Manuel d'utilisation / d'entretien du produit Network Tester du fabricant Fluke
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NetT ool ™ Inline Network Tester Users Manual PN 1560821 June 2000, Rev 3, 3/05 © 2000-2005 Fluke Corporation, A ll rights reserved. All product names are trademarks of their respective companies.
LIMITED WARRANTY AND LIMITATION OF LIABILITY Each Fluke Networks product is warrante d to be free from defec ts in material and workman ship under normal use and service. The warranty period for the mainframe is one year and begin s on the date of purc hase.
i Table of Contents Chapter Title Page 1 Introduc tion ................................................................................................................. . 1-1 Using This Manual ..........................................................
NetTool Users Manual ii Understanding t he LEDs ........................................................................................... 1-6 Link/Collision/E rror LED .................................................................................
Contents (continued) iii 3 Aut oTest ..................................................................................................................... ... 3-1 Introduc tion ..........................................................................
NetTool Users Manual iv Ping........................................................................................................................... ..... 5-4 Assigning an IP Addre ss to NetT ool.....................................................
Contents (continued) v Viewing VLAN and CDP Information ......................................................................... 7-2 The VoIP Log ........................................................................................................
NetTool Users Manual vi.
vii List of Tables Table Title Page 1-1. NetTool's Device Icons .................................................................................................... ...... 1-7 3-1. Services Ne tTool Dis covers ....................................
NetTool Users Manual viii.
ix List of Figures Figure Title Page 1-1. NetTool Front P anel ....................................................................................................... ....... 1-1 1-2. Initia l Scre en ..................................................
NetTool Users Manual x 3-5. Diagram of an Inline Con nection ........................................................................................... 3-5 3-6. Inline Connection Betw een a PoE-Powered Device and the Netw ork ........................
1-1 Chapter 1 Introduction Using This Manual This Users Manual is supplied with the NetT ool™ Inline Network Tester (hereafter refe rred to as NetTool) to help you learn to use your new tester quickly and more efficiently.
NetTool Users Manual 1-2 NetTool is available in the foll owing models: • NetTool Standard: provides single- ended testing of network devices. Also includes a Ping function an d the capability to display VLAN traffic and CDP information.
Introduction What is NetTool? 1 1-3 • This NetTool Users Manual and the NetTool Quick Reference Guide • CD-ROM, containing this NetTool Users Manual , NetTool . Blaster! (updates software), and the NetTool Toolkit • CD-ROM, containing Key Device Watch.
NetTool Users Manual 1-4 Contacting Fluke Ne tworks www.flukenetworks.com support@flukenetworks.com +1-425-446-4519 • Australia: 61 (2) 8850-3333 or 61 (3) 9329 0244 • Beijing: 86 (10) 6512- 3435 .
Introduction Getting Acquainted 1 1-5 NetTool Toolkit NetTool Toolkit enables you to: • Generate reports • Download reports • Configure PING parameters and catalogs. Installing and Running the Link Utilities To install the programs: 1. Insert the CD-ROM that comes packaged with NetTool into your PC.
NetTool Users Manual 1-6 Understanding the LEDs On each side of the LCD, NetTool has a pair of LED indicators (Figure 1-3). These LEDs combin e to give you immediate insight and at-a-glance i nformation about your network environment.
Introduction Getting Acquainted 1 1-7 NetTool Menus NetTool has an icon- and menu-driven user interface. Icons The top area (Figure 1-4) con tains a connection diagr am. This diagram contains icons that show what type of device is connected to NetTool’s RJ-45 jack s.
NetTool Users Manual 1-8 • Key Devices : displays all of the servers, rout ers, and printers that NetTool finds on the network. • Toolkit or VoIP/Toolkit (so named if the VoIP option is installed): displays the Toolkit menu where you can access the Ping utility, the Reporter function, and health statistics.
Introduction Power Supply 1 1-9 Power Supply To supply power to the tester, you can use the four AA size batteries (supplied) or the (optional) rec hargeable batteries. Alternatively, you can use the (opt ional) AC adapter. Installing the Batteries Figure 1-5 shows you how to insert the four AA batteries into the tester’s battery compartment.
NetTool Users Manual 1-10 Updating NetTool’s Software From time to time, updates to NetTool’s software become available. • Select the NetTool icon then select About NetTool to find out what version of software is installed on the tester. • To find out if there is a new software version available, go to www.
2-1 Chapter 2 Setting Up and Connecting NetTool Introduction This chapter shows you how to set up NetTool. Among the tasks covered are how to set NetTool’s date and time, how to configure its IP address information, and h ow to locate important in formation, such as the serial number.
NetTool Users Manual 2-2 Changing the System Settings Select Settings to display the Settings menu: afq42s.bmp Figure 2-2. Settings Menