Macsense Connectivity Network Router MIH 120 User Manual

User’s Manual  
XRouter  
(MIH-120)  
R
acsense  
.
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Safety Precautions  
1. Follow all warnings and instructions marked on the product.  
2. Slots and openings on the device are provided for ventilation.  
To protect it from overheating, these openings must not be  
blocked or covered.  
3. Do not use or store this product in an environment that exceeds  
temperature and humidity specifications. Do not place this  
product near a radiator or heat register, or in a built-in installa-  
tion unless adequate ventilation is provided.  
4. Before cleaning this product, unplug from wall outlet. Do not use  
liquid cleaners or aerosol cleaners. Use a damp cloth for  
cleaning.  
5. Do not place cords or cables where they may be walked on or  
tripped over.  
6. Be sure to comply with any applicable local safety standards or  
regulations.  
7. General purpose cables are provided with this product. Any  
cables or other requirements mandated by local authority are  
your responsibility.  
8. Cables that are attached to devices in different locations that  
have different power sources and grounding may have  
hazardous voltage potentials. Consult a qualified electrical  
consultant before installing the product to see if this  
phenomenon exists and, if necessary, take corrective action.  
9. Never touch annunciated telephone wires or terminals unless  
the line has been disconnected.  
10. Avoid using telephone equipment or installing the product  
during an electrical storm.  
11. Never install telephone jacks, lines, network cables, this  
product, or power connections in wet locations.  
12. Never spill liquid of any kind on the product.  
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Table of Contents  
ABOUT THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . .1  
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2  
BEFORE YOU START . . . . . . . . . . . . . . . . . . . . . . . . . . . .4  
Package Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4  
Items Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4  
System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . .4  
EASY INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Hardware Installation . . . . . . . . . . . . . . . . . . . . . . . . . . .5  
Software Configuration . . . . . . . . . . . . . . . . . . . . . . . . . .8  
Windows 95 TCP/IP Configuration . . . . . . . . . . . . . . . . .8  
Mac OS TCP/IP Configuration . . . . . . . . . . . . . . . . . . .12  
Setting up the XRouter Through a Web Browser . . . . . .14  
ADVANCED CONFIGURATION . . . . . . . . . . . . . . . . . . . . .17  
DHCP Server Settings . . . . . . . . . . . . . . . . . . . . . . . . . .17  
Virtual Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18  
Device Administration . . . . . . . . . . . . . . . . . . . . . . . . . . .19  
Status Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19  
DMZ Host . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19  
Firmware Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20  
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .21  
APPENDIX A SPECIFICATIONS . . . . . . . . . . . . . . . . . . . .22  
APPENDIX B Hardware Description . . . . . . . . . . . . . . . .23  
APPENDIX C GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . .25  
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About This Manual  
ABOUT THIS MANUAL  
This user manual describes how to connect a LAN to the Internet  
using the XRouter Internet Sharing Hub, MIH-120. This manual  
assumes you are familiar with the basics of personal computing and  
network environments. The material is organized as follows:  
Chapter  
Content  
Introduction  
Describes the features and main  
applications of the XRouter  
Before You Start  
Describes the environment needed to  
set up the XRouter  
Easy Installation  
Describes how to install the XRouter  
for ordinary applications  
Advanced Configuration  
Troubleshooting  
Describes the configuration options for  
the XRouter  
Lists problems and solutions one might  
encounter when using the XRouter  
Appendix A  
Appendix B  
Appendix C  
Hardware Description  
Specifications  
Glossary  
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Introduction  
INTRODUCTION  
Thank you for purchasing the XRouter MIH-120 Internet Sharing  
Hub. The XRouter functions as an easy-to-use communication device  
that allows you to connect a local area network (LAN) to the Internet  
affordably. With the XRouter you can get as many as 252 Macintosh or  
PC users online simultaneously through just one cable line or DSL,  
and one ISP account. The XRouter installs quickly and easily, and best  
of all, it’s a breeze to use.  
