4 ContentsChapter 5 — Operation ...............................................................31Making a connection ...................................................................31Windows 95.............................................................................32Windows NT 4.0.......................................................................34Windows NT 3.51.....................................................................37Windows 3.x ............................................................................39DOS ........................................................................................41Dialing with Multilink PPP .............................................................42About PPP authentication protocols ...........................................43Using other communications applications .....................................44Dialing with AT commands ........................................................44Data compression .......................................................................45Netopia ISDN PC Card LEDs.........................................................45Chapter 6 — Troubleshooting .....................................................47Solutions to common problems ....................................................50Appendix A —Technical Specifications........................................53Regulatory notices....................................................................56Appendix B —AT Commands.......................................................59AT command result codes............................................................62Technical Support.......................................................................63How to reach us..........................................................................63Warranty