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| author | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
|---|---|---|
| committer | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
| commit | 33613a85afc4b1481367fbe92a17ee59c240250b (patch) | |
| tree | 670b842326116b376b505ec2263878912fca97e2 /Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/content.html | |
| download | Studium-master.tar.gz Studium-master.tar.bz2 | |
Diffstat (limited to 'Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/content.html')
| -rw-r--r-- | Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/content.html | 140 |
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diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/content.html b/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/content.html new file mode 100644 index 0000000..0950b32 --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/content.html @@ -0,0 +1,140 @@ +<html>
+
+<head>
+<meta http-equiv="Content-Language" content="en-us">
+<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
+
+
+
+<title>Content</title>
+<base target="_self">
+</head>
+
+<body background="../../images/bg.gif" topmargin="0" leftmargin="0" marginheight="0" marginwidth="0" onLoad="window.focus();" link="#808080" vlink="#808080" alink="#808080">
+
+<table border="0" cellpadding="0" cellspacing="0" width="100%">
+ <tr>
+ <td bgcolor="#336666" width="18" valign="top">
+ <img border="0" src="../../images/content_lines.gif" width="16" height="25">
+ <img border="0" src="../../images/transdot.gif" width="2" height="1"></td>
+ <td bgcolor="#336666"><b><font face="Arial" size="2" color="#FFFFFF">4</font></b><font face="Arial" size="2" color="#FFFFFF"><b>.1</b></font></td>
+ <td bgcolor="#336666"><img border="0" src="../../images/transdot.gif" width="10" height="1"></td>
+ <td bgcolor="#336666" width="100%"><strong>
+ <font face="Arial" size="2" color="#FFFFFF">ISDN Concepts</font></strong></td>
+ <td width="9" bgcolor="#336666"> </td>
+ </tr>
+ <tr>
+ <td bgcolor="#669999" height="25" width="18"> </td>
+ <td bgcolor="#669999" height="25"><b>
+ <font face="Arial" size="2" color="#FFFFFF">4.1.6</font></b></td>
+ <td bgcolor="#669999"><img border="0" src="../../images/transdot.gif" width="10" height="1"></td>
+ <td bgcolor="#669999" height="25" width="100%"><strong>
+ <font face="Arial" size="2" color="#FFFFFF">Determining the router ISDN
+ interface</font></strong></td>
+ <td bgcolor="#669999" height="25" width="9"> </td>
+ </tr></table>
+
+<table border="0" cellpadding="0" cellspacing="0" width="95%" bordercolor="#111111">
+ <tr>
+ <td width="15"></td>
+ <td>
+
+ <font face="Arial" size="2">In the United States, the customer is
+ required to provide the NT1. In Europe and various other countries,
+ the telephone company provides the NT1 function and presents an S/T
+ interface to the customer. In these configurations, the customer is
+ not required to supply a separate NT1 device or integrated NT1
+ function in the terminal device. Equipment such as router ISDN modules
+ and interfaces must be ordered accordingly.
+ <img border="0" src="../../images/1.gif" align="absmiddle" width="12" height="12"></font><p>
+
+ <font face="Arial" size="2">To select a Cisco router with the appropriate ISDN interface, do the
+ following:</p>
+ <ol>
+ <li>Determine whether the router supports ISDN BRI. Look on the back of
+ the router for a BRI connector or a BRI WAN Interface Card (WIC).</li>
+ <li>Determine the provider of the NT1. An NT1 terminates the local loop
+ to the central office (CO) of the ISDN service provider. In the United
+ States, the NT1 is Customer Premise Equipment (CPE), meaning that it
+ is the responsibility of the customer. In Europe, the service provider
+ typically supplies the NT1.
+
+ </li>
+ <li>If the NT1 is CPE, make sure the router has a U interface. If the
+ router has an S/T interface, then it will need an external NT1 to
+ connect to the ISDN provider.
+ <img border="0" src="../../images/2.gif" align="absmiddle" width="12" height="12"></font></li>
+ </ol>
+ <p>
+
+ <font face="Arial" size="2">If the router has a connector labeled BRI then it is already
+ ISDN-enabled. With a native ISDN interface already built in, the
+ router is a TE1. If the router has a U interface, it also has a
+ built-in NT1.
+ <img border="0" src="../../images/3.gif" align="absmiddle" width="12" height="12"></font></p>
+ <p>
+
+ <font face="Arial" size="2">If the router does not have a connector labeled BRI, and it is a
+ fixed-configuration, or non-modular router, then it must use an
+ existing serial interface. With non-native ISDN interfaces such as
+ serial interfaces, an external TA device must be
+ attached to the serial interface to provide BRI connectivity. If the
+ router is modular it may be possible to upgrade to a native ISDN
+ interface, providing it has an available slot.</font></p>
+ <blockquote>
+ <p>
+
+ <font face="Arial" size="2"><b>Caution: </b>A router with a U interface should never be connected to an
+ NT1 as it will damage the interface.</font></p>
+ </blockquote>
+ <p>
+ <TABLE bgcolor="#B0AFAF" width="95%" border="0" cellspacing="0" cellpadding="0">
+ <TR>
+ <TD valign="top">
+ <TABLE bgcolor="#669999" width="100%" cellspacing="0" cellpadding="0" border="0">
+ <TR>
+ <TD width="5">
+ <img border="0" src="../../images/lab_toplft.gif" width="116" height="23"></TD>
+ <TD><IMG alt="" height="1" width="3" src="../../images/s.gif"></TD><TD align="right" valign="top">
+ <IMG alt="" src="../../images/corner_ur_7.gif" width="7" height="7"></TD>
+ </TR>
+ </TABLE>
+
+ <TABLE bgcolor="#B0AFAF" width="100%" cellspacing="0" cellpadding="0" border="0">
+ <TR>
+ <TD>
+ <TABLE width="100%" cellpadding="2" cellspacing="0" border="0" bordercolor="#111111">
+ <TR>
+ <TD bgcolor="#ffffff" width="15"> </TD>
+ <TD bgcolor="#ffffff"><font FACE="Arial" SIZE="2" COLOR="#000000">
+ <p><font color="#808080">
+ <img border="0" src="../../images/links_icon.gif" width="25" height="25">
+ <b>Web Links</b></font></p>
+ </font><font FACE="Arial" SIZE="2" COLOR="#808080">
+
+ <p>Integrated Services Digital Network (ISDN)<p>
+ <a target="_blank" href="http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/isdn.htm">
+ http://www.cisco.com/univercd/cc/
+ td/doc/ cisintwk/ito_doc/ isdn.htm</a></font></p>
+
+ <p>
+ <IMG alt="" height="2" width="1" src="../../images/s.gif"></p>
+ </TD>
+ </TR>
+ </TABLE>
+ </TD>
+ </TR>
+ </TABLE>
+ </TD>
+ </TR>
+ </TABLE><p>
+
+
+ <font face="Arial" size="2"> </font></p>
+ </td>
+ </tr>
+ </table>
+
+</body>
+
+</html>
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