content.htm

来自「ccna」· HTM 代码 · 共 78 行

HTM
78 行
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<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Content</title>
<base target="contents">
</head>

<body>

<table border="0" width="650" cellspacing="0" cellpadding="0">
  <tr>
    <td colspan="2">
      <table border="0" width="100%" cellspacing="0" cellpadding="0">
        <tr>
          <td width="90%"><font face="Arial" size="3"><font color="#008080"><b><img border="0" src="../../images/arrow_down.gif" width="19" height="12"></b></font></font><b><font size="3" face="Arial" color="#008080">Recognized
            backbone twisted-pair cables</font></b> <font color="#CCCC00"><b><font face="Arial" size="3">::</font></b></font></td>
          <td width="10%">
            <p align="right"><font face="Arial" size="3" color="#008080"><b>7/55</b></font></td>
        </tr>
      </table>
    </td>
  </tr>
  <tr>
    <td colspan="2">
      <img border="0" src="../../images/transdot.gif" width="1" height="15"></td>
  </tr>
  <tr>
    <td><img border="0" src="../../images/transdot.gif" width="45" height="1"></td>
    <td><font size="2" face="Arial">Since backbone cabling supports a wide range
      of telecommunications services and site sizes, several transmission media
      types are recognized for use.</font>
      <p><b><font size="2" face="Arial">Requirements</font></b></p>
      <p><font size="2" face="Arial">Recognized media include:</font></p>
      <ol type="a">
        <li><font size="2" face="Arial">100 &#937; twisted-pair cable (ANSI/TIA/EIA-568-B.2)&nbsp;</font></li>
        <li><font size="2" face="Arial">multimode optical fiber cable, either
          62.5/125 碌m or 50/125 碌m (ANSI/TIA/EIA-568-B.3)&nbsp;</font></li>
        <li><font size="2" face="Arial">singlemode optical fiber cable (ANSI/TIA/EIA-568-B.3)</font></li>
      </ol>
      <p><font size="2" face="Arial">Recognized cables, associated connecting
      hardware, jumpers, patch cords, equipment cords, and work area cords shall
      meet all applicable requirements specified in ANSI/TIA/EIA-568-B.2 and
      ANSI/TIA/EIA-568-B.3.</font></p>
      <blockquote>
        <p><font face="Arial" size="1">NOTE 1 - Crosstalk between individual,
        unshielded twisted-pairs may affect the transmission performance of
        multipair copper cables. Annex B of ANSI/TIA/EIA-568-B.1 provides some
        shared sheath guidelines for multipair cables.</font></p>
        <p><font face="Arial" size="1">NOTE 2 - There are a number of other
        application specific backbone cable types that have been used in
        telecommunications. Although these cables are not part of the
        requirements of the ANSI/TIA/EIA-568-B.1, ANSI/TIA/EIA-568-B.2 and ANSI/TIA/EIA-568-B.3
        standards, they may be used in addition to the minimum requirements
        described above.</font></p>
      </blockquote>
      <p>&nbsp;</td>
  </tr>
  <tr>
    <td colspan="2">
      <table border="0" width="100%" cellspacing="0" cellpadding="0">
        <tr>
          <td width="90%"><img border="0" src="../../images/arrow_up.gif" width="19" height="12"><b><font size="3" face="Arial" color="#008080">Recognized
            backbone twisted-pair cables</font></b> <font face="Arial" size="3"><b><font color="#CCCC00">::</font></b></font></td>
          <td width="10%">
            <p align="right"><font face="Arial" size="3" color="#008080"><b>7/55</b></font></td>
        </tr>
      </table>
    </td>
  </tr>
</table>

</body>

</html>

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