192 lines
4.4 KiB
HTML
192 lines
4.4 KiB
HTML
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<HTML
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><HEAD
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><TITLE
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>A Serial NULL Modem Cable</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.57"><LINK
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REL="HOME"
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TITLE="Linux Network Administrators Guide"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Useful Cable Configurations"
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HREF="x-087-2-appendix.cables.html"><LINK
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REL="PREVIOUS"
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TITLE="A PLIP Parallel Cable"
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HREF="x-087-2-cable.plip.html"><LINK
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REL="NEXT"
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TITLE="Linux Network Administrator's Guide, Second Edition Copyright Information"
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HREF="x-087-2-appendix.gpl.html"></HEAD
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><BODY
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Linux Network Administrators Guide</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="x-087-2-cable.plip.html"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Appendix B. Useful Cable Configurations</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="x-087-2-appendix.gpl.html"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="X-087-2-CABLE.SERIAL"
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>B.2. A Serial NULL Modem Cable</A
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></H1
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><P
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>
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A serial null modem cable will work for both SLIP and PPP. Again, you
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will need two DB-25 connectors. This time your cable requires only
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eight conductors.</P
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><P
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>You may have seen other NULL modem cable designs, but this one allows you
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to use hardware flow control—which is far superior to XON/XOFF
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flow control—or none at all. The conductor configuration is
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shown in <A
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HREF="x-087-2-cable.serial.html#X-087-2-CABLE.NULLMODEM.DIAGRAM"
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>Figure B-2</A
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>:</P
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><P
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>Again, if you have a shield, you should connect it to the first pin at one
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end only.</P
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><DIV
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CLASS="FIGURE"
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><A
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NAME="X-087-2-CABLE.PLIP.DIAGRAM"
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></A
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><P
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><B
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>Figure B-1. Parallel PLIP cable</B
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></P
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><P
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><IMG
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SRC="lag2_ab01.jpg"></P
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></DIV
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><P
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>                                 
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                                  </P
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><DIV
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CLASS="FIGURE"
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><A
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NAME="X-087-2-CABLE.NULLMODEM.DIAGRAM"
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></A
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><P
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><B
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>Figure B-2. Serial NULL-Modem cable</B
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></P
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><P
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><IMG
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SRC="lag2_ab02.jpg"></P
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></DIV
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><P
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>                                 
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                                  </P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="x-087-2-cable.plip.html"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="x-087-2-appendix.gpl.html"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>A PLIP Parallel Cable</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="x-087-2-appendix.cables.html"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
|
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ALIGN="right"
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VALIGN="top"
|
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>Linux Network Administrator's Guide, Second Edition Copyright Information</TD
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></TR
|
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|
></TABLE
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></DIV
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></BODY
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></HTML
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>
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