[MSDN Library April 2000] PPTP Doesn't Work After ISDN Installation (79.0567446490791%)
MSDN Library - April 2000 > Windows Resource Kits > Windows NT Server 4.0 Resource Kit > Windows NT Server 4.0 Resource Kit - Supplement 2 > Troubleshooting PPTP on Microsoft Clients > Troubleshooting Your PPTP Connection