Arcadyan Technology WG4005DARC OfficeConnect Wireless 11g Cable/DSL Router User Manual DUA0055 4AAA01rev01

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Date Submitted	2004-06-21 00:00:00
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Internet Settings
61
■
Use this PC’s MAC address - This field is automatically filled in with the
MAC address of the PC you are using to configure the Router. You
should use this address only if you were previously using this
computer to connect directly to your modem.
■
Enter a new MAC address manually - Use this option if you want to
specify a new MAC address. Enter the new MAC address.
5 Check all settings and click Apply.
PPP over Ethernet
Figure 43 PPPoE Setup Screen
To setup the Router for use with a PPP over Ethernet connection, use the
following procedure:
1 Select PPP over Ethernet in the IP Allocation Mode field. (Figure 43)
2 Enter your Primary DNS Address and Secondary DNS address.
Your ISP may provide you with primary and secondary DNS addresses. If
they have been provided, enter the addresses in the appropriate text
boxes. If not, leave 0.0.0.0 in the boxes.
3 Enter the Host Name (optional).
Some ISPs require a host name. If your ISP has this requirement, enter the
host name in the Host Name text box.
4 Enter your PPP over Ethernet user name in the PPPoE User Name text box.
5 Enter a password in the PPPoE Password text box.
62
CHAPTER 5: ROUTER CONFIGURATION
6 Enter your PPP over Ethernet service name in the PPPoE Service Name text
box. Not all ISPs require a PPPoE service name. Only enter a service name
if your ISP requires this.
7 Select an idle time from the Maximum Idle Time drop-down list.
This value will correspond to the amount of idle time (no Internet activity)
that will pass before the Router automatically ends your PPP over
Ethernet session.
Since the Router contains its own PPPoE client, you no longer need to run
PPPoE client software on your computer to access the Internet.
PPTP
Figure 44 PPTP Setup Screen
To setup the Router for use with a PPTP connection, use the following
procedure:
1 Select PPTP (used by some European providers) in the IP Allocation Mode
field. (Figure 44)
2 Enter your PPTP server address in the PPTP Server Address text box (this is
typically the address of your modem).
3 Enter your PPTP user name in the PPTP User Name text box.
4 Enter your password in the PPTP Password text box.
Firewall
63
5 Enter your Primary DNS Address and Secondary DNS address.
Your ISP may provide you with primary and secondary DNS addresses. If
they have been provided, enter the addresses in the appropriate text
boxes. If not, leave 0.0.0.0 in the boxes.
6 Select an idle time from the Maximum Idle Time drop-down list.
This value will correspond to the amount of idle time (no Internet activity)
that will pass before the Router automatically ends your PPTP session.
7 IP settings must be used when establishing a PPTP connection. Fill in the
Initial IP Address and the Initial Subnet Mask fields if your ISP has
provided you with these settings. Alternatively, if the PPTP server is
located in your DSL modem, click Suggest to select an IP address on the
same subnet as the PPTP server.
Firewall
Virtual Servers
On the main frame of the Firewall setup screen is a menu with five tabs:
Virtual Servers, Special Applications, PCs Privileges, URL Filter, and
Security.
Selecting the Firewall option on the main menu displays the Virtual
Servers setup screen. (Figure 45)
Virtual DMZ
Figure 45 Virtual Servers Screen
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CHAPTER 5: ROUTER CONFIGURATION
DMZ (De-Militarized Zone) Host is a computer without the protection of
the firewall. This feature allows a single computer to be exposed to
unrestricted 2-way communication from outside of your network. This
feature should be used only if the Virtual Server or Special Applications
options do not provide the level of access needed for certain applications.
To configure one of your computers as a DMZ host, enter the last digit(s)
of the IP address of the computer in the IP Address of DMZ Host text box,
and then click Apply.
Virtual Server
Activating and configuring a virtual server allows one or more of the
computers on your network to function as a public server. For example,
one of your computers could be configured as an FTP server, allowing
others outside of your office network to download files of your choosing.
Or, if you have created a Web site, you can configure one of your
computers as a Web server, so that others can view your Web site.
To configure a virtual server:
1 Click New on the right side of the screen to open the Virtual Server
Settings dialogue box. (Figure 46)
2 Enter the last digit(s) of the IP address of the computer in the Server IP
Address text box.
3 Select the Service from the pull-down list. (Figure 46)
Figure 46 Virtual Servers Settings Screen
Firewall
65
Or select Custom to specify a suitable name for the service and then enter
the port numbers required for that service. (Figure 47)
Figure 47 Custom Setup Screen
4 Click Add to save the settings.
The port numbers are specified using a comma-separated list, with
hyphens to denote port number ranges. So for example, entering 2, 3,
5-7 would cause ports 2, 3, 5, 6, and 7 to be activated.
Special Applications
Figure 48 Special Applications Screen
Select Special Applications tab to display Authorized Application setup
screen. (Figure 48)
Some software applications require special or multiple connections to the
Internet and these would normally be blocked by the firewall. For
example Internet Telephony or Video conferences require multiple
connections.
So that these special applications can work properly and are not blocked,
the firewall needs to be told about them. In each instance there will be a
66
CHAPTER 5: ROUTER CONFIGURATION
trigger port and incoming port(s), where traffic on the trigger port tells
the firewall to open the incoming ports.
Each defined Special Application only supports a single computer user,
and up to 10 Special Applications can be defined. Any incoming ports
opened by a Special Application trigger will be closed after five minutes
of inactivity.
To configure special applications:
1 Click New.
2 Select the applications from the pull-down list. (Figure 49)
Figure 49 Special Application Settings Screen
Or select Other to specify a suitable name for the special application and
then enter a value in the Trigger Port and Incoming Ports text boxes
(Figure 49). These values correspond to the outbound port numbers
issued by the application.
The port numbers are specified using a comma-separated list, with
hyphens to denote port number ranges. So for example, entering 2, 3,
5-7 would cause ports 2, 3, 5, 6, and 7 to be activated.
The Router will automatically allow FTP and NetMeeting sessions. You do
not need to configure these as Special Applications.
Firewall
67
Figure 50 Other Applications Setup Screen
3 Click Add to save your settings.
Only one computer on your network can use the special application at
any one time.
PC Privileges
Figure 51 PC Privileges Screen
Select PC Privileges to display the PC Privilege setup screen (Figure 51).
Access from the local network to the Internet can be controlled on a
computer-by-computer basis. In the default configuration the Router will
allow all connected computers unlimited access to the Internet.
PC Privileges allows you to assign different access rights for different
computers on your network.
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CHAPTER 5: ROUTER CONFIGURATION
To use access control for all computers:
1 Click PCs access authorized services only.
2 Select All PCs to setup the access rights for all computers connected to
the Router.
3 Select authorized services by clicking in the appropriate check box(es)
(Figure 52).
Figure 52 All PCs Setup Screen
In addition to the four authorized services listed, you can choose to allow
or block access to other services. You can either:
■
Allow all other services with exceptions, or
■
Block all other services with exceptions
4 To do this, select Allow or Block from the drop down menu and enter the
exceptions into the text box.
The port numbers are specified using a comma-separated list, with
hyphens to denote port number ranges. So for example, entering 2, 3,
5-7 would cause ports 2, 3, 5, 6, and 7 to be activated.
For example, to block access to all services except Web (80) and a service
that uses ports 2,3,5,6 and 7:
1. Tick the Web(80) check box.
2. Select ‘Block’ all other services.
3. Enter ‘2, 3, 5-7’ in the ‘except (specify ports) box. See Figure 53.
Firewall
69
Figure 53 PC Privileges Setup Screen Example
5 Click Modify to save the settings or Close to discard them.
To assign different access rights for different computers:
1 If not already selected, click PCs access authorized services only.
2 Click New to display the PC Privileges setting screen.
3 Enter the last digit(s) of the IP address of the computer in the PC’s IP
Address text box.
4 Select authorized services by clicking in the appropriate check box(es).
In addition to the four authorized services listed, you can choose to allow
or block access to other services. You can either:
■
Allow all other services with exceptions, or
■
Block all other services with exceptions
See step 4 of the previous section for more details.
5 Click Add to save the settings.
URL Filter
Select URL Filter to control your clients’ access to Web sites. The Router’s
URL Filter has three settings:
■
Disabled — Users can browse all Web sites. None will be filtered.
