DOCUMENT:Q84279 19-SEP-1999 [win95x] TITLE :Testing Communications from MS-DOS PRODUCT :Microsoft Windows 95.x Retail Product PROD/VER:WINDOWS:3.0,3.0a,3.1,3.11 OPER/SYS: KEYWORDS: ====================================================================== 3.00 3.00a 3.10 3.11 WINDOWS kbtshoot kbtlc ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows versions 3.0, 3.0a, 3.1, 3.11 ------------------------------------------------------------------------------- SUMMARY ======= When you troubleshoot communications problems in Windows, an MS-DOS-level communications program is often required to test the modem and ports outside of Windows. If an MS-DOS-based application cannot be used, it is possible to test the modem connections by typing the following command at the MS-DOS command prompt Echo ATDT > ComX where X is the number of the serial port the modem is connected to or emulating. The modem should respond with a dial-tone or just a communication signal. MORE INFORMATION ================ The ATDT command is a signal to the modem that is interpreted as Attention Dial Tone. The first command, Attention, signals to the modem that it is about to receive information, and the Dial Tone command instructs the modem to enable a line to dial out. NOTE: The modem may not always give a dial tone with this test procedure because a number does not follow the command; however, the modem should give some kind of signal that information was received. Additional query words: 3.00 3.00a 3.10 3.11 COM1 COM2 COM3 COM4 AT DT dos tshoot ====================================================================== Keywords : Technology : kbWin3xSearch kbZNotKeyword3 kbWin300 kbWin300a kbWin310 kbWin311 Version : WINDOWS:3.0,3.0a,3.1,3.11 ============================================================================= 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 1999.