see a low upstream
signal-to-noise ratio or a large
number of errors, you may have a
line quality issue. Contact your
service provider.
Wiring inside the house may be
causing interference from analog
phones or modems.
Make sure any filter or splitter
which you received from your
service provider is installed
properly.
Slow Network Response
Symptoms Possible Cause Corrective Action