Sharing Internet Access  
The XRouter provides high-speed Internet access to multiple users  
by splitting the bandwidth from a cable line or from DSL (Digital  
Subscriber Line) into tiny portions and then routing these bandwidth  
“slices” to almost any number of Internet users. The fewer the number  
of users online at any one time, the faster the service each individual  
receives. Internet users on different nodes are not limited to looking at  
the same Web pages. Each node is functionally independent from the  
other nodes connected to the XRouter.  
Modems Supported  
The XRouter supports cable modems and DSL modems. The  
XRouter has one WAN (Wide Area Network) port for connecting the  
unit to either a cable modem or a DSL modem. Either technology  
should provide more than enough bandwidth to accommodate the  
needs of even large groups of Internet users.  
Built-in DHCP Server  
The XRouter’s built-in DHCP Server dramatically reduces the  
configuration and maintenance effort by allowing you to automatically  
configure the TCP/IP setting of computers over a local area network.  
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Introduction  
4-Port Ethernet Hub Inside  
In addition to providing Internet sharing capability, the XRouter  
also functions as an Ethernet hub, offering four 10BASE-T, RJ-45 ports  
that allow you to connect a series of computers to form a small LAN.  
Easy Configuration  
The XRouter can be configured through a Web browser, and fea-  
tures Web-based management for a simple, intuitive set up.  
Virtual Server  
Internet users can set up an in-house Web server, such as WWW  
or FTP, through the XRouter’s Virtual Server mapping function. The  
Virtual Server allows you to select a particular computer in your  
network to respond to outside Internet requests.  
Security  
The XRouter provides firewall-like security through NAT (Network  
Address Translation) to prevent unauthorized Internet users from  
accessing internal files. It can also filter out Internet requests from  
certain nodes on a local network for administrative purposes.  
NAT (Network Address Translation)  
The XRouter features NAT (Network Address Translation) as a  
means of translating private IP addresses into a global IP address that  
is, in turn, registered to the Internet. NAT essentially masks local IP  
addresses to the outside world, allowing a group of Internet users to  
share a single ISP account (which means you don’t have to buy sepa-  
rate accounts for each user).  
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Before You Start  
BEFORE YOU START  
Package Overview  
Please check to make sure your XRouter package includes the  
items listed below before setting up your XRouter.  
__ an XRouter  
__ a power adapter  
__ this user manual  
__ a Category-5 UTP cable with RJ-45 connectors  
Items Required  
__ an account from an ISP (Internet Service Provider)  
__ a cable line or DSL  
__ a cable modem or DSL modem  
__ additional UTP cables with RJ-45 connectors (for additional  
computers)  
System Requirements  
• Computer equipped with 10BASE-T Ethernet connection inter-  
face that supports TCP/IP protocol  
• Windows 95/98, Windows NT 4.0 or later versions  
• Mac OS 7.5.3 or later versions  
• Netscape Communicator 4.0 or above (Microsoft Internet  
Explorer 4.0 or later versions are necessary for Web configuration.)  
(NOTE: For future firmware upgrades, one of the operating  
systems listed above is needed.)  
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EASY INSTALLATION  
Hardware Installation  
Before connecting the XRouter to your LAN please verify that your  
cable or DSL service is active and operating correctly. If you are expe-  
riencing difficulties with your cable or DSL service, please contact your  
service provider before proceeding with this installation.  
Connecting the XRouter to Your Modem  
After verifying that your cable or DSL service is functioning properly,  
connect your cable modem or DSL modem to the XRouter by following  
the instructions below:  
1. If you have not already done so, disconnect the Ethernet cable  
from the computer that is currently connected to the DSL or  
cable modem.  
2. Plug the RJ-45 connector from this cable into the WAN (Wide  
Area Network) port on the back panel of the XRouter. (See  
Figure 1.1)  
3. Leave the other end of this Ethernet cable connected to the  
DSL modem or cable modem.  
