📄 58-nullmodem9-25.htm
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<title>串行直连电缆 9针-25针(NullModem)</title>
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<p align="center"><font size="5" color="#0000FF"><strong><u>串行直连电缆 9针-25针(NullModem)</u></strong></font></p>
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<td width="100%" align="center" height="26" bgcolor="#FFC8AA"><font color="#000080">[ <a target="_self" href="hardware.htm" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware.htm">返回目录</a> ]</font></td>
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<p><font color="#008080">串行直连电缆用于两台计算机的直接相连，电缆两端的插头一头是
9 针母插头，另一头是 25 针母插头：</font></p>
<p><img src="conn_dsub9f.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/conn_dsub9f.gif" alt="9 PIN D-SUB FEMALE" WIDTH="84" HEIGHT="65"><img src="conn_dsub25f.gif" tppabs="http://linux.ustc.edu.cn/~xjiang/hardware/images/conn_dsub25f.gif" alt="25 PIN D-SUB FEMALE" WIDTH="171" HEIGHT="65"><br>
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<td width="100%" align="center" height="24" bgcolor="#C8C8FF"><font color="#000080">引脚定义</font></td>
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<th bgcolor="#0000FF"> </th>
<th bgcolor="#0000FF"><font color="#FFFF00">D-Sub 9</font></th>
<th bgcolor="#0000FF"><font color="#FFFF00">D-Sub 25</font></th>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Receive Data</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">2</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">2</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Transmit Data</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Transmit Data</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">3</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">3</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Receive Data</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Data Terminal Ready</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">4</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">6+8</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Data Set Ready + Carrier Detect</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">System Ground</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">5</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">7</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">System Ground</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Data Set Ready + Carrier Detect</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">6+1</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">20</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Data Terminal Ready</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Request to Send</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">7</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">5</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Clear to Send</font></td>
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<td bgcolor="#C8C8FF"><font color="#0000FF">Clear to Send</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">8</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">4</font></td>
<td bgcolor="#C8C8FF"><font color="#0000FF">Request to Send</font></td>
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