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<html> <head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> <link type="text/css" rel="stylesheet" href="../../../../../css/ccna.css"> <script src="../../../../../js/framesetHelper.js" language="JavaScript"></script><script language="JavaScript"> var pageLoaded = false; var current = ''; var currentChapter = 'knet-v214aCH47505'; function launchReference(rioID, rloID, chapterID) { contentID = "knet-v214aCV47051"; dash = contentID.indexOf('-'); sub1 = contentID.substring(0,dash); sub2 = contentID.substring(dash+1); numbackParams = "CHAPID=" + chapterID + "/RLOID=" + rloID + "/RIOID=" + rioID; ContentRef = "../../../../../"+ numbackParams + "/"+ sub1 +"/"+ sub2 +"/"; eval('top.frames.main_frame.location.href="'+ContentRef+'referencecontroller_pf.html"'); } function PrevPage() { top.currentSupport--; if (top.currentSupport <= 0) { returnContent(); } else { if (top.firstSupportPage == top.contentResourceID) { returnContent(); } else if (top.prevPage == quizID) { launchQuiz(); } else { launchReview(); } } } function launchReview(reviewID) { top.currentSupport = 0; chapterID = "knet-v214aCH47505"; nbparams = "CHAPID="+chapterID+"/RLOID="+"knet-v214aRLO47654"+"/RIOID="+reviewID; dash = chapterID.indexOf('-'); sub1 = chapterID.substring(0,dash); sub2 = chapterID.substring(dash+1); ContentRef = "../../../../../"+ nbparams +"/"+ sub1 +"/"+ sub2 +"/"; //alert(ContentRef); eval('top.frames.main_frame.location.href="'+ContentRef+'pageframesetrio.html"'); //added for navigating between Quiz and Review and back to regular Chapter pages top.currentSupport++; top.firstSupportPage = reviewID; top.prevPage = reviewID; top.contentResourceID = ''; } function launchQuiz(quizID) { top.currentSupport = 0; chapterID = "knet-v214aCH47505"; nbparams = "CHAPID="+chapterID+"/RLOID="+"knet-v214aRLO47659"+"/RIOID="+"knet-v214aRIO121275"; dash = chapterID.indexOf('-'); sub1 = chapterID.substring(0,dash); sub2 = chapterID.substring(dash+1); ContentRef = "../../../../../"+ nbparams +"/"+ sub1 +"/"+ sub2 +"/"; //alert(ContentRef); eval('top.frames.main_frame.location.href="'+ContentRef+'pageframesetrio.html"'); //added for navigating between Quiz and Review and back to regular Chapter pages top.currentSupport++; top.firstSupportPage = quizID; top.prevPage = quizID; top.contentResourceID = ''; } function returnContent() { rioID = top.currentPage; rloID = top.currentRLO; ContentID = top.currentChapter; top.firstSupportPage = ''; top.prevPage = ''; top.contentResourceID = ''; top.currentSupport = 0; nbparams = "CHAPID="+ContentID+"/RLOID="+rloID+"/RIOID="+rioID; dash = ContentID.indexOf('-'); sub1 = ContentID.substring(0,dash); sub2 = ContentID.substring(dash+1); ContentRef = "../../../../../"+ nbparams +"/"+ sub1 +"/"+ sub2 +"/" eval('top.frames.main_frame.location.href="'+ContentRef+'pageframesetrio.html"'); } </script> </head> <body leftmargin="20" topmargin="10" marginwidth="30" marginheight="10" bgcolor="#FFFFFF" onLoad="window.focus();" background="../../../../../images/ccna/common/lab/bglab.gif"> <table bgcolor="#000000" cellspacing="0" width="100%" border="0"> <tr> <td width="100%"> <table cellpadding="4" cellspacing="1" width="100%" border="0"> <tr> <td width="10%" bgcolor="#FFFFFF" valign="top"> <table cellpadding="0" cellspacing="0" width="100%" border="0"> <tr> <td width="33%"><script language="JavaScript"> //if (parent.parent.getTopName() == "chapterframeset") //{ var imgSource = '../../../../../images/ccna/common/lab/labback.gif'; document.write('<a href="javascript:PrevPage();">'); document.write('<img src="' + imgSource + '" border="0">'); document.write('</a>'); //} </script></td><td width="33%"><img border="0" src="../../../../../images/ccna/common/icon4.gif"></td> </tr> </table> <p> </p> </td><td bgcolor="#FFFFFF" valign="top"> <p align="left"> <span class="resourceTitle">Lab 5.3.5 Cable Tester - Wire Map</span> </p><p class="smtext">Estimated time: 45 min.