■
Deny List — Users can browse all Web sites apart from those sites
listed in the deny list and those whose URLs contain keywords listed in
the deny list. See “Deny List” on page 70.
■
Allow List — Users are unable to browse any Web sites except of
those listed in the allow list and those whose URLs contain keywords
listed in the allow list. See “Allow List” on page 71.
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CHAPTER 5: ROUTER CONFIGURATION
Deny List
To allow users access to all Web sites except for those you choose to
block, choose Deny List in the URL Filter Type drop-down box (Figure 54).
Figure 54 URL Filter Screen showing Deny List
To filter a specific site, enter the URL for that site. For example, to stop
your users from browsing a site called www.badsite.com, enter
www.badsite.com or badsite.com in one of the fields.
If badsite.com has multiple sub-domains, such as this.badsite.com and
that.badsite.com then you can either:
■
Block them individually by entering this.badsite.com in one field
and that.badsite.com in another.
or
■
Block them by entering the keyword badsite.com into one of the
fields. This will block all URLs containing the string badsite.com. As
well as blocking this.badsite.com and that.badsite.com,
the keyword badsite.com would block searches that mentioned
badsite.com in their domain name, for example
www.notabadsite.com.
To filter a generic keyword enter it into one of the fields. You should
exercise caution when choosing a keyword as many keywords are
Firewall
71
contained within other words. For example, filtering the word sex would
filter the following example URLs:
■
www.sussex.com
■
www.thisexample.com
You can filter up to 30 keywords and URLs.
Computers that should not be subject to URL filtering can be excluded by
ticking the Bypass URL Filter checkbox in the PC Privileges setup screen.
See “PC Privileges” on page 67.
Allow List
To stop users from accessing any Web sites that you have not specifically
allowed, choose Allow List in the URL Filter Type drop-down box
(Figure 55).
Figure 55 URL Filter Screen showing Allow List
To allow a specific site, enter the URL for that site. For example, to let
your users browse a site called www.goodsite.com, enter
www.goodsite.com or goodsite.com in one of the fields.
If goodsite.com has multiple sub-domains, such as
this.goodsite.com and that.goodsite.com then you can
either:
72
CHAPTER 5: ROUTER CONFIGURATION
■
Allow them individually by entering this.goodsite.com in one
field and that.goodsite.com in another.
or
■
Allow them by entering the keyword goodsite.com into one of the
fields. This will allow all URLs containing the string goodsite.com.
As well as allowing this.goodsite.com and
that.goodsite.com, the keyword goodsite.com would allow
sites that had the string goodsite.com in their URL, for example
xxxgoodsite.com.
To filter a generic keyword enter it into one of the fields. You should
exercise caution when choosing a keyword as sites that you may wish to
block may be allowed if you choose too general a keyword.
The Router filters all traffic from domains that have been blocked using
the URL filter. If need to access an external mail server, FTP server or other
named device outside your network, you must list it in one of the allow
fields.
You can filter up to 30 keywords and URLs.
Computers that should not be subject to URL filtering can be excluded by
ticking the Bypass URL Filter checkbox in the PC Privileges setup screen.
See “PC Privileges” on page 67.
Firewall
Security
73
Select Security to display the Security screen (Figure 56).
Figure 56 Security Screen
The Internet connects millions of computer users throughout the world.
The vast majority of the computer users on the Internet are friendly and
have no intention of breaking into, stealing from, or damaging your
network. However, there are hackers who may try to break into your
network.
Enable universal plug and play Universal plug and play allows
compatible software to read and change some the Router’s firewall
settings. This reduces the configuration required but lessens your control
of the Router’s firewall.
3Com recommends that you leave this feature disabled for maximum
security.
Allow PING from the Internet PING is a utility, which is used to
determine whether a device is active at the specified IP address. PING is
normally used to test the physical connection between two devices, to
ensure that everything is working correctly.
By default the Router has PING disabled in order to make the device more
difficult to find on the Internet and less prone to attack.
74
CHAPTER 5: ROUTER CONFIGURATION
This feature is enabled by clicking on the check box so that a tick can be
seen and then select Apply.
3Com recommends that you leave this disabled.
Enabling Remote Administration
It is possible to administer the Router remotely. This can be set to one of
four different levels using the following options:
1 Disable Remote Administration - This option is set as default.
2 Enable administration from a single Internet Host - Only the specified IP
address can manage the Router. Any other users will be rejected.
3 Enable administration from a whole subnet - This option allows a
number of users within a subnet to administer the Router.
4 Enable administration from any Internet Host - This options allows any
host to access the administration pages.
To remotely administer your Router, enter
http://xxx.xxx.xxx.xxx:8000 in the location bar of the browser
running on the remote computer, where xxx.xxx.xxx.xxx is the Internet IP
address of the Router. You may then login using the administration
password.
Your Internet IP address can be found at the bottom of the screen. See
Figure 56.
System Tools
System Tools
75
The main frame of the System Tools screen includes four administration
items: Restart, Time Zone, Configuration, and Upgrade (Figure 57).
Restart
Figure 57 Restart Screen
If your Router is not operating correctly, you can choose to restart the
Router by selecting Restart the Router, simulating the effect of power
cycling the unit. No configuration information will be lost but the log files
will be erased. This function may be of use if you are experiencing
problems and you wish to re-establish your Internet connection. Any
network users who are currently accessing the Internet will have their
access interrupted whilst the restart takes place, and they may need to
reboot their computers when the restart has completed and the Router is
operational again.
76
CHAPTER 5: ROUTER CONFIGURATION
Time Zone
Figure 58 Time Zone Screen
Choose the time zone that is closest to your actual location. The time
zone setting is used by the system clock when displaying the correct time
in the log files.
If you use Daylight saving tick the Enable Daylight savings box, and then
click Apply (Figure 58).
The Router reads the correct time from NTP servers on the Internet and
sets its system clock accordingly. The Daylight Savings option merely
advances the system clock by one hour. It does not cause the system
clock to be updated for daylight savings time automatically.
System Tools
Configuration
77
Figure 59 Configuration Screen
Select the Configuration tab to display the Configuration screen
(Figure 59).
Backup Configuration
Click BACKUP to save the current Router configuration. You will be
prompted to download and save a file to disk.
Restore Configuration Data
If you want to reinstate the configuration settings previously saved to a
file, press Browse to locate the backup file on your computer, and then
click RESTORE to copy the data into the Router's memory.
The password will remain unchanged.
Reset to Factory Default
If you want to reset the settings on your Router to those that were loaded
at the factory, click RESET. You will lose all your configuration changes.
The Router LAN IP address will revert to 192.168.1.1, and the DHCP
server on the LAN will be enabled. You may need to reconfigure and
restart your computer to re-establish communication with the Router.
78
CHAPTER 5: ROUTER CONFIGURATION
Upgrade
Figure 60 Upgrade Screen
The Upgrade facility allows you to install on the Router any new releases
of system software that 3Com may make available. To install new
software, you first need to download the software from the 3Com
support web site to a folder on your computer. Once you have done this,
select Browse to tell your web browser where this file is on your
computer, and then click Apply. The file will be copied to the Router, and
once this has completed, the Router will restart. Although the upgrade
process has been designed to preserve your configuration settings, it is
recommended that you make a backup of the configuration beforehand,
in case the upgrade process fails for any reason (for example, the
connection between the computer and the Router is lost while the new
software is being copied to the Router).
The upgrade procedure can take up to two minutes, and is complete
when the Alert LED has stopped flashing and is permanently off. Make
sure that you do not interrupt power to the Router during the upgrade
procedure; if you do, the software may be corrupted and the Router may
not start up properly afterwards. If the Alert LED comes on continuously
after a failed upgrade, refer to Chapter 6, “Troubleshooting”.
Status and Logs
Status
Selecting Status and Logs from the main menu displays the Status, Usage,
and Logs screens in your Web browser window.
The Status screen displays a tabular representation of your network and
Internet connection. (Figure 61)
Status and Logs
79
Figure 61 Status Screen
Usage
Usage displays an approximate count of the traffic since the Router was
last reset. (Figure 62)
The counts are approximate and should be used as a guide only. Contact
your ISP for accurate logging information.
