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Chapter 4 - Troubleshooting
MT128ISA/PCI
Q: Why does the Internet connection not work when I upgrade to V2.13 or later?
A: When you upgrade to V2.13, youll need to remove the existing virtual modems and read them
into the system. You can add the virtual modems using the following steps:
1. Start>Settings>Control Panel>Modem>Add>Select Dont detect my modem, I will
select it from a list. Next>Select the modem and click Have Disk. Browse to the location
of the installation diskette and select MDMASU.INF. Click OK> select the ISDN Universal-
1 Modem, Next> associate this modem to ISDN COM port 1.
2. Use the previous step to select the ISDN Universal-2 Modem > associate this second
modem to ISDNCOMport2.
Note: You may also use the Async to Sync PPP modem or the X.75 transparent modem Youll also
find these files in the modem sub-directory of the installation disk.
Q: Why cant I see the correct characters in the HyperTerminal screen when I get a connection
with a remote site?
A: Check to make sure the B channel protocol is the same on both sides of the connection.
Check that the character is 8-bit ASCII or 7-bit ASCII. You can disable the first bit of 8-bit
ASCII to 7-bit ASCII by opening the HyperTerminal settings and changing the terminal type to
VT100. Click the ASCII Setup. In the ASCII receiving section, select Force incoming data to
7-bits ASCII. Click OK.
Q: Why cant I see the ISDN ports in RAS after installing the ISDN driver in WinNT?
A: Follow these steps:
1. Remove the ISDN card via Start>Settings>Control Panel>Network, ISDN card, Re-
move.
2. Reboot the computer.
3. Install the ISDN driver.
4. Redefine the modems to RAS. The two ISDN ports will appear.
Q: How can I set the phone number for outgoing calls and MSN checking for incoming calls using
the NDISWAN interface in WinNT?
A: In WinNT, set MSN1, MSN2, calling party 1, and calling party 2 for the two NDISWAN ports by
using Start>Settings>Control Panel>Network>IINWANNT ISDN
Adapter>Properties>NDISWAN setting. Enter the subaddress information if applicable for
your ISDN switch, otherwise, leave these fields blank.
In most installations, the phone number for outgoing calls is used for billing. MSN is used to
screen and accept preferred incoming calls.
Q: Why does Windows NT detect the ISDN card and request to install its drivers when Windows
NT boots up?
A: Windows NT is not a PnP operating system. If Windows NT detects a PnP card during start
up, the operating system has previously installed ISAPNP (this is commonly installed with
sound cards such as SB16 or AWE32). When Windows NT requests ISDN driver installation,
check Do not install a driver and NT will not prompt you again at boot up. Follow the NT
installation instructions in this User Guide to install the NT drivers.
Q: Why doesnt Windows NT RAS detect the ISDN Driver?
A: If RAS is not installed on your computer and you install the ISDN driver, you will be presented
with a prompt asking if you would like to install RAS. Respond Yes and install RAS before
rebooting your computer. If RAS still does not recognize your adapter, remove the ISDN
driver and try reinstalling it. If RAS is still unable to detect the ISDN driver, contact Technical
Support for assistance (see Chapter 5).