</p><p align="left"> <span class="resourceSectionTitle">Objectives:</span> </p> <blockquote> <span class="smtext"> <ul type="disc"><li>Demonstrate skill with a cable tester more advanced than a simple continuity/pin-out tester</li><li>Use the wire mapping features of the tester to check for opens and shorts with UTP cable</li><li>Perform wire mapping on cables, detecting faults that are not detectable with simple continuity measuring devices such as crossed and split pairs</li></ul> </span> </blockquote><p align="left"> <span class="resourceSectionTitle">Background:</span> </p> <blockquote> <p class="smtext">In this lab you will learn the wire mapping features of the Fluke 620 LAN CableMeter (or its equivalent). Wire maps can be very helpful in troubleshooting cabling problems with UTP cable. Wire maps are not used with coaxial cable since there is only one wired and no map is needed. A wire map allows the network technician to verify which pins on one end of the cable are connected to which pins on the other end. With an understanding of the proper wiring connections, you can determine when a cable is wired improperly, depending on its intended use. You will learn how to use a cable tester to check for the proper installation of Unshielded Twisted Pair (UTP) Category 5 (CAT 5) according to TIA/EIA-568 cabling standards in an Ethernet network. You will test different cables using all four pairs to determine some problems that can occur from incorrect cabling installation and termination.</p> <p class="smtext">The cabling infrastructure (or cable plant) in a building is expected to last at least 10 years. Cabling related problems are one of the most common causes of network failure. The quality of cabling components used, the routing and installation of the cable and quality of the connector terminations will be the main factors in determining how trouble-free the cabling will be.</p> </blockquote><p align="left"> <span class="resourceSectionTitle">Tools / Preparation:</span> </p> <blockquote> <p class="smtext">Prior to starting the lab, the teacher or lab assistant should have several correctly wired CAT 5 cables (both straight-through and crossover) to test. There should also be several CAT 5 cables created with problems such as poor connections and split pairs to test. Cables should be numbered to simplify the testing process and to maintain consistency. A cable tester should be available that can test at least continuity, cable length and wire map. Work individually or in teams. The following resources will be required:</p> <span class="smtext"> <ul type="disc"><li>CAT 5 straight-wired cables of different colors.</li><li>CAT 5 crossover cable (T568A on one end and T568B on the other)</li><li>CAT 5 straight-through cables with open wire connections in the middle or one or more conductors shorted at one end of different colors and different lengths.</li><li>CAT 5 straight-through cable with a split pair miswire.</li><li>Cable Tester (Fluke 620 LAN CableMeter or similar) to test cable length, continuity, wire map</li></ul> </span> </blockquote><p align="left"> <span class="resourceSectionTitle">Related Research websites:</span> </p> <blockquote> <span class="smtext"> <ul type="disc"><li><a target="_blank" href="http://www.fluke.com/"><span class="smtext">http://www.fluke.com/ </span></a> </li></ul> </span> </blockquote><p align="left"> <span class="resourceSectionTitle"><span class="resourceRed">Step 1 - Set the Advanced Cable Tester for the Desired Cable.</span></span> </p> <blockquote> <p class="smtext">These instructions pertain to the Fluke 620 LAN CableMeter. Turn the rotary switch selector on the tester to the WIRE MAP position. Press the SETUP button to enter the setup mode and observe the LCD screen on the tester. The first option should be CABLE: Press the UP or DOWN buttons until the desired cable type of UTP is selected. Press ENTER to accept that setting and go to the next one. Continue pressing the UP/DOWN arrows and pressing ENTER until the tester is set to the following cabling characteristics.</p> <table border="1" cellpadding="2" cellspacing="0" width="39%" bordercolor="#000000"><tr>⌨️ 快捷键说明
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