3Com 3C892A US - OfficeConnect ISDN Lan Modem Router Manuale introduttivo - Pagina 7
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N
W
OTE FOR
If you are already using Dial-Up Networking for remote connections, you may have to make the following changes to
your Internet connection parameters:
1
From the Start menu, select Settings, and then Control Panel. Double-click the Internet icon.
2
Click the Connection tab, and clear the check box labeled Connect to the Internet as needed. (If this option is
not available, choose Connect to the Internet using a local area network instead.) Click OK.
This allows outgoing connections to run through your ISDN LAN Modem each time you launch your Web
browser, bypassing the Dial-Up Connection window.
If you want to use Dial-Up Networking again — for example, to use another modem connected to your
computer's serial port when you are not using the ISDN LAN Modem — remember to switch back to the setting,
Connect to the Internet as needed.
C
HECKING FOR
Your ISDN LAN Modem is optimized for use with dynamic, rather than static, IP addressing. In static IP addressing, a
permanent IP address is manually assigned to each device on a network. In dynamic IP addressing, an IP address is
temporarily assigned for the duration of a network "session" and then returned to a pool of addresses for reuse. By
default, the ISDN LAN Modem assigns IP addresses dynamically to each attached computer.
For most users setting up a LAN for shared Internet access (regardless of whether you are connecting to the Internet for
the first time or have already been dialing in through an individual connection), it is most likely that your computer or
computers are set up for dynamic IP addressing. To verify that your computer or computers are set up for dynamic IP
addressing, follow the steps for your platform:
Windows 98, 95 and NT 4.0
From the Start menu, select Settings, and then
1
Control Panel. Double-click the Network icon.
Windows 98, 95: Select TCP/IP for the Ethernet
2
card associated with your ISDN LAN Modem.
Windows NT: Select Protocols; and then TCP/IP.
3
Click Properties.
Click the IP Address tab.
4
If Obtain an IP address automatically (Windows
98, 95) or Obtain an IP address from a DHCP
server (Windows NT 4.0) is selected, your
computer has a dynamic IP address.
If Specify an IP address is selected, your computer
has a static IP address.
5
Click Cancel to exit the TCP/IP Properties window,
and then Cancel to exit the Network window.
Where to Go from Here . . .
If you are set up for dynamic IP addressing, you are ready to continue directly with "Before You Begin," page 2.
If you are set up for static IP addressing, refer to Chapters 3 and then 5 of the User Guide (located on the
OfficeConnect ISDN LAN Modem Companion Programs CD-ROM) for your installation and configuration. You may
have to perform additional steps not covered in this guide.
D
INDOWS
IAL
D
YNAMIC VS
-U
N
P
ETWORKING
. S
IP A
TATIC
Macintosh
From the Apple menu, select Control Panels.
1
2
Double-click TCP/IP.
Select Ethernet from the Connect Via pop-up
3
menu, if it is not already chosen.
If the Configure pop-up menu is set to Using
DHCP Server, your computer has a dynamic IP
address.
If Configure is not set to Using DHCP Server and
you have specific values listed in any of the
following fields: IP Address, Subnet mask, Router
address, or Name server addr., your computer has
a static IP address.
4
Select File and Close to exit the TCP/IP Control
Panel.
7
U
SERS
DDRESSING