During installation of the ISDN CAPI Port Device Driver, the virtual modems initially are installed with a default configuration. It is generally not necessary to change these default settings. If a change should become necessary, however, modem settings can be adapted to your needs using registry commands.
Such a configuration is essentially the same for all virtual modems. The general procedure is described below. The individual registry commands are listed in the corresponding sections as well as in Appendix A.
1.Click Start
2.Select the desired modem (Windows 2000: on the Modems page).
3.Click the Properties button.
4.Click the Advanced... button on the Connection page (Windows 2000: on the Advanced page).
5.Enter the registry command in the Extra Settings input field (Windows 2000: Extra initialization commands).
To enter multiple registry commands, separate commands with a semicolon and a space. Only the first command entered should begin with the characters AT.
Example: ATS31=2; S35=38400; S51=0
6.Confirm your entries by clicking OK and close the modem window.
Connections to internet service providers (ISPs)
There is no binding standard for ISDN
For TCP/IP connections using the ISDN CAPI Port Device Driver, you must also use
ISDN B-channel protocols and PPP variants
Many providers use the ”HDLC” or ”X.75” protocol on the ISDN B channel. Two protocol variants are used for PPP connections: "PPP over ISDN" in accordance with RFC 1618 (also known as synchronous PPP), and "PPP modem style" in accordance with RFC 1162 (also called asynchronous PPP.
Note: Please ask your Internet provider which combination of protocols and
authentication procedures are required for ISDN
13. ISDN CAPI Port Device Driver 195