80
CHAPTER 5: ROUTER CONFIGURATION
Figure 62 Usage Screen
Logs
Logs will allow you to view both the normal events, and security threats
logged by the Router.
Figure 63 Logs Screen
You may be asked to refer to the information on the Status and Logs
screens if you contact your supplier for technical support.
Support/Feedback
Selecting Support/Feedback from the main menu displays the Support
and Feedback screens.
Support/Feedback
Support
81
Figure 64 Support Screen
Selecting the Support option on the main menu displays the support links
screen, which contains a list of Internet links that provide information and
support concerning the Router (Figure 64).
Feedback
Figure 65 Feedback Screen
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CHAPTER 5: ROUTER CONFIGURATION
Selecting the Feedback option displays the Feedback screen and allows
you to provide feedback to 3Com on the operation of your Router
(Figure 65). This screen should not be used to obtain technical support.
6
Basic Connection
Checks
Browsing to the
Router
Configuration
Screens
TROUBLESHOOTING
■
Check that the Router is connected to your computers and to the
cable/DSL modem, and that all the equipment is powered on. Check
that the LAN Status and Cable/DSL Status LEDs on the Router are
illuminated, and that any corresponding LEDs on the cable/DSL
modem and the NIC are also illuminated.
■
Ensure that the computers have completed their start-up procedure
and are ready for use. Some network interfaces may not be correctly
initialized until the start-up procedure has completed.
■
If the link status LED does not illuminate for a port that is connected,
check that you do not have a faulty cable. Try a different cable.
If you have connected your Router and computers together but cannot
browse to the Router configuration screens, check the following:
■
Confirm that the physical connection between your computer and the
Router is OK, and that the LAN Status LEDs on the Router and NIC are
illuminated and indicating the same speed (10Mbps or 100Mbps).
Some NICs do not have status LEDs, in which case a diagnostic
program may be available that can give you this information.
■
Ensure that you have configured your computer as described in
Chapter 3, Setting Up Your Computers. Restart your computer while it
is connected to the Router to ensure that your computer receives an IP
address.
■
When entering the address of the Router into your web browser,
ensure that you use the full URL including the http:// prefix (e.g.
http://192.168.1.1).
■
Ensure that you do not have a Web proxy enabled on your computer.
Go to the Control Panel and click on Internet Options. Select the
84
CHAPTER 6: TROUBLESHOOTING
Connections tab and click on the LAN Settings button at the bottom.
Make sure that the Proxy Server option is unchecked.
Connecting to the
Internet
■
If you cannot browse to the Router, use the winipcfg utility in
Windows 95/98/ME to verify that your computer has received the
correct address information from the Router. From the Start menu,
choose Run and then enter winipcfg. Check that the computer has
an IP address of the form 192.168.1.xxx (where xxx is in the range
2-254), the subnet mask is 255.255.255.0, and the default Router is
192.168.1.1 (the address of the Router). If these are not correct, use
the Release and Renew functions to obtain a new IP address from the
Router. Under Windows 2000, use the ipconfig command-line utility
to perform the same functions.
■
If you still cannot browse to the Router, then use the Discovery
program on the accompanying CD-ROM as described in Appendix A.
If you can browse to the Router configuration screens but cannot access
sites on the Internet, check the following:
■
Confirm that the physical connection between the Router and the
cable/DSL modem is OK, and that the link status LEDs on both Router
and modem are illuminated.
■
Confirm that the connection between the modem and the cable/DSL
interface is OK.
■
Ensure that you have entered the correct information into the Router
configuration screens as required by your Internet Service Provider. Use
the “Internet Settings” screen to verify this.
■
For DSL users, check that the PPPoE or PPTP user name, password and
service name are correct, if these are required. Only enter a PPPoE
service name if your ISP requires one.
■
For cable users, check whether your ISP requires a fixed MAC
(Ethernet) address. If so, use the Clone MAC Address feature in the
Router to ensure that the correct MAC address is presented, as
described on page 60.
■
For cable users, check whether your ISP requires a fixed Host Name. If
so, enter the required Host Name in the Internet Settings screen.
■
Ensure that your computers are not configured to use a Web proxy.
On Windows computers, this can be found under Control Panel >
Internet Options > Connections.
Forgotten Password and Reset to Factory Defaults
Forgotten
Password and Reset
to Factory Defaults
85
If you can browse to the Router configuration screen but cannot log on
because you do not know or have forgotten the password, follow the
steps below to reset the Router to it’s factory default configuration.
CAUTION: All your configuration changes will be lost, and you will need
to run the configuration wizard again before you can re-establish your
Router connection to the Internet. Also, other computer users will lose
their network connections whilst this process is taking place, so choose a
time when this would be convenient.
1 Remove power from the Router.
2 Disconnect all your computers and the cable/DSL modem from the
Router.
3 Using a straight through Ethernet cable, connect the Ethernet Cable/DSL
port on the rear of the Router to any one of the LAN ports.
4 Re-apply power to the Router. The Alert LED will flash as the Router starts
up, and after approximately 30 seconds will start to flash more slowly
(typically 2 seconds on, 2 seconds off). Once the Alert LED has started to
flash slowly, remove power from the Router.
5 Remove the cable connecting the Cable/DSL port to the LAN port, and
reconnect one of your computers to one of the Router LAN ports.
6 Re-apply power to the Router, and when the start-up sequence has
completed, browse to:
http://192.168.1.1
and run the configuration wizard. You may need to restart your computer
before you attempt this.
7 When the configuration wizard has completed, you may reconnect your
network as it was before.
Wireless
Networking
■
Ensure that you have an 802.11b or 802.11g wireless adapter for
each wireless computer, and that it is correctly installed and
configured. Verify that each Wireless computer has either Windows
95 or higher or MAC OS 8.5 or higher.
■
Verify that your wireless computers are configured to work in
Infrastructure mode and not Ad Hoc mode. The Router contains an
Access Point that is designed to operate in Infrastructure mode. Ad
Hoc mode is not supported by the Router.
86
CHAPTER 6: TROUBLESHOOTING
■
If you have a wired and a wireless NIC in the same computer, ensure
that the wired NIC is disabled.
■
Check the status of the Router Wireless LED, it should be lit if wireless
is enabled and will flash when there is wireless activity. If not lit go to
“Wireless Settings” on page 47 and enable wireless networking.
■
Ensure that the TCP/IP settings for all devices are correct.
■
Ensure that the Wireless Clients are using the same SSID or Service
Area Name as the Router. The SSID is case-sensitive
■
Ensure that the encryption method and level that you use on your
clients are the same as those configured on the Router. The Router can
simultaneously support WPA and WEP encryption, but can only
support one configuration of each.
■
Ensure that you have the Wireless computer enabled in the list of
allowed MAC addresses if you are using Wireless Connection control
on the Router.
■
If you are having difficulty connecting or are operating at a low speed
try changing the antenna positions on the rear of the Router. For more
effective coverage you can try reorientating your antennae. Place one
antenna vertically and one horizontally to improve coverage.
Additionally consider moving the wireless computer closer to the
Router to confirm that the building structure or fittings are not
adversely affecting the connectivity. If this resolves the problem
consider relocating the Wireless computer or the Router, or trying a
different channel on the Router.
■
Sources of interference: The 2.4Ghz ISM band is used for 802.11b and
802.11g. This is generally a licence free band for low power
applications, and you may have other devices at your location that
operate in this frequency band. You should take care to ensure that
there are no devices like microwave ovens for example close to the
Router or wireless computers as this could affect receiver sensitivity
and reduce the performance of your network. If you are unsure try
relocating both the wireless computers and the Router to establish
whether this problem exists.
■
Most wireless computer Adapters will scan the channels for the
wireless Router. If a wireless computer has not located the Router then
try initiating a search manually if the client software supports this
feature or manually set the channel on your wireless computer to
correspond to the Router channel number. Please refer to your
Wireless computer adapter documentation and vendor to do this.
