3Com 3C892 - OfficeConnect ISDN Lan Modem Router User instructions

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This note describes how to configure the ISDN LAN modem on a static
network. If you have not determined whether your network is static, refer to
the
Getting Started Guide.
Installing the ISDN
LAN Modem
If you have not already installed the ISDN LAN modem, refer to the diagram
while following the steps.
Before you begin, power down the computer you will connect to your ISDN
LAN modem.
1 Insert one end of the Ethernet cable into a 10BASE-T LAN port and then
connect the opposite end of the Ethernet cable to your computer’s Ethernet
port.
Caution:
Only connect one computer to the ISDN LAN modem until after
you have finished the configuration process. After configuration, you can
connect any additional computers and/or printers which you would like to
add to your LAN. Also, do not connect the ISDN LAN modem to an existing
LAN.
2 Connect the RJ-45 (8-pin) connector end of the RJ-45/RJ-11cable labeled
ISDN to the port labeled ISDN and then connect the other end to the RJ-11
ISDN wall jack.
3 If you are connecting analog equipment, connect one end of an RJ-11 cable
(provided with your analog device) into one of the RJ-11 modular jacks
RESET ISDN
1 PHONE 2
10-18 VDC
0• 8A MAX
1
3
4
2
4 3 LAN 2 1

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labeled Phone and then connect the other end of the RJ-11 connector into
the appropriate RJ-11 port on the analog device.
4 Connect the power cable from the wall power module into the back panel
of the ISDN LAN modem and then plug the other end into a
110 VAC outlet. Use of a surge-protected outlet strip is recommended.
The Power LED illuminates. The indicator LEDs on the front panel flash
momentarily as the unit undergoes a power-up self-test diagnostic. The ISDN
LED flashes.
5 Turn on your computer which is connected to the ISDN LAN modem.
6 Once your computer is started, the LAN Status LED will flash and then
illuminate green, indicating that the port to which your computer is
connected is ready for use and that proper communication between your
computer and the ISDN LAN modem has been established.
This completes the installation process. Refer to “Setting Up TCP/IP for
Windows and Macintosh” to continue.
Setting Up TCP/IP for
Windows and
Macintosh
This chapter describes how to setup the Windows and Macintosh operating
system (OS) TCP/IP stack. Your computer must have a TCP/IP stack in order to
use the ISDN LAN modem. If you already have TCP/IP installed and set up on
your computer, then go on to “Configuring the ISDN LAN Modem”. These
instructions vary depending upon which operating system you are using. Refer
to the appropriate section.
■
TCP/IP Setup Using Windows 95
■
TCP/IP Setup Using Windows NT 4.0
■
TCP/IP Setup Using Mac OS 7.6 or later
■
TCP/IP Setup Using Windows 3.11
TCP/IP Setup Using
Windows 95
Windows 95 provides TCP/IP as part of its standard operating system. To set up
TCP/IP for the ISDN LAN modem, do the following.
You may be prompted for your Windows 95 installation disks or CD-ROM.
1 From the Control Panel, double click Network .
The Network dialog box appears.
2 Click Add .
The Select Network Component Type dialog box appears.
Figure 1 Select Network Component Type Dialog Box

Setting Up TCP/IP for Windows and Macintosh 3
3 Select Protocol and then click Add .
The Select Network Protocol dialog box appears.
Figure 2 Select Network Protocol Dialog Box
4 From the Manufacturers list box, select Microsoft , and then from the Network
Protocols list box, select
TCP/IP .
5 Click OK .
6 From the Network Configuration list box, select TCP/IP and then click Properties .
Figure 3 Network Dialog Box
7 Select IP Address .
The IP Address dialog box appears.
8 For static IP addresses, Specify an IP Address should be selected and an IP
address and subnet mask for your computer should be entered. (You can obtain
this information from your system administrator or ISP.)
9 Select Advanced and then check the box to set TCP/IP as the default protocol.

