DOCUMENT:Q108296  08-AUG-2001  [winnt]
TITLE   :9-to-25 Pin RAS Null Modem Cabling
PRODUCT :Microsoft Windows NT
PROD/VER:3.1 4.0
OPER/SYS:
KEYWORDS:kbnetwork

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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 Server version 4.0 
 - Microsoft Windows NT Workstation version 4.0 
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SUMMARY
=======

The Windows NT Remote Access Help file includes tables showing the correct
wiring of a null modem cable for use with RAS. The two tables included show the
correct wiring for a 9-pin null modem cable and a 25-pin null modem cable. The
following table contains the proper null modem wiring that must be used when the
cable connects a 9-pin serial port to a 25-pin serial port.

   25-pin Connector       to    9-pin Connector
   ----------------------------------------------------
   2 (transmit data)      <->   2 (receive data)
   3 (receive data)       <->   3 (transmit data)
   4 (request to send)    <->   8 (clear to send)
   5 (clear to send)      <->   7 (request to send)
   6,8 (data send ready,
        carrier detect)   <->   4 (data terminal ready)
   7 (ground)             <->   5 (ground)
   20 (data terminal
       ready)             <->   6,1 (data send ready,
                                      carrier detect)

Additional query words: prodnt nul

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Keywords          : kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTW310 kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS310 kbWinNTAdvSerSearch kbWinNTAdvServ310 kbWinNTS310search kbWinNT310Search kbWinNTW310Search
Version           : 3.1 4.0

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