DOCUMENT:Q127881 08-AUG-2001 [winnt] TITLE :Modem Fails to Disconnect After Selecting Hang Up in RASPHONE PRODUCT :Microsoft Windows NT PROD/VER:3.1 3.5 4.0 OPER/SYS: KEYWORDS:kbnetwork ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 3.1 - Microsoft Windows NT Workstation version 3.1 - Microsoft Windows NT Advanced Server, version 3.1 - Microsoft Windows NT Workstation versions 3.5, 4.0 - Microsoft Windows NT Server versions 3.5, 4.0 ------------------------------------------------------------------------------- SUMMARY ======= Your modem may fail to disconnect from a remote modem when you choose the Hang Up button in Windows NT Remote Access (RASPHONE.EXE). RASPHONE acts as if the connection is broken, however, your modem is still connected to the remote modem. When you select the Hang Up button in RASPHONE, Remote Access Service (RAS) drops Data Terminal Ready (DTR) to force the modem to disconnect from the remote modem. MORE INFORMATION ================ If your modem is not disconnecting from the remote modem after you select the Hang Up button in RASPHONE: 1. Check your modem cable if your are using an external modem. - Verify that your RS-232 modem cable includes a DTR pin. - Many 9-to-25 pin converters do not carry modem signals (including DTR). - Try using a different cable that you know is working correctly with RAS. - See the RAS help file (RASPHONE.HLP) for additional information on cable requirements for RAS. 2. Verify that RAS is setting your modem to use normal DTR operations. Most modems use the &D2 command to set the modem for normal DTR operations. To determine if normal DTR operations are being set properly for your modem, check the COMMAND_INIT string in it's corresponding section of the Windows NT MODEM.INF file. See the RAS help file for additional information on viewing and modifying the MODEM.INF file. 3. Confirm that your modem is not configured to ignore DTR. Some modems include a dip switch or jumper that allows you to configure the modem to ignore DTR. Check your modem documentation for information on how to configure your modem to use normal DTR operations or ignore DTR. 4. Add the following setting to the COMMAND_INIT string for your modem in the MODEM.INF file: S25=3. S25 controls the duration of time (in hundredths of a second) that DTR must be dropped before the modem disconnects itself from the remote modem. Setting this value to 3 will ensure that the modem disconnects almost immediately after choosing the Hang Up button in RASPHONE. Additional query words: prodnt ====================================================================== Keywords : kbnetwork Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT350search kbWinNT400search kbWinNTW350 kbWinNTW350search kbWinNTW310 kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS350 kbWinNTS310 kbWinNTAdvSerSearch kbWinNTAdvServ310 kbWinNTS350search kbWinNTS310search kbWinNT310Search kbWinNTW310Search Version : 3.1 3.5 4.0 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.