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10 Click OK to close the TCP/IP Properties dialog box.
11 Click OK to close the Network dialog box.
Figure 4 Advanced Parameters of TCP/IP Properties
12 Restart Windows 95 to let these changes take effect.
TCP/IP Setup Using
Windows NT 4.0
Windows NT 4.0 provides TCP/IP as part of its standard operating system. If you
have not already set up TCP/IP, do the following.
You will need your Windows NT 4.0 installation CD-ROM.
1 From the Control Panel, double click Network .
The Network dialog box appears.
2 Select the Protocols tab, as shown in Figure 5.

Setting Up TCP/IP for Windows and Macintosh 5
Figure 5 Windows NT Protocols Configuration Window
3 Click Add .
The Select Network Protocol window appears as shown in Figure 6.
Figure 6 Select Network Protocol Window
4 Select TCP/IP Protocol and then click OK .
The following message appears.
Figure 7 DHCP Message Box
5 Select No .

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6 You are then prompted to insert your installation CD-ROM. Insert the Windows
NT 4.0 CD ROM and then click Continue.
If you have Remote Access Service (RAS) installed on your PC after the
appropriate files are copied to your PC, a message box asks whether or not you
would like TCP/IP installed for RAS. If you select Yes, you must select the device
you want to access remotely and then click Close.
7After the appropriate files are copied to your PC, you will see TCP/IP Protocol
listed in the Network Protocols group box, as shown in Figure 8.
Figure 8 Network Protocols Window
8Click Close.
The Microsoft TCP/IP Properties window appears.
9From the Adapter drop down list box, select the Ethernet card that is connected
to the ISDN LAN modem.
10 For static IP addresses, Specify an IP Address should be selected and an IP
address and subnet mask for your computer should be entered. (You can obtain
this information from your system administrator or ISP.)
11 Click OK.
12 Click Yes to restart your PC and allow the changes to take effect.
TCP/IP Setup Using
Windows 3.11 If you are using Windows 3.11, a TCP/IP stack is not provided as part of the operating system. If you do not have a TCP/IP stack, you can use MS _TCP
which is provided on the 3Com Companion Programs CD-ROM.
Setting up TCP/IP Using MS TCP
To set up MS_TCP, do the following.
1Install MS_TCP, located on the 3Com Companion Programs CD-ROM, onto your
hard drive.

Setting Up TCP/IP for Windows and Macintosh 7
2From the Program manager, click Network.
3From the Network group box, click Network Setup.
Figure 9 Network Group Box
4From the Network Setup dialog box, click the Drivers button.
5From the Network Drivers dialog box, click Add Protocol.
6Select Unlisted or Update Protocol and then click OK.
7From the Install Driver dialog box, enter the path to the MS_TCP directory.
For example, if you installed MS TCP on your C: drive in a directory called
MSTCP, you would enter C:\MSTCP.
8Select MS TCP/IP-32.X and then click OK to install.
9After the installation is complete, click Close.
10 Click OK.
11 From the MS TCP/IP Configuration dialog box, check the Auto Configuration
check box and then click OK.
12 Restart your PC to allow the changes to take effect.

