NS.RIF.10629C41 del 17/07/96 Cables That Are Compatible with Direct Cable Connection Article ID: Q142324 Revision Date: 06-MAY-1996 The information in this article applies to: - Microsoft Windows 95 SUMMARY You can use the Direct Cable Connection tool to establish a direct serial or parallel cable connection between two computers. Windows 95 supports serial null-modem standard (RS-232) cables and the following parallel cables for use with Direct Cable Connection: - Standard or Basic 4-bit cables - Extended Capabilities Port (ECP) cables - Universal Cable Module (UCM) cables Parallel cable connections are faster than serial cable connections. Use a serial cable with Direct Cable Connection only if a parallel port or cable is unavailable. MORE INFORMATION ECP cables work on computers with ECP-enabled parallel ports. ECP must be enabled in your computer's CMOS settings for parallel ports that support this feature. ECP cables allow data to be transferred more quickly than standard cables. UCM cables support connecting different types of parallel ports. Using a UCM cable between two ECP-enabled ports allows the fastest possible data transfer between two computers. Pin Connections for a Serial Cable This section describes the wiring specifications for serial InterLink cables that can be used with Direct Cable Connection. To make a serial InterLink cable, make a serial cable with either a 9-pin or 25-pin female connector on both ends, and wire the cable as follows: 9-pin 25-pin 25-pin 9-pin Description -------------- --------------------------------- pin 5 pin 7 <------> pin 7 pin 5 Ground-Ground pin 3 pin 2 <------> pin 3 pin 2 Transmit-Receive pin 7 pin 4 <------> pin 5 pin 8 RTS-CTS pin 6 pin 6 <------> pin 20 pin 4 DSR-DTR pin 2 pin 3 <------> pin 2 pin 3 Receive-Transmit pin 8 pin 5 <------> pin 4 pin 7 CTS-RTS pin 4 pin 20 <------> pin 6 pin 6 DTR-DSR The Ground (GRD) line is the reference signal ground for all other lines. The Transmit Data (TD) line is used for sending data. The Receive Data (RD) line is used for receiving data. The RTS (Request To Send) line is used by the data terminal equipment (DTE) to indicate that it is ready to send data. The CTS (Clear To Send) line is used by the data communications equipment (DCE) to indicate that it is ready to receive data. The DSR (Data Set Ready) line is used by the DCE to indicate that it is ready to communicate. The DTR (Data Terminal Ready) line is used by the DTE to indicate that the DCE should initiate communication. Pin Connections for a Parallel Cable This section describes the wiring specifications for parallel InterLink cables that can be used with Direct Cable Connection. To make a parallel InterLink cable, make a parallel cable with male DB-25 connectors at both ends, and wire the cable as follows: 25-pin 25-pin Description ------ -------------------- pin 2 <------> pin 15 N/A pin 3 <------> pin 13 N/A pin 4 <------> pin 12 N/A pin 5 <------> pin 10 N/A pin 6 <------> pin 11 N/A pin 15 <------> pin 2 N/A pin 13 <------> pin 3 N/A pin 12 <------> pin 4 N/A pin 10 <------> pin 5 N/A pin 11 <------> pin 6 N/A pin 25 <------> pin 25 Ground-Ground KBCategory: kbtool kbenv KBSubcategory: win95 Additional reference words: 95 dcc 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 1996.