LAN  
WAN  
Reset  
Ethernet  
Cable  
Ethernet  
Cable  
Ethernet  
Cable  
Mac  
Cable or DSL modem  
PC  
Figure 1.1 - Connecting the Xrouter  
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Easy Installation  
Connecting Computers to the XRouter  
When you have finished connecting the XRouter to your DSL or cable  
modem, you can begin connecting the Macintosh or PC computers in  
your local area network to the XRouter. There are two common meth-  
ods for connecting the computers in your LAN to the XRouter: (1) plug-  
ging computers directly into the XRouter, and (2) connecting the  
XRouter to your LAN hub.  
To connect computers directly to the XRouter:  
(NOTE: You will need an Ethernet cable for each additional  
computer you plan on connecting to the XRouter.)  
1. Plug one RJ-45 connector (of a standard twisted-pair Ethernet  
cable) to the Ethernet port on your computer.  
2. Plug the other end of this cable to any one of the  
XRouter’s four LAN ports (located on the left side of the  
XRouter’s rear panel. Refer to Figure 1.1)  
3. Repeat steps 1 and 2 for each computer you wish to provide  
with Internet access until all four XRouter LAN ports are filled.  
(NOTE: To connect more than four computers to the XRouter,  
simply plug additional computers into a network hub and  
then plug this hub into the XRouter’s uplink port. Read below.)  
To connect an existing LAN to the XRouter:  
As an alternative to connecting computers directly into the XRouter’s  
LAN ports, you can also connect a pre-existing network of computers  
to the XRouter by uplinking your network’s central LAN hub to the  
XRouter’s uplink port. (See Figure 1.2)  
To connect a LAN hub to the XRouter’s uplink port:  
1. Set the DIP switch (located on the XRouter’s rear panel just  
left of the No. 4 LAN port) from “straight” to “crossover” mode.  
Switch to left for  
crossover mode  
Switch to right for  
normal mode  
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2. Plug one RJ-45 connector (of a standard twisted-pair Ethernet  
cable) to the XRouter’s No. 4 LAN port.  
3. Plug the other end of this Ethernet cable into an available port  
on the network hub.  
(NOTE: Multiple network hubs can be connected to the  
XRouter’s LAN ports No.1-3 if these hubs are equipped with  
uplink ports. By daisy-chaining a series of hubs, you can  
connect up to 252 users to the XRouter.)  
LAN  
WAN  
Reset  
Ethernet Cables  
Hub  
Mac  
Cable Or DSL Modem  
PC  
Figure 1.2 - Connect an Existing LAN  
Connecting the Power Supply  
To provide your XRouter with power:  
1. Plug the power adapter of the XRouter into an AC power  
outlet.  
2. Plug the other end of the power adapter cable into the power  
receptacle on the rear panel of the unit.  
3. The Power LED on the XRouter’s front panel should be lit  
immediately.  
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Easy Installation  
Software Configuration  
Setting Up the TCP/IP  
Congratulations on installing the XRouter’s hardware! In the next  
pages we will show you how to enable communication between the  
XRouter and its managing and client computers.  
Part of the process of enabling communication involves setting the  
IP addresses for the computer that will be directly managing the  
XRouter’s operations and the client computers that will be receiving  
Internet access from the XRouter. These computers must have their IP  
addresses configured such that they share the same subnet number-  
ing scheme as the XRouter’s default IP address. We will explain this in  
more detail later in the chapter.  
Configuring the IP addresses of the managing and client comput-  
ers is a simple process that can be performed through your computer’s  
control panel. We have provided instructions for the configuration  
process for both Macintosh and PC users. Find the appropriate set of  
instructions in the pages that follow.  
Windows 95 TCP/IP Configuration of Computers  
1. Double-click the Control Panel icon in My Computer folder.  
2. From the Control Panel, double-click the Network icon. The  
network interface card (installed on your computer) appears  
along with the network protocol on the Configuration list.  