8SETTING UPTHE ISDN LAN MODEM ONA STATIC NETWORK
Configuring the ISDN
LAN Modem This section describes how to configure the ISDN LAN modem for the typical
configuration. The typical configuration provides the basic set up and it includes
what most users need to get up and running. It provides instructions for setting
up your ISDN line and connecting to the Internet for a static network.
Before You Begin Before you configure the ISDN LAN modem, you should have already done the
following:
■Installed the hardware as described in “Installing the ISDN LAN Modem”.
■Installed and set up TCP/IP up on all computers you intend to connect to the
ISDN LAN modem. If TCP/IP is not installed and set up, refer to “Setting Up
TCP/IP for Windows and Macintosh”.
CAUTION: You should only have one computer physically connected to the
ISDN LAN modem during configuration. Once you complete the configuration
process, connect any other computers you would like to have on the LAN.
■Telephone number(s) for your ISDN line provided by your telephone
company.
■If you want to set up a connection to an ISP, you will also need the
telephone number to call for access to your ISP, as well as your user name,
password and DNS address (if your service provider requires a DNS address to
be configured).
Setting Up Your
Computer Because your computer has a static IP address, you must verify and possibly change some settings on your computer before you begin the configuration
procedure. The ISDN LAN modem must be your gateway to get outside of your
LAN and one of your DNS servers. Follow the procedure in the appropriate
section to make sure that this is the case.
For Windows 95 Users
1From the Start menu, select Settings and then Control Panel.
2Double-click Network and then select TCP/IP.
If you have multiple TCP/IP entries, select TCP/IP for the Ethernet card associated
with the ISDN LAN modem.
3Click Properties and then select the Gateway tab and write down the first IP
address in the Installed Gateways list.
4Click on the DNS Configuration tab.
5In the DNS Server Search Order edit box, enter the Gateway IP address you
wrote down as part of the previous step and then click Add.
6Click OK to close the TCP/IP Properties box.
7Click OK to close the Network control panel.
You are asked to restart your computer.
8Click OK.

Configuring the ISDN LAN Modem 9
For Windows NT 4.0 Users
1From the Start menu, select Settings and then Control Panel.
2Double-click Network and then select the Protocols tab.
3Highlight TCP/IP and then click Properties,
4Click the IP Address tab and then select the Ethernet card associated with the
ISDN LAN modem from the Adapter drop down list box.
5Write down the IP address in the Installed Gateways box.
6Click on the DNS tab.
7Click Add.
8In the TCP/IP DNS Server box, enter the Gateway IP address you wrote down as
part of the previous step and then click Add.
9Click OK to close the Microsoft TCP/IP Properties dialog box.
10 Click OK to close the Network Control Panel box.
You are asked to restart your computer.
11 Click OK.
For Macintosh Users
1From the Apple menu, open Control Panels. Double-click TCP/IP.
2Choose Ethernet from the Connect Via pop-up menu, if not already chosen.
The Configure drop-down list box should be set to Manually if you are on a
Static network.
3Note the series of numbers entered in the Router address box. Write this
number down.
4Enter this number into the Name server addr. Box.
If you already have existing address(es) listed, add the new address below the
last entry.
5Choose File and Close.
6When asked to save your changes, do so by choosing Save.
You may want to rename this configuration so that your previous configuration
is not overwritten.
For Windows 3.11 Users
1From the Program Manager, double click the Network program group icon.
2Double click the Network Setup icon.
3Click the Drivers button.
4Highlight the Microsoft TCP/IP - 32.X entry and click Setup.
5Note the Default Gateway address. Write this number down.
6Click the DNS tab.
7Enter the Default Gateway address from the previous step into the Domain
Name Service (DNS) Search Order box and click Add.
8Click OK to close the Microsoft TCP/IP Connectivity Configuration screen.

10 SETTING UPTHE ISDN LAN MODEM ONA STATIC NETWORK
9Click OK to close the Microsoft TCP/IP Configuration screen.
10 Close the Network Drivers window.
11 Click OK to close the Network Setup window.
You will be asked to restart your computer.
12 Click OK to do so.
You are now ready to configure your ISDN LAN modem. Refer to “Configuring
the ISDN LAN Modem for the Typical Configuration” to continue.
Configuring the ISDN
LAN Modem for the
Typical Configuration
To configure the ISDN LAN modem for the typical configuration, do the
following. You may need the IP address which you recorded previously in the
“Setting Up Your Computer”section.
1Launch your Web browser.
The ISDN LAN modem attempts to use its default IP address to communicate
with the computer. If communication cannot be established, the ISDN LAN
modem will change its default IP address. If this occurs, the ISDN LAN modem
will reset itself and then function as described in this section.
Regardless of the start page to which your Web browser is set, your Web
browser will go to the ISDN LAN modem configuration set up.
A welcome message appears, as shown in Figure 10.
Figure 10 Initial Set Up Welcome Window
2Click Continue.