Power LED or Power Adapter OK LED Not Lit
Power LED or
Power Adapter OK
LED Not Lit
■
Speed of connection: The 802.11b and 802.11g standards will
automatically choose the best speed depending on the quality of your
connection. As the signal quality weakens then the speed falls back to
a lower speed. The speeds supported by 802.11g are 54 Mbps,
48 Mbps, 36 Mbps, 24 Mbps, 18 Mbps, 12 Mbps, and 6 Mbps. The
speeds supported by 802.11b are 11 Mbps, 5.5 Mbps, 2 Mbps and
1 Mbps. In general the closer you are to the Router the better the
speed. If you are not achieving the speed you had anticipated then try
moving the antenna on the Router or moving the Wireless computer
closer to the Router. In an ideal network the Router should be located
in the centre of the network with Wireless computers distributed
around it. Applications are generally available with the computer
wireless card to carry out a site survey. Use this application to find the
optimal siting for your wireless computer. Consult your Computer
Card documentation and vendor for more details.
■
Check that your Router is receiving power by looking at the status of
the Power LED on the front panel and the Power Adapter OK LED on
the rear panel:
■
■
■
■
Replacement Power
Adapters
87
If both LEDs are lit green then the unit is receiving power.
If both LEDs are unlit then no power is being supplied to the unit.
Check that the power adapter is plugged into a working mains
outlet and that the mains outlet is supplying power. If the mains
socket is supplying power then the power adapter or power
adapter connection may be faulty. See “Replacement Power
Adapters” below.
If the Power Adapter OK LED is lit but the Power LED is unlit then
there may be a fault with your unit. Contact 3Com Technical
Support.
Check that you are using the correct power adapter for your Router.
You should only use the power adapter supplied with your Router.
If both the Power Adapter OK LED and Power LED are off, check your
power adapter connection. If the mains outlet is working and is capable
of supplying power to other devices, contact 3Com Technical Support
and ask for a replacement power adapter. Please quote the power
adapter part number shown on the OfficeConnect power adapter you
are using.
88
CHAPTER 6: TROUBLESHOOTING
Alternatively, quote the part number for your region:
Table 3 Power Adapter Part Numbers
Alert LED
Recovering from
Corrupted Software
Part Number
Region
3C16740A
US and Canada
3C16741A
UK
3C16742A
Europe and Middle East
3C16743A
Japan
3C16744A
Australasia (except Japan and Korea)
3C16745A
South Africa
3C16747A
Korea
3C16748A
Argentina
The Alert LED will flash when the Router unit is first powered up while
the system software checks the hardware for proper operation. Once the
Router has started normal operation, the Alert LED will go out.
■
If the Alert LED does not go out following start up, but illuminates
continuously, this indicates that the software has detected a possible
fault with the hardware. Remove power from the Router, wait 10
seconds and then re-apply power. If the Alert LED comes on
continuously again, then a fault has been detected. Locate the copy of
the Router software on the accompanying CD-ROM or 3Com web site
(http://www.3com.com) and upload it to the Router to see if this
clears the fault (refer to “Recovering from Corrupted Software”
below). If this does not fix the problem, contact your supplier for
further advice.
■
During normal operation, you may notice the Alert LED lighting briefly
from time to time. This indicates that the Router has detected a hacker
attack from the Internet and has prevented it from harming your
network. You need take no specific action on this, unless you decide
that these attacks are happening frequently in which case you may
wish to discuss this with your ISP. The Router logs such attacks, and
this information is available through the Status and Logs screens.
If the Alert LED remains permanently on following power-up, it is possible
that the system software has become corrupted. In this condition, the
Router will enter a “recovery” state; DHCP is disabled, and the LAN IP
Frequently Asked Questions
89
address is set to 192.168.1.1. Follow the instructions below to upload a
new copy of the system software to a Router unit in this state.
Ensure that one of your computers has a copy of the new software image
file stored on its hard disk or available on CD-ROM.
The latest software is available on 3Com’s Web site at:
www.3com.com.
1 Remove power from the Router and disconnect the Cable/DSL modem
and all your computers, except for the one computer with the software
image.
2 You will need to reconfigure this computer with the following static IP
address information:
■
IP address: 192.168.1.2
■
Subnet mask: 255.255.255.0
■
Default Router address: 192.168.1.1
3 Restart the computer, and re-apply power to the Router.
4 Using the Web browser on the computer, enter the following URL in the
location bar:
http://192.168.1.1.
This will connect you to the Microcode Recovery utility in the Router.
5 Follow the on-screen instructions. Enter the path and filename of the
software image file.
6 When the upload has completed, the Router will restart, run the self-test
and, if successful, resume normal operation. The Alert LED will go out.
7 Refer to the Installation Guide to reconnect your Router to the Cable/DSL
modem and the computers in your network. Do not forget to reconfigure
the computer you used for the software upload.
If the Router does not resume normal operation following the upload, it
may be faulty. Contact your supplier for advice.
Frequently Asked
Questions
How do I reset the Router to Factory Defaults?
See “Forgotten Password and Reset to Factory Defaults” on
page 85.
90
CHAPTER 6: TROUBLESHOOTING
How many computers on the LAN does the Router support?
A maximum of 253 computers on the LAN are supported.
How many wireless clients does the Cable/DSL Router support?
A maximum of 128 wireless clients are supported.
There are only 4 LAN ports on the Router. How are additional
computers connected?
You can expand the number of connections available on your LAN
by using hubs, switches and wireless access points connected to
the Router. 3Com wireless access points and OfficeConnect hubs
and switches provide a simple, reliable means of expanding your
network; contact your supplier for more information, or visit:
http://www.3com.com/
Does the Router support virtual private networks (VPNs)?
The Router supports VPN passthrough, which allows VPN clients on
the LAN to communicate with VPN hosts on the Internet. It is also
possible to set up VPN hosts on your LAN that clients elsewhere on
the Internet can connect to, but this is not a recommended
configuration.
Where can I download software updates for the Router?
Updates to the Router software are posted on the 3Com support
web site, accessible by visiting:
http://www.3com.com
What other online resources are there?
The 3Com Knowledgebase at:
http://knowledgebase.3com.com
is a database of technical information covering all 3Com products.
It is updated daily with information from 3Com technical support
services, and it is available 24 hours a day, 7 days a week.
A
Running the
Discovery
Application
USING DISCOVERY
3Com provides a user friendly Discovery application for detecting the
Router on the network.
Windows Installation
(95/98/2000/Me/NT)
1 Insert the Router CD-ROM in the CD-ROM drive on your computer. A
menu will appear; select Router Discovery.
Discovery will find the Router even if it is unconfigured or misconfigured.
Figure 66 Discovery Welcome Screen
2 When the Welcome screen is displayed click on Next and wait until the
application discovers the Routers connected to your LAN.
92
APPENDIX A: USING DISCOVERY
Figure 67 Discovered Router Screen
3 Figure 68 shows an example Discovered Devices screen. Highlight the
Cable/DSL Router by clicking on it, and press Next.
Figure 68 Discovery Finish Screen
4 Click on Finish to launch a web browser and display the login page for
the Router.
B
IP ADDRESSING
The Internet
Protocol Suite
The Internet protocol suite consists of a well-defined set of
communications protocols and several standard application protocols.
Transmission Control Protocol/Internet Protocol (TCP/IP) is probably the
most widely known and is a combination of two of the protocols (IP and
TCP) working together. TCP/IP is an internationally adopted and
supported networking standard that provides connectivity between
equipment from many vendors over a wide variety of networking
technologies.
Managing the
Router over the
Network
To manage a device over the network, the Router must be correctly
configured with the following IP information:
IP Addresses and
Subnet Masks
■
An IP address
■
A Subnet Mask
Each device on your network must have a unique IP address to operate
correctly. An IP address identifies the address of the device to which data
is being sent and the address of the destination network. IP addresses
have the format n.n.n.x where n is a decimal number between 0 and 255
and x is a number between 1 and 254 inclusive.
However, an IP Address alone is not enough to make your device operate.
In addition to the IP address, you need to set a subnet mask. All networks
are divided into smaller sub-networks and a subnet mask is a number
that enables a device to identify the sub-network to which it is
connected.
94
APPENDIX B: IP ADDRESSING
For your network to work correctly, all devices on the network must have:
■
The same sub-network address.
■
The same subnet mask.
The only value that will be different is the specific host device number.
This value must always be unique.
An example IP address is ‘192.168.100.8’. However, the size of the
network determines the structure of this IP Address. In using the Router,
you will probably only encounter two types of IP Address and subnet
mask structures.
