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12. Using NDIS 169
Solution: The remote site, i.e. your Internet Service Provider must also
support this standard.
• Fault condition: Multilink PPP connections are not possible.
Possible cause: Your Internet Service Provider (ISP) does not support
multilink PPP connections, or you have not configured the RAS server with a
second modem entry for incoming calls.
Solution: Use the same device driver at both ends of the connection, i.e. either
the ISDN CAPI Port device driver or the NDIS WAN device driver. Avoid
mixed operation of the two device drivers.
• Fault condition: The modem entries “NDIS WAN Line 1” and “Line 2” are not
displayed in Dial-Up Networking, or a message appears upon starting Dial-
Up Networking prompting you to install a modem.
Possible cause: You have not followed the installation sequence exactly (see
Section13.1.2).
Solution: Remove all components already installed (Dial-Up Networking,
NDIS WAN CAPI device driver) and begin the installation again with Dial-Up
Networking (see Section 13.1.2.2).
Using NDIS in Windows NT
The NDIS WAN CAPI Device Driver for Windows NT enables the use of Remote
Access Services (RAS) over ISDN. NDIS is an abbreviation for Network Device
Interface Specification, and represents a standard for binding network adapters
(hardware) to network protocols (software). NDIS WAN is a Microsoft extension
of this standard for Wide Area Networking (WAN). The NDIS WAN CAPI Device
Driver for Windows NT thus allows the ISDN adapter to be used as a WAN
adapter, addressed through the Common ISDN API (CAPI) 2.0 applications
interface.
Please install the software according to these instructions. You should also refer to
the Windows NT documentation pertaining to Remote Access Services (RAS).
Installation
You will need system administrator access privileges to install the NDIS WAN
CAPI Device Driver for Windows NT.
Copy the NDIS WAN CAPI Device Driver software onto a floppy disk and label it
accordingly.
The following components are necessary to use RAS services over ISDN:
• A computer with the Windows NT 4.0 operating system
• A fully installed ISDN adapter with CAPI 2.0 device driver (see the
installation instructions in the ISDN adapter manual)
• A diskette (or CD) with the NDIS WAN CAPI Device Driver for Windows NT
The exact procedure for installing the NDIS WAN CAPI Device Driver depends
on the network components already installed on your computer. To illustrate
ISDNmst.fm Page 169 Wednesday, January 15, 2003 9:22 AM