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232 IBM ISDN PC Card:User’s Guide
3. You are using the correct Dial-Up Networking connection that configured for
use with with the PC Card.
4. Your ISP supports the appropriate protocols. The ISP might conceivably
recommend any protocol, such as V.120, asynchronous PPP, X.75, or any other
protocol. Contact your ISP and find out the protocol to use. Install cFos and
create a Dial-Up Networking connection according to the procedures in this
guide and your ISP's instructions.
No connection to your ISP at 128 kbit/s
If you suspect that the IBM International ISDN PC Card is only operating using
one ISDN B channel (64 kbit/s) although you have configured the system to use
both B channels, please verify the following:
1. Your ISP supports multilink connections, a 128 kbit/s connection over two
ISDN B channels simultaneously.
2. If you are using Windows 95, make sure you have installed the Microsoft Dial-
Up Networking Update 1.3. Various language versions are available on the
CD. Installation instructions can be found in Section “Upgrading Dial-Up
Networking for Windows 95” on page 18.
3. You have followed the instructions in Section “Setting Up Internet Access” on
page 106.
cFos was installed with all COM ports selected. Now my modem takes COM port
10 or higher. How can this be solved?
If you select all available COM ports during the cFos installation, then cFos will
occupy all COM ports, up to COM9. This might cause problems later when you
install an analog modem. There are two ways to circumvent this problem:
1. Try to use as few COM ports as possible. Three to four COM ports should be
enough for day-to-day use of cFos with the IBM International ISDN PC Card.
2. If possible, install the analog modem before you install the IBM International
ISDN PC Card and cFos.
3. If you have already installed the IBM International ISDN PC Card, then click
Start -> Programs -> cFos ISDN & DSL Driver and select Configure cFos. In
the cFos configuration program, select the menu command Configure COM
ports. In the list of available COM ports, deactivate the one you want to use
for your analog modem. Click OK, then Exit. When asked whether you want
to save the changes, click Yes. In the last window, click OK. Restart your
computer if necessary.
CAUTION:
When following the instructions above to make a certain COM port available
for your analog modem, make sure that the COM port you release is not
currently used by one of cFos's emulated modems. You can verify this by
clicking “Start / Settings / Control Panel / Modems”. Furthermore, make sure
that your Dial-Up Network connections are not using this COM port.
Windows 9x, Windows Me
ISDNmst.fm Page 232 Wednesday, January 15, 2003 9:22 AM