3. Double-click TCP/IP protocol on the list. If TCP/IP does not  
appear on the list, you must install the TCP/IP protocol first as  
illustrated in step 4. Clients with TCP/IP already installed may  
skip to step 5.  
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4. To install the TCP/IP protocol:  
a. Keep your copy of Windows 95/98 CD-ROM on hand.  
(You will need it for this installation.)  
b. Click the Add... button from the Configuration list of the  
Network window. A new window appears.  
c. Double-click Protocol. Then, in the Select Network Protocol  
window, choose Microsoft on the Manufacturers list, and  
select TCP/IP on the right side of the list.  
d. Follow the instructions that appear on the monitor to  
complete the installation.  
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Easy Installation  
5. After double-clicking the installed TCP/IP protocol, the TCP/IP  
properties window appears. To let the computer’s TCP/IP  
values be automatically assigned by the XRouter’s DHCP  
server:  
a. Click the IP Address tab from the TCP/IP properties window.  
b. Select the item Obtain IP address automatically. The  
XRouter automatically assigns values for the computer’s  
Gateway, DNS Configuration, and IP Address.  
6. After specifying the settings of TCP/IP click OK and then restart  
Windows to allow the settings to take effect.  
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Assigning TCP/IP Values Manually  
If you already have a DHCP server on the network, or if you prefer  
not using the XRouter’s DHCP server to assign TCP/IP values auto-  
matically, you can input these values manually.  
To enter values for the managing computer’s address manually:  
1. Click the IP Address tab from the TCP/IP properties window.  
2. In the IP Address field enter “192.168.1.x” where x is any  
variable of your choice ranging from 2 - 252. Enter  
255.255.255.0 in the Subnet Mask field.  
(NOTE: No two computers on the same LAN can have the  
same IP address or an IP address conflict will occur.)  
3. Click the DNS tab and enter the DNS IP addresses provided  
by your ISP in the DNS fields.  
4. Click the Gateway tab and enter a value in the Gateway IP  
address field. The Gateway IP address value must be the  
same as the XRouter's IP address; (the XRouter’s default IP  
address is 192.168.1.1).  
5. After specifying the settings of TCP/IP click OK and restart  
Windows to allow the settings to take effect.  
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Easy Installation  
Mac OS TCP/IP Configuration  
1. Open the TCP/IP control panel.  
2. In the Connect via menu select the Ethernet interface that is  
installed on your computer.  
3. In the Configure pull-down menu that appears, select Using  
DHCP Server to allow the built-in DHCP server of the XRouter  
to assign an IP address and other TCP/IP configuration infor-  
mation to the client automatically. Do this for each client that  
needs Internet access through the XRouter.  
4. Close the TCP/IP window and save the changes.  
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Assigning TCP/IP Values Manually  
If you already have a DHCP server on the network, or if you prefer  
not using the XRouter’s DHCP server to assign TCP/IP values auto-  
matically, you can input these values manually.  
To enter values for the managing computer’s address manually:  
1. In the Connect via menu select the Ethernet interface that is  
installed on your computer.  
2. In the Configure menu select Manually.  
a. In the IP Address field, enter “192.168.1.x” where x is any  
variable of your choice ranging from 2 - 252.  
(NOTE: No two computers on the same LAN can have the  
same IP address or an IP address conflict will occur.)  
b. In the Subnet Mask field enter 255.255.255.0.  
c. In the Router Address field enter 192.168.1.1, the XRouter’s  
default address.  
d. In the Name Server Address field enter the DNS information  
provided by your ISP. In the Search Domains field enter the  
domain information provided by your ISP.  
e. Close the TCP/IP window and save the changes.  
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Easy Installation  
Setting Up the XRouter Through a Web Browser  
Now that you have finished configuring the TCP/IP addresses of  
the client and managing computers, you can begin configuring the  
XRouter’s Internet settings. This can be done through a standard Web  
browser (such as Netscape Navigator, Netscape Communicator, or  
Microsoft Internet Explorer).  