Type One
In a small network, the IP address of ‘192.168.100.8’ is split into two
parts:
■
Part one (‘192.168.100’) identifies the network on which the device
resides.
■
Part two (‘.8’) identifies the device within the network.
This type of IP Address operates on a subnet mask of ‘255.255.255.0’.
See Table 4 for an example about how a network with three computers
and a Router might be configured.
Table 4 IP Addressing and Subnet Masking
Device
IP Address
Subnet Mask
PC 1
192.168.100.8
255.255.255.0
PC 2
192.168.100.33
255.255.255.0
PC 3
192.168.100.188
255.255.255.0
Router
192.168.100.72
255.255.255.0
Type Two
In larger networks, where there are more devices, the IP address of
‘192.168.100.8’ is, again, split into two parts but is structured differently:
■
Part one (‘192.168’) identifies the network on which the device
resides.
■
Part two (‘.100.8’) identifies the device within the network.
How does a Device Obtain an IP Address and Subnet Mask?
95
This type of IP Address operates on a subnet mask of ‘255.255.0.0’.
See Table 5 for an example about how a network (only four computers
represented) and a Router might be configured.
Table 5 IP Addressing and Subnet Masking
How does a Device
Obtain an IP
Address and Subnet
Mask?
DHCP Addressing
Device
IP Address
Subnet Mask
PC 1
192.168.100.8
255.255.0.0
PC 2
192.168.201.30
255.255.0.0
PC 3
192.168.113.155
255.255.0.0
PC 4
192.168.002.230
255.255.0.0
Router
192.168.002.72
255.255.0.0
There are three different ways to obtain an IP address and the subnet
mask. These are:
■
Dynamic Host Configuration Protocol (DHCP) Addressing
■
Static Addressing
■
Automatic Addressing (Auto-IP Addressing)
The Router contains a DHCP server, which allows computers on your
network to obtain an IP address and subnet mask automatically. DHCP
assigns a temporary IP address and subnet mask which gets reallocated
once you disconnect from the network.
DHCP will work on any client Operating System such as Windows® 95,
Windows 98 or Windows NT 4.0. Also, using DHCP means that the same
IP address and subnet mask will never be duplicated for devices on the
network. DHCP is particularly useful for networks with large numbers of
users on them.
Static Addressing
Auto-IP Addressing
You must enter an IP Address and the subnet mask manually on every
device. Using a static IP and subnet mask means the address is
permanently fixed.
Network devices use automatic IP addressing if they are configured to
acquire an address using DHCP but are unable to contact a DHCP server.
Automatic IP addressing is a scheme where devices allocate themselves
96
APPENDIX B: IP ADDRESSING
an IP address at random from the industry standard subnet of
169.254.x.x (with a subnet mask of 255.255.0.0). If two devices allocate
themselves the same address, the conflict is detected and one of the
devices allocates itself a new address.
Automatic IP addressing support was introduced by Microsoft in the
Windows 98 operating system and is also supported in Windows 2000.
C
TECHNICAL SPECIFICATIONS
This section lists the technical specifications for the OfficeConnect 11g
Cable/DSL Router.
11g Cable/DSL
Router
Interfaces
Cable/DSL modem connection — 10Mbps/100Mbps dual speed Ethernet
port (10BASE-T/100BASE-TX)
LAN connection — four 10Mbps/100Mbps dual speed Ethernet ports
(10BASE-T/100BASE-TX)
WLAN Interfaces
Standard IEEE 802.11g, Direct Sequence Spread Spectrum (DSSS)
Transmission rate: 54Mbps, automatic fallback to 48, 36, 24, 18, 12, or
6 Mbps
Maximum channels: 14
Range up to 304.8m (1000ft)
Frequency: (US/Canada/Europe) 2.400-2.4835 GHz
Sensitivity: 6, 12, 18, 24, 36, 48 Mbps: -85 dBm;
54 Mbps -66 dBm typical
Modulation: CCK, BPSK, QPSK, OFDM
Encryption: 40/64 bit WEP, 128 bit WEP, WPA
Maximum clients: 128
O/P Power: 18dBm
Standard IEEE 802.11b, Direct Sequence Spread Spectrum (DSSS)
Transmission rate: 11bps, automatic fallback to 5.5, 2, or 1 Mbps
Maximum channels: 14
Range up to 304.8m (1000ft)
Frequency: (US/Canada/Europe) 2.400-2.4835 GHz
Sensitivity: 1, 2, 5.5 Mbps: -85 dBm; 11 Mbps -82 dBm typical
Modulation: CCK, BPSK, QPSK, OFDM
98
APPENDIX C: TECHNICAL SPECIFICATIONS
Encryption: 40/64 bit WEP, 128 bit WEP, WPA
Maximum clients: 128
O/P Power 18dBm
Operating Temperature
0 °C to 40 °C (32 °F to 105 °F)
Power
7VA, 23.9 BThU/hr
Humidity
0 % to 90 % (non-condensing) humidity
Dimensions
■
Width = 220 mm (8.7 in.)
■
Depth = 135 mm (5.3 in.)
■
Height = 24 mm (1 in.)
Weight
Approximately 500 g (1.1 lbs)
Standards
Functional:
ISO 8802/3
IEEE 802.3
IEEE 802.11b, 802.11g, Wi-Fi
Safety:
UL60950
CSA 22.2 #60950
IEC 60950
EN 60950
EMC:
EN 55022 Class B
EN 55024
CISPR 22
FCC Part 15 Class B*
ICES-003 Class B
CNS 13438 Class A
ETSI EN 301 489–17
Radio
CFR 47 FCC Part 15.207, 15.209, 15.247 and 15.249.
ETS 300 328 (2.4 GHz ISM band wide band transmission
99
systems.
RSS-210
Environmental: EN 60068 (IEC 68)
*See “FCC Statement” on page 119 for conditions of operation.
System Requirements
Operating Systems
The Router will support the following Operating Systems:
■
Windows 95/98
■
Windows NT 4.0
■
Windows ME
■
Windows 2000
■
Windows XP
■
Mac OS 8.5 or higher
■
Unix
Ethernet Performance
The Router complies to the IEEE 802.3i, u and x specifications.
Wireless Performance
The Router has been designed to conform to the Wi-Fi interoperability
test standard.
Cable Specifications
The Router supports the following cable types and maximum lengths:
■
Category 3 (Ethernet) or Category 5 (Fast Ethernet or Dual Speed
Ethernet) Twisted Pair — shielded and unshielded cable types.
■
Maximum cable length of 100m (327.86 ft).
100
APPENDIX C: TECHNICAL SPECIFICATIONS
D
SAFETY INFORMATION
Important Safety
Information
WARNING: Warnings contain directions that you must follow for your
personal safety. Follow all directions carefully.
You must read the following safety information carefully before you
install or remove the unit:
WARNING: The Router generates and uses radio frequency (rf) energy. In
some environments, the use of rf energy is not permitted. The user
should seek local advice on whether or not rf energy is permitted within
the area of intended use.
WARNING: Exceptional care must be taken during installation and
removal of the unit.
WARNING: Only stack the Router with other OfficeConnect units.
WARNING: To ensure compliance with international safety standards,
only use the power adapter that is supplied with the unit.
WARNING: The socket outlet must be near to the unit and easily
accessible. You can only remove power from the unit by disconnecting
the power cord from the outlet.
WARNING: This unit operates under SELV (Safety Extra Low Voltage)
conditions according to IEC 60950. The conditions are only maintained
if the equipment to which it is connected also operates under SELV
conditions.
WARNING: There are no user-replaceable fuses or user-serviceable
parts inside the Router. If you have a physical problem with the unit
that cannot be solved with problem solving actions in this guide,
contact your supplier.
102
APPENDIX D: SAFETY INFORMATION
WARNING: Disconnect the power adapter before moving the unit.
WARNING: RJ-45 ports. These are shielded RJ-45 data sockets. They
cannot be used as telephone sockets. Only connect RJ-45 data
connectors to these sockets.
Wichtige
Sicherheitshinweise
VORSICHT: Warnhinweise enthalten Anweisungen, die Sie zu Ihrer
eigenen Sicherheit befolgen müssen. Alle Anweisungen sind sorgfältig
zu befolgen.
