[MSDN Library June 1998] ISDN Notes (29.2949697361462%)

MSDN Library Visual Studio 6.0 > Windows Resource Kits > Windows NT Server 4.0 Resource Kit > Windows NT Server Networking Guide > Appendix E - RAS Reference > RAS Communication Quick Reference

[MSDN Library June 1998] ISDN Requirements (26.9381598793363%)

MSDN Library Visual Studio 6.0 > Books > PC 98 System Design Guide > Part 4: Device Design Guidelines > Chapter 20

[MSDN Library June 1998] ISDN Modem Requirements (24.8674503246114%)

MSDN Library Visual Studio 6.0 > Books > PC 98 System Design Guide > Part 4: Device Design Guidelines > Chapter 19 > Modem Basic Features

[MSDN Library June 1998] ISDN Hardware (22.4343711843712%)

MSDN Library Visual Studio 6.0 > Windows Resource Kits > Windows NT Server 4.0 Resource Kit > Windows NT Server Resource Kit - Supplement 1 > Chapter 4 - Using ISDN > Introduction to ISDN

[MSDN Library June 1998] ISDN Subaddresses (20.2407886231416%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Telephony Application Programming Interface (TAPI) > TAPI Version 2.1 > Overviews > Line Devices Overview