(IMPORTANT: Before following the instructions below you must  
find out if your ISP is providing dynamic or static IP addressing. If your  
service is dynamic, you do not need to follow the instructions below  
because the XRouter automatically configures the TCP/IP information  
provided by your ISP and you should already have Internet access. If  
this is the case, you are done installing the XRouter and can begin  
accessing the Internet from any of the client computers. However, if  
your ISP has provided a static IP address or if you would like to make  
further changes to the advanced features, you will need to enter the  
Web-based configuration.)  
Enter the Web-based configuration:  
1. Launch your computer’s Web browser.  
(NOTE: Netscape Communicator 4.0, Internet Explorer 4.0 or  
above are necessary for configuring the XRouter. Other clients  
are not subject to this restriction.)  
2. Type the XRouter's default IP address (192.168.1.1) in the  
URL field. This is the area where you would normally enter a  
Web site address such as “www.macsensetech.com”.  
3. Press Enter. The Username and Password window appears.  
4. Leave the User name field blank and type “admin“ as the  
default password for the XRouter. You can change the pass-  
word through a Web management page later. Click OK to  
enter the Web management page.  
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5. The OnePage Setup window appears. Note that this page is  
divided into two basic sections -- Private IP Address, and  
Public IP Address.  
Host Name - This is an optional section. Some ISPs require a host  
name in order to be recognized by their systems. Your ISP should  
provide this if needed for their systems.  
Private IP Address - This section can be used to change the  
XRouter’s internal IP Address that is visible to the client computers on  
the LAN. However, we recommend that you do not alter the default IP  
address (192.168.1.1) unless you need to make modifications to fit your  
network environment.  
Public IP Address - This section can be used to manually enter IP  
address information provided by your ISP. You will not need to make any  
changes to the default values in this section if your ISP automatically  
assigns IP addresses. However, if your ISP has provided you with a  
static IP address, you will need to enter this information by following the  
instructions below.  
To make changes to the Public IP Address fields:  
1. Select Specify an IP Address.  
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Easy Installation  
2. Enter the static IP address provided by your ISP in the field  
located immediately to the right of “Specify an IP Address.”  
3. Leave the Public Subnet Mask as the default setting.  
4. In the Default Gateway IP Address field, enter the information  
provided by your ISP. Note that your ISP may refer to this  
information as a “Gateway/Router IP Address.” Also note that  
this number is not the same as the IP Address value that you  
entered in step 2.  
5. Enter the DNS information provided by your ISP in the Domain  
Name Server fields. Your ISP should provide at least two  
unique DNS numbers.  
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Advanced Configuration  
ADVANCED CONFIGURATION  
Please refer to the previous chapter on how to enter the Web  
Management page of the XRouter. The Advanced Menu contains four  
sub-menus including DHCP Settings, Virtual Server, Device Admin,  
and Status Monitor.  
DHCP Server Settings  
To alter the starting IP Address range, the number of users that  
are automatically assigned IP adressses on the LAN, or to disable the  
DHCP server, you must enter the DHCP Settings page to make  
changes.  
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Advanced Configuration  
Virtual Server  
It is possible to set up your own Web or FTP server on your net-  
work for external Internet users to access. Internet users simply need  
to enter the IP address that has been assigned to you. The XRouter  
will redirect the request of the Internet user to the specified internal  
hidden IP address of the TCP port request.  
(NOTE: It will be much more convenient to have a fixed address  
from your ISP. Failure to do so will result in being assigned a different  
IP address every time your connection to the ISP is reset.)  
For example, if you set up the TCP port 80 (HTTP: Hypertext  
Transfer Protocol) to be redirected to the IP address"192.168.1.2" on  
the Virtual Server setting, the request from the external Internet user  
via HTTP protocol (i.e. acquire Web page from browser) will be trans-  
ferred through the XRouter to the computer with the IP address  
"192.168.1.2" on your local network.  
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Advanced Configuration  
Device Administration  
This page displays information about the firmware version and  
MAC address of this XRouter. You can change the password or reset  
the device. Selecting Yes to the Factory defaults erases previously  
configured settings, returning the unit to its original default settings.  
Status Monitor  
This page provides information on the working status of the  
XRouter.  
DMZ (DeMilitarized ) Host  
This feature will open all in/out accesses for one LAN computer.  
This is useful for machines that host TCP/IP services that should be  
fully exposed to the public network. For example, Internet Gaming,  
NetMeeting, Timbuktu, or other types of services may require this type-  
of access. Please enter one LAN IP Address below. Activate this fea-  
ture only when required. (Entering “0” designates inactive)  
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Advanced Configuration  
Firmware Upgrade  
Macsense is continually improving the firmware (software pro-  
grammed on a PROM) in each of its products. The XRouter is shipped  
with the most up to date software available at production time. If a  
firmware upgrade becomes available, it will be posted in the “Service  
and Support” section of our Web site. To upgrade the XRouter, you will  
need the TFTP client and the firmware file named “Code.bin.” These  
Follow the upgrade procedure listed below.  
1. Download these two files from the firmware updater on our  
Web site: TFTP client, and “Code.bin”  
2. Double-click the TFTP client icon to run the program. Enter  
both the IP address of the XRouter and your password.  
3. Click the button beside the File Name field. A window appears.  
Select a location of the firmware file “Code.bin”.  
4. Click the Upgrade button to begin the upgrade process. After  
the upgrade is complete, remember to reset the XRouter by  
unplugging the device and then plugging it back in.  
(NOTE: Keep the firmware file name ”Code.bin” unchanged  
or the TFTP client software won’t recognize it.)  
5. If the upgrade has failed, the Ready/Test LED will be blinking  
on the XRouter. If this happens, try repeating steps 2 - 4 of  
this procedure.  
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Troubleshooting  
TROUBLESHOOTING  
This chapter provides solutions to problems that may occur during  
installation and operation of the XRouter MIH-120.  
1. The Link LED is off.  
• Check that all connectors are firmly plugged-in.  
• Check the power adapter making sure it is plugged into an  
electrical outlet.  
2. The collision LED is always lit.  
• Make sure the 10BASE-T cable has not exceeded the  
maximum 100-meter length limit.  
• Check all connectors to make sure they are firmly  
plugged into the appropriate ports.  
• Use category 5 cables as this grade of cable will give you  
the highest quality connection to the XRouter.  
• Check the RJ-45 connectors at both ends of the cable to  
make sure there is no faulty wiring.  
5. Can't connect to MIH-120 XRouter via Web browser.  
• Verify that the IP address 192.168.1.1 has been correctly  
entered in the URL field.  
• Check the network cable connection and LAN LED indicator  
on the XRouter.  
• Check out the TCP/IP setup on your client. Type "winipcfg"  
on DOS prompt under Windows 95 or open the TCP/IP con-  
trol panel on the Mac OS platform. The client should get an  
IP address of 192.168.1.x (where "x" is from 1 to 252.)  
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Appendix A  
APPENDIX A - Specifications  
Standards Compliance  
IEEE 802.3 10BASE-T  
TCP/IP, DHCP, DNS  
WAN Interface  
One 10BASE-T RJ-45 port  
LAN Interface  
Four 10BASE-T RJ-45 ports  
Web management  
Yes  
LED Display  
Power, Link/Activity for WAN/LAN ports, Collision/Partition for LAN  
ports  
Environment  
Operation Temperature  
0~45°C (32~113°F)  
-20~70°C (-4~158°F)  
Storage Temperature  
Humidity  
0~90%  
Dimensions  
LxWxH (mm)  
LxWxH (in.)  
142x236x46  
5.59x9.29x1.81  
Power  
AC9V, 1A  
Certifications  
EMI/EMC - FCC Class B / CE Mark Class A / VCCI Class 1  
Safety - CUL(UL&CSA)/LVD/TÜV  
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Appendix B  
APPENDIX B - Hardware Description  
Power  
green  
Indicates that there is power to the unit.  
Ready/Test orange  
Flashes during boot up  
WAN Port  
Link  
green  
Indicates proper a connection with the  
Internet Ethernet connection.  
Activity  
LAN Ports  
orange  
Flashing LED indicates that data packets are  
flowing through the WAN port.  
Link/ACT green  
Solid LED indicates a proper connection with  
a computer and flashing LED indicates that  
there are packets flowing through this  
Ethernet port  
Partition  
red  
Indicates that there is severe collision at this  
port and being isolated from the other ports  
temporarily.  
Collision yellow  
Indicates that a collision is happening  
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Hardware description  
Rear Panel Description  
LAN  
WAN  
Reset  
LAN Ethernet Ports - Four 10BASE-T Ethernet network (RJ-45)  
ports used for linking hub/computer in a Local Area Network to the  
XRouter.  
WAN Ethernet Port - One Wide Area Network port for connecting  
the XRouter to the Internet via a cable or DSL modem.  
Reset Button - Used for resetting the XRouter’s IP Address  
information and user password to the factory default settings.  
AC9V Power Adapter Receptacle - Plug the power adapter cable  
into this port to supply power to the XRouter unit.  
Uplink Switch - Used to determine the configuration of the  
XRouter’s LAN port No. 4. Choose either parallel (normal) for connect-  
ing LAN computers to the XRouter or crossover mode (uplink) for  
daisy-chaining a series of hubs to the XRouter.  
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Appendix C  
APPENDIX C - Glossary  
DHCP  
DHCP is a protocol for automatic IP configuration. Client side  
computer can get one IP from DHCP server automatically. Using  
DHCP can save the effort of setting IP for every LAN computers.  
Domain Name  
A name that identifies one or more IP addresses. For exam-  
ple, the domain name "microsoft.com" represents many IP addresses.  
Domain names are used in URLs to identify particular Web pages. For  
domain name is pcwebopedia.com.  
IEEE  
Abbreviation of Institute of Electrical and Electronics  
Engineers, pronounced "I-triple-E". Founded in 1884, the IEEE is an  
organization composed of engineers, scientists, and students. The  
IEEE is best known for developing standards for the computer and  
electronics industry. In particular, the IEEE 802 standards for local  
area networks are widely adopted.  
Internet  
A global network connecting millions computers. As of 1998,  
the Internet has more than 100 million users worldwide, and that  
number is growing rapidly. More than 100 countries are linked into  
exchanges of data, news and opinions.  
IP Address  
An identifier for a computer or device on a TCP/IP network.  
Networks using the TCP/IP protocol route messages based on the IP  
address of the destination. The format of an IP address is a 32-bit  
numeric address written as four numbers separated by periods. Each  
number's range is from 0 to 255. For example, 1.160.10.240 could be  
a legal IP address.  
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Appendix C  
ISP  
Short for Internet Service Provider, a company that provides  
access to the Internet. For a monthly fee, the service provider gives  
you a software package, username, password and access phone  
number. Equipped with a modem, you can then log on to the Internet  
and browse the World Wide Web and USENET, and send and receive  
e-mail.  
Local Area Network (LAN)  
A computer network that spans a relatively small area. Most  
LANs are confined to a single building or group of buildings. However,  
one LAN can be connected to other LANs over any distance via  
telephone lines and radio waves. A system of LANs connected in this  
way is called a wide-area network (WAN)  
MAC Address  
Short for Media Access Control address, a hardware address  
that uniquely identifies each node of a network. In IEEE 802 networks,  
the Data Link Control (DLC) layer of the OSI Reference Model is  
divided into two sublayers: the Logical Link Control (LLC) layer and the  
Media Access Control (MAC) layer. The MAC layer communicate  
directly with the network media. Consequently, each different type of  
network media requires a different MAC layer.  
TCP/IP  
Acronym for Transmission Control Protocol/Internet Protocol,  
the suite of communications protocols used to connect hosts on the  
Internet.  
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