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<td bgcolor="#336666"><b><font face="Arial" size="2" color="#FFFFFF">4.2</font></b></td>
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<td bgcolor="#336666" width="100%"><strong>
<font face="Arial" size="2" color="#FFFFFF">ISDN Configuration</font></strong></td>
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<td bgcolor="#669999" height="25"><b>
<font face="Arial" size="2" color="#FFFFFF">4.2.3</font></b></td>
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<td bgcolor="#669999" height="25" width="100%"><strong>
<font face="Arial" size="2" color="#FFFFFF">Verifying ISDN configuration</font></strong></td>
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<font face="Arial" size="2">Several </font>
<font size="2" face="Courier New"><b>show</b></font><font face="Arial" size="2">
commands can be used to verify that the ISDN configuration has been
implemented correctly.
<img border="0" src="../../images/1.gif" align="absmiddle" width="12" height="12"></font><p>
<font face="Arial" size="2">To confirm BRI operations, use the </font>
<font size="2" face="Courier New"><b>show isdn status</b></font><font face="Arial" size="2">
command to inspect the status of the BRI interfaces. This command can
be used after configuring the ISDN BRI to verify that the TE1, or
router, is communicating correctly with the ISDN switch. In the Figure
<img border="0" src="../../images/2.gif" align="absmiddle" width="12" height="12"> output,
the TEIs have been successfully
negotiated and ISDN Layer 3 is ready to make or receive calls. </font></p>
<p><font face="Arial" size="2">Verify that Layer 1 Status is ACTIVE,
and that the Layer 2 Status state MULTIPLE_FRAME_ESTABLISHED appears.
This command also displays the number of active calls.</font></p>
<p><font face="Arial" size="2">The </font>
<font size="2" face="Courier New"><b>show isdn active</b></font><font face="Arial" size="2">
command displays current call information, including all of the
following:</font></p>
<ul>
<li><font face="Arial" size="2">Called number</font></li>
<li><font face="Arial" size="2">Time until the call is disconnected
</font></li>
<li><font face="Arial" size="2">Advice of charge (AOC) </font></li>
<li><font face="Arial" size="2">Charging units used during the call</font></li>
<li><font face="Arial" size="2">Whether the AOC information is
provided during calls or at end of calls</font></li>
</ul>
<p><font face="Arial" size="2">The </font>
<font size="2" face="Courier New"><b>show dialer</b></font><font face="Arial" size="2">
command displays information about the dialer interface:</font></p>
<ul>
<li><font face="Arial" size="2">Current call status </font></li>
<li><font face="Arial" size="2">Dialup timer values </font></li>
<li><font face="Arial" size="2">Dial reason </font></li>
<li><font face="Arial" size="2">Remote device that is connected</font></li>
</ul>
<p><font face="Arial" size="2">The </font>
<font size="2" face="Courier New"><b>show interface bri0/0</b></font><font face="Arial" size="2">
displays statistics for the BRI interface configured on the router.
Channel specific information is displayed by putting the channel
number at the end of the command. In this case, the </font>
<font face="Courier New" size="2"><b>show interface
bri0/0:1</b></font><font face="Arial" size="2"> command shows the following:</font></p>
<ul>
<li><font face="Arial" size="2">The B channel is using PPP
encapsulation.</font></li>
<li><font face="Arial" size="2">LCP has negotiated and is open.</font></li>
<li><font face="Arial" size="2">There are two NCPs running, IPCP and
Cisco Discovery Protocol Control Protocol (CDPCP).
<img border="0" src="../../images/3.gif" align="absmiddle" width="12" height="12"></font></li>
</ul>
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<TD bgcolor="#ffffff" width="15"> </TD>
<TD bgcolor="#ffffff"><font FACE="Arial" SIZE="2" COLOR="#000000">
<p><font color="#808080">
<a href="javascript:void(0)" onClick="window.open('../../elabs/mod04/elab_4_2_3/elab4_2_3.html','Interactivity','width=740,height=390,toolbar=0,resizable=yes,scrollbars=0,screenX=26,screenY=38,left=26,top=38');">
<img border="0" src="../../images/lab_icon.gif" width="25" height="25"><b></a>
<a href="javascript:void(0)" onClick="window.open('../../elabs/mod04/elab_4_2_3/elab4_2_3.html','Interactivity','width=740,height=390,toolbar=0,resizable=yes,scrollbars=0,screenX=26,screenY=38,left=26,top=38');">Lab Activity</a></b></font></p>
</font><font FACE="Arial" SIZE="2" COLOR="#808080">
<p>e-Lab Activity:
</font><font FACE="Courier New" SIZE="2" COLOR="#808080">
<b>show isdn status</b></p>
</font><font FACE="Arial" SIZE="2" COLOR="#808080">
<p>In this activity, the student will demonstrate how to use the
</font><b><font FACE="Courier New" SIZE="2" COLOR="#808080">
show isdn status</font></b><font FACE="Arial" SIZE="2" COLOR="#808080">
command to display the status of all ISDN interfaces.</p>
</font><font FACE="Arial" SIZE="2" COLOR="#000000">
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