Sie müssen die folgenden Sicherheitsinformationen sorgfältig
durchlesen, bevor Sie das Geräts installieren oder ausbauen:
VORSICHT: Der Router erzeugt und verwendet Funkfrequenz (RF). In
manchen Umgebungen ist die Verwendung von Funkfrequenz nicht
gestattet. Erkundigen Sie sich bei den zuständigen Stellen, ob die
Verwendung von Funkfrequenz in dem Bereich, in dem der Bluetooth
Access Point eingesetzt werden soll, erlaubt ist.
VORSICHT: Bei der Installation und beim Ausbau des Geräts ist mit
höchster Vorsicht vorzugehen.
VORTSICHT: Stapeln Sie das Geräts nur mit anderen OfficeConnect
Gerätes zusammen.
VORSICHT: Aufgrund von internationalen Sicherheitsnormen darf das
Gerät nur mit dem mitgelieferten Netzadapter verwendet werden.
VORSICHT: Die Netzsteckdose muß in der Nähe des Geräts und leicht
zugänglich sein. Die Stromversorgung des Geräts kann nur durch
Herausziehen des Gerätenetzkabels aus der Netzsteckdose
unterbrochen werden.
VORSICHT: Der Betrieb dieses Geräts erfolgt unter den
SELV-Bedingungen (Sicherheitskleinstspannung) gemäß IEC 60950.
Diese Bedingungen sind nur gegeben, wenn auch die an das Gerät
angeschlossenen Geräte unter SELV-Bedingungen betrieben werden.
103
VORSICHT: Es sind keine von dem Benutzer zu ersetzende oder zu
wartende Teile in dem Gerät vorhanden. Wenn Sie ein Problem mit
dem Router haben, das nicht mittels der Fehleranalyse in dieser
Anleitung behoben werden kann, setzen Sie sich mit Ihrem Lieferanten
in Verbindung.
VORSICHT: Vor dem Ausbau des Geräts das Netzadapterkabel
herausziehen.
VORSICHT: RJ-45-Anschlüsse. Dies sind abgeschirmte
RJ-45-Datenbuchsen. Sie können nicht als Telefonanschlußbuchsen
verwendet werden. An diesen Buchsen dürfen nur RJ-45-Datenstecker
angeschlossen werden.
Consignes
importantes de
sécurité
AVERTISSEMENT: Les avertissements présentent des consignes que
vous devez respecter pour garantir votre sécurité personnelle. Vous
devez respecter attentivement toutes les consignes.
Nous vous demandons de lire attentivement les consignes suivantes de
sécurité avant d’installer ou de retirer l’appareil:
AVERTISSEMENT: La Router fournit et utilise de l'énergie
radioélectrique (radio fréquence -rf). L'utilisation de l'énergie
radioélectrique est interdite dans certains environnements. L'utilisateur
devra se renseigner sur l'autorisation de cette énergie dans la zone
prévue.
AVERTISSEMENT: Faites très attention lors de l'installation et de la
dépose du groupe.
AVERTISSEMENT: Seulement entasser le moyer avec les autres moyeux
OfficeConnects.
AVERTISSEMENT: Pour garantir le respect des normes internationales
de sécurité, utilisez uniquement l'adaptateur électrique remis avec cet
appareil.
AVERTISSEMENT: La prise secteur doit se trouver à proximité de
l’appareil et son accès doit être facile. Vous ne pouvez mettre l’appareil
hors circuit qu'en débranchant son cordon électrique au niveau de
cette prise.
104
APPENDIX D: SAFETY INFORMATION
AVERTISSEMENT: L’appareil fonctionne à une tension extrêmement
basse de sécurité qui est conforme à la norme CEI 60950. Ces
conditions ne sont maintenues que si l'équipement auquel il est
raccordé fonctionne dans les mêmes conditions.
AVERTISSEMENT: Il n’y a pas de parties remplaceables par les
utilisateurs ou entretenues par les utilisateurs à l’intérieur du moyeu. Si
vous avez un problème physique avec le moyeu qui ne peut pas être
résolu avec les actions de la résolution des problèmes dans ce guide,
contacter votre fournisseur.
AVERTISSEMENT: Débranchez l'adaptateur électrique avant de retirer
cet appareil.
AVERTISSEMENT: Ports RJ-45. Il s'agit de prises femelles blindées de
données RJ-45. Vous ne pouvez pas les utiliser comme prise de
téléphone. Branchez uniquement des connecteurs de données RJ-45 sur
ces prises femelles.
E
END USER SOFTWARE LICENSE
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END USER SOFTWARE LICENSE AGREEMENT
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106
APPENDIX E: END USER SOFTWARE LICENSE AGREEMENT
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F
Information
Regarding Popular
ISPs
ISP INFORMATION
WAN Types
Characteristics
Popular ISPs
Dynamic IP
Cable modem ISP, non-hostname
based. Need to clone the MAC
address in the Advanced tab of
the Internet Settings page.
MediaOne, RoadRunner,
Optimum Online, Time Warner,
Charter, Adelphia, Metrocast.
(Clone MAC)
Dynamic IP
(Hostname)
PPPoE
(DSL)
PPTP
Cable ISP, Requires Hostname to @Home Network, Cogoco,
authenticate ie. cx213818-B.
ComCast, Cox, Excite, Rogers,
Need to enter the hostname in the Shaw, Insight, Videotron
Internet Settings page.
Usually special software installed
on PC, MacPOET/WinPOET,
EnterNet 300. The Router has this
software built in and you can
remove it from your PC. You will
need to enter the user name and
password that your ISP provided
to you in the PPPoE page of the
Router. Leave the service name
blank unless your ISP requires it.
Bell*, Century Tel, Citizens,
Primus, Prodigy, Snet, Sprint FC,
Verizon, First World, Brightnet,
Earthlink, Ameritech, Covad,
Mindspring, Sympatico DSL,
USwest, Owest, SNet
Cable or DSL, always on. Some
European ISPs require a PPTP
tunnel to authenticate their
network.
KPN (Netherlands), Austria
Telecom
108
APPENDIX F: ISP INFORMATION
Static
(DSL)
Static
(Cable)
DSL Modem, always on. Need to
enter ALL IP information from ISP
in the Static IP address section of
the Internet Settings page.
CableSpeed, Cnet, Direct Link,
Drizzle, DSL Extreme, Earthlink
Wireless, Fast Point, Flashcom,
GTE-WhirlWind, Heavenet, HSA
Corp, I-55, InterAccess, LinkLine,
Mission, Nauticom, NAS, Omitel,
Onterra, Phatpipe, Rhythms,
Speakeasy, Sterling, XO, Zyan
Cable Modem, Always on, ISP
Cox Cable, Sprint, US Cable,
assigns specific IP information
Cable-Cable
which needs to be entered on the
“Fixed IP” page of the Router.
*Bell includes Bell Advantage, Bell Canada, Bell South, PacBell and
Southwestern Bell.
GLOSSARY
802.11b
The IEEE specification for wireless Ethernet which allows speeds of up to
11 Mbps. The standard provides for 1, 2, 5.5 and 11 Mbps data rates.
The rates will switch automatically depending on range and environment.
802.11g
The IEEE specification for wireless Ethernet which allows speeds of up to
54 Mbps. The standard provides for 6, 12, 24, 36, 48 and 54 Mbps data
rates. The rates will switch automatically depending on range and
environment.
10BASE-T
The IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5
twisted pair cable.
100BASE-TX
The IEEE specification for 100 Mbps Fast Ethernet over Category 5
twisted-pair cable.
Access Point
An Access Point is a device through which wireless clients connect to
other wireless clients and which acts as a bridge between wireless clients
and a wired network, such as Ethernet. Wireless clients can be moved
anywhere within the coverage area of the access point and still connect
with each other. If connected to an Ethernet network, the access point
monitors Ethernet traffic and forwards appropriate Ethernet messages to
the wireless network, while also monitoring wireless client radio traffic
and forwarding wireless client messages to the Ethernet LAN.
Ad Hoc mode
Ad Hoc mode is a configuration supported by most wireless clients. It is
used to connect a peer to peer network together without the use of an
access point. It offers lower performance than infrastructure mode, which
is the mode the Router uses. (see also Infrastructure mode.)
Auto-negotiation
Some devices in the OfficeConnect range support auto-negotiation.
Auto-negotiation is where two devices sharing a link, automatically
110
GLOSSARY
configure to use the best common speed. The order of preference (best
first) is: 100BASE-TX full duplex, 100BASE-TX half duplex, 10BASE-T full
duplex, and 10BASE-T half duplex. Auto-negotiation is defined in the IEEE
802.3 standard for Ethernet and is an operation that takes place in a few
milliseconds.
Bandwidth
The information capacity, measured in bits per second, that a channel can
transmit. The bandwidth of Ethernet is 10 Mbps, the bandwidth of Fast
Ethernet is 100 Mbps. The bandwidth for 802.11b wireless is 11Mbps.
Category 3 Cables
One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-586
standard. Category 3 is voice grade cable and can only be used in
Ethernet networks (10BASE-T) to transmit data at speeds of up to 10
Mbps.
Category 5 Cables
One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-586
standard. Category 5 can be used in Ethernet (10BASE-T) and Fast
Ethernet networks (100BASE-TX) and can transmit data up to speeds of
100 Mbps. Category 5 cabling is better to use for network cabling than
Category 3, because it supports both Ethernet (10 Mbps) and Fast
Ethernet (100 Mbps) speeds.
Channel
Similar to any radio device, the OfficeConnect Cable/DSL Router allows
you to choose different radio channels in the wireless spectrum. A
channel is a particular frequency within the 2.4GHz spectrum within
which the Router operates.
Client
The term used to described the desktop PC that is connected to your
network.
DHCP
Dynamic Host Configuration Protocol. This protocol automatically assigns
an IP address for every computer on your network. Windows 95,
Windows 98 and Windows NT 4.0 contain software that assigns IP
addresses to workstations on a network. These assignments are made by
the DHCP server software that runs on Windows NT Server, and Windows
95 and Windows 98 will call the server to obtain the address. Windows
98 will allocate itself an address if no DHCP server can be found.
DNS Server Address
DNS stands for Domain Name System, which allows Internet host
computers to have a domain name (such as 3com.com) and one or more
GLOSSARY
111
IP addresses (such as 192.34.45.8). A DNS server keeps a database of
host computers and their respective domain names and IP addresses, so
that when a domain name is requested (as in typing “3com.com” into
your Internet browser), the user is sent to the proper IP address. The DNS
server address used by the computers on your home network is the
location of the DNS server your ISP has assigned.
DSL modem
DSL stands for digital subscriber line. A DSL modem uses your existing
phone lines to send and receive data at high speeds.
Encryption
A method for providing a level of security to wireless data transmissions.
The OfficeConnect Cable/DSL Router and Cable/DSL Router uses two
levels of encryption; 40/64 bit and 128 bit. 128 bit is a more powerful
level of encryption than 40/64 bit.
ESSID
Extended Service Set Identifier. The ESSID is a unique identifier for your
wireless network. You must have the same ESSID entered into the Router
and each of it's wireless clients.
Ethernet
Ethernet Address
Fast Ethernet
A LAN specification developed jointly by Xerox, Intel and Digital
Equipment Corporation. Ethernet networks use CSMA/CD to transmit
packets at a rate of 10 Mbps over a variety of cables.
See MAC address.
An Ethernet system that is designed to operate at 100 Mbps.
Firewall
Electronic protection that prevents anyone outside of your network from
seeing your files or damaging your computers.
Full Duplex
A system that allows packets to be transmitted and received at the same
time and, in effect, doubles the potential throughput of a link.
Router
A device that acts as a central hub by connecting to each computer's
network interface card and managing the data traffic between the local
network and the Internet.
Half Duplex
A system that allows packets to transmitted and received, but not at the
same time. Contrast with full duplex.
112
GLOSSARY
Hub
A device that regenerates LAN traffic so that the transmission distance of
that signal can be extended. Hubs are similar to repeaters, in that they
connect LANs of the same type; however they connect more LANs than a
repeater and are generally more sophisticated.
IEEE
Institute of Electrical and Electronics Engineers. This American
organization was founded in 1963 and sets standards for computers and
communications.
IETF
Internet Engineering Task Force. An organization responsible for
providing engineering solutions for TCP/IP networks. In the network
management area, this group is responsible for the development of the
SNMP protocol.
Infrastructure mode
Infrastructure mode is the wireless configuration supported by the Router.
You will need to ensure all of your clients are set up to use infrastructure
mode in order for them to communicate with the Access Point built into
your Router. (see also Ad Hoc mode)
IP
Internet Protocol. IP is a layer 3 network protocol that is the standard for
sending data through a network. IP is part of the TCP/IP set of protocols
that describe the routing of packets to addressed devices. An IP address
consists of 32 bits divided into two or three fields: a network number and
a host number or a network number, a subnet number, and a host
number.
IP Address
Internet Protocol Address. A unique identifier for a device attached to a
network using TCP/IP. The address is written as four octets separated
with periods (full-stops), and is made up of a network section, an
optional subnet section and a host section.
ISP
Internet Service Provider. An ISP is a business that provides connectivity to
the Internet for individuals and other businesses or organizations.
LAN
Local Area Network. A network of end stations (such as PCs, printers,
servers) and network devices (hubs and switches) that cover a relatively
small geographic area (usually not larger than a floor or building). LANs
are characterized by high transmission speeds over short distances (up to
1000 metres).
GLOSSARY
113
MAC
Media Access Control. A protocol specified by the IEEE for determining
which devices have access to a network at any one time.
MAC Address
Media Access Control Address. Also called the hardware or physical
address. A layer 2 address associated with a particular network device.
Most devices that connect to a LAN have a MAC address assigned to
them as they are used to identify other devices in a network. MAC
addresses are 6 bytes long.
NAT
Network Address Translation. NAT enables all the computers on your
network to share one IP address. The NAT capability of the Router allows
you to access the Internet from any computer on your home network
without having to purchase more IP addresses from your ISP.
Network
A Network is a collection of computers and other computer equipment
that are connected for the purpose of exchanging information or sharing
resources. Networks vary in size, some are within a single room, others
span continents.
Network Interface
Card (NIC)
Protocol
A circuit board installed into a piece of computing equipment, for
example, a computer, that enables you to connect it to the network. A
NIC is also known as an adapter or adapter card.
A set of rules for communication between devices on a network. The
rules dictate format, timing, sequencing and error control.
PPPoE
Point-to-Point Protocol over Ethernet. Point-to-Point Protocol is a method
of data transmission originally created for dial-up connections; PPPoE is
for Ethernet connections.
PPTP
Point-to-Point Tunneling Protocol is a method of secure data transmission
between two remote sites over the internet.
RJ-45
A standard connector used to connect Ethernet networks. The “RJ”
stands for “registered jack”.
Server
A computer in a network that is shared by multiple end stations. Servers
provide end stations with access to shared network services such as
computer files and printer queues.
114
GLOSSARY
SSID
Service Set Identifier. Some vendors of wireless products use SSID
interchangeably with ESSID.
Subnet Address
An extension of the IP addressing scheme that allows a site to use a single
IP network address for multiple physical networks.
Subnet mask
A subnet mask, which may be a part of the TCP/IP information provided
by your ISP, is a set of four numbers configured like an IP address. It is
used to create IP address numbers used only within a particular network
(as opposed to valid IP address numbers recognized by the Internet,
which must assigned by InterNIC).
Subnets
A network that is a component of a larger network.
Switch
A device that interconnects several LANs to form a single logical LAN that
comprises of several LAN segments. Switches are similar to bridges, in
that they connect LANs of a different type; however they connect more
LANs than a bridge and are generally more sophisticated.
TCP/IP
Transmission Control Protocol/Internet Protocol. This is the name for two
of the most well-known protocols developed for the interconnection of
networks. Originally a UNIX standard, TCP/IP is now supported on almost
all platforms, and is the protocol of the Internet.
TCP relates to the content of the data travelling through a network —
ensuring that the information sent arrives in one piece when it reaches its
destination. IP relates to the address of the end station to which data is
being sent, as well as the address of the destination network.
Traffic
The movement of data packets on a network.
universal plug and
play
Universal plug and play is a system which allows compatible applications
to read some of their settings from the Router. This allows them to
automatically configure some, or all, of their settings and need less user
configuration.
URL Filter
A URL Filter is a feature of a firewall that allows it to stop its clients form
browsing inappropriate Web sites.
GLOSSARY
115
WAN
Wide Area Network. A network that connects computers located in
geographically separate areas (for example, different buildings, cities, or
countries). The Internet is an example of a wide area network.
WECA
Wireless Ethernet Compatibility Alliance. An industry group formed to
certify cross vendor interoperability and compatibility of 802.11b and
802.11g wireless networking products and to promote the standard for
enterprise, small business and home environments. (see also 802.11b,
802.11g, Wi-Fi)
WEP
Wired Equivalent Privacy. A shared key encryption mechanism for wireless
networking. Encryption strength is 40/64 bit or 128 bit.
Wi-Fi
Wireless Fidelity. This is the certification granted by WECA to products
that meet their interoperability criteria. (see also 802.11b, WECA)
Wireless Client
Wireless LAN Service
Area
Wizard
WLAN
WPA
The term used to describe a desktop or mobile PC that is wirelessly
connected to your wireless network
Another term for ESSID (Extended Service Set Identifier)
A Windows application that automates a procedure such as installation
or configuration.
Wireless Local Area Network. A WLAN is a group of computers and
devices connected together by wireless in a relatively small area (such as a
house or office).
Wi-Fi Protected Access. A dynamically changing encryption mechanism
for wireless networking. Encryption strength is 256 bit.
116
GLOSSARY
INDEX
Access Rights 69
Addresses
IP 93
Administration Password 32, 43
Automatic Addressing 95
dynamic IP address 57
PPPoE 57
PPTP 57
static IP address 57
IP Address 21, 36, 38, 45, 93
IP Allocation 58
ISP Connection 58
ISP Gateway Address 36
Cable Specifications 99
Channels 119
Clone MAC address 60
Configuration
backup 77
restore 77
Conventions
notice icons, About This Guide 8
text, About This Guide 8
Country Selection 30
LAN 38, 44
LED 14
Login 92
Logs 80
MAC Address 35, 46
deleting 54
modifying 54
DHCP 35, 38, 45, 95
DHCP Server 27
Discovery Application 91
DMZ 63
DNS 26, 36, 37, 60, 61, 63
primary 36, 37, 59
secondary 36, 37, 59
Dynamic 57
Dynamic IP Address 35, 57, 63
Firewall 63
Forgotten Password 85
Internet
addresses 93
Internet Addressing Mode 33
Internet Settings 57
Network
addresses 93
Networking
wireless 85
NIC
wireless 14
Password 29, 43
PC Privileges 67
PING 73
PPPoE 21, 28, 34, 57, 61
PPTP 21, 57, 62
Profile 55
Remote Administration 74
Reset to Factory Defaults 77, 85
118
INDEX
Restart 75
Safety Information 19
Security 73
Setup Wizard 29, 44
Special Applications 65
Specifications
technical 97
Static Addressing 95
Static IP Address 57, 59
Status 78
Subnet Mask 36, 38, 93
Summary 40
Support Information 80
Support Links 81
TCP/IP 25, 27, 38, 93
Technical
specifications 97
standards 97
Time Zone 32, 76
Unit Configuration 44
Upgrade 78
URL Filter 69
Virtual Servers 63, 64
WAN 33
Web Proxy 28
Wireless
authorized PCs 53
channel selection 47
client list 55
configuration 47
connection control 53
encryption 49
LED 15
networking 85
NIC 14
service area name 48
settings 39, 47
REGULATORY NOTICES FOR THE
11G CABLE/DSL ROUTER
Channels
Use of the Cable/DSL Router is only authorized for the channels approved
by each country. For proper installation, login to the management
interface and select your country from the drop down list. Table 5 below
details the channels permitted by the local regulatory agencies:
Table 5 Channels
Channels
Country
1 - 13
Australia, Austria, Bahrain, Belarus, Belgium, Chile, China, Costa
Rica, Croatia, Cyprus, Czech Republic, Denmark, Finland, France*,
Germany, Greece, Hong Kong, Hungary, Iceland, India, Indonesia,
Ireland, Italy, Liechtenstein, Lithuania, Luxembourg, Malaysia,
Netherlands, New Zealand, Norway, Paraguay, Peru, Philippines,
Poland, Portugal, Russia, Saudi Arabia, Singapore, Slovenia, South
Africa, South Korea, Spain, Sweden, Switzerland, Thailand, Turkey,
United Kingdom, Uruguay, Venezuela.
1 - 11
Argentina, Brazil, Canada, Columbia, Mexico, Taiwan, United States
10 - 13
France*, Jordan
5-7
Israel
1-14
Japan
* The channels available for use in France depend on the region in which
you are located.
FCC Statement
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules, and the
Canadian Department of Communications Equipment Standards entitled,
“Digital Apparatus,” ICES-003. These limits are designed to provide
reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
120
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation.
Information to the
User
If this equipment does cause interference to radio or television reception,
which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the
following measures:
■
Reorient the receiving antenna.
■
Relocate the equipment with respect to the receiver.
■
Move the equipment away from the receiver.
■
Plug the equipment into a different outlet so that equipment and
receiver are on different branch circuits.
■
Consult the dealer or an experienced radio/television technician for
help.
The user may find the following booklet prepared by the Federal
Communications Commission helpful:
How to Identify and Resolve Radio-TV Interference Problems
This booklet is available from the U.S. Government Printing Office,
Washington, DC 20402, Stock No. 004-000-00345-4. In order to meet
FCC emissions limits, this equipment must be used only with cables which
comply with IEEE 802.3.
FCC Declaration of
Conformity
We declare under our sole responsibility that the
Model:
3CRWE554G72
Description:
11g Cable/DSL Router
to which this declaration relates, is in conformity with the following
standards or other normative documents:
■
ANSI C63.4-1992 Methods of Measurement
■
Federal Communications Commission 47 CFR Part 15, subpart B
15.107 (a)Class B Conducted Limits
15.109 (a)Class B Radiated Emissions Limits
121
■
15.107 (e)Class B Conducted Limits
15.109 (g)Class B Radiated Emissions Limits
Exposure to Radio Frequency Radiation: The radiated output power of the
3Com OfficeConnect Cable/DSL Router is far below the FCC radio
frequency exposure limits. Nevertheless, the 3Com OfficeConnect
Cable/DSL Router shall be used in such manner that the potential for
human contact during normal operation is minimized. The distance
between the antennas and the user should not be less than
20 cm.
CE Statement
(Europe)
This product complies with the European Low Voltage Directive
73/23/EEC, EMC Directive 89/336/EEC as amended by European Directive
93/68/EEC and the Radio and Telecommunications Terminal Equipment
Directive 99/5/EC.
CSA Statement
This Class B digital apparatus meets all requirements of the Canadian
Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du
Règlement sur le matériel brouilleur du Canada.
BSMI Statement
FCC
CAUTION: To assure continued compliance, any changes or
modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate this equipment.
RF Exposure
Compliance
Statement (U.S.)
CAUTION: The 3Com OfficeConnect Cable/DSL Router has been certified
as a mobile computing device as per FCC Section 2.1091. In order to
comply with the FCC RF exposure requirements, the 3Com OfficeConnect
122
Cable/DSL Router must only be installed with approved antennas and a
minimum separation distance of 20 cm (8 in) must be maintained from
the antenna to any nearby persons.
Potential RF
Interference
(Canada)
CAUTION: To prevent radio interference to the licensed service, this
device is intended to be operated indoors and away from windows to
provide maximum shielding. Equipment (or it's transmit antenna) that is
installed outdoors is subject to licensing.
Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one
of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
FCC Caution: Any changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate this equipment.
IMPORTANT NOTE:
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with minimum
distance 20cm between the radiator & your body.
This transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
3Com declared that 3CRWE554G72T is limited in CH1~11 by specified firmware controlled
in USA.
3Com Corporation, Corporate Headquarters,
Copyright © 2003 3Com Corporation. All rights reserved.
5500 Great America Parkway, Santa Clara,
3Com and OfficeConnect are registered trademarks of
CA 95052-8145, USA.
3Com Corporation. All other company and product names
may be trademarks of their respective companies.
To learn more about 3Com products and services,
visit our World Wide Web site at www.3com.com
All specifications are subject to change without notice.
DUA0554-TAAA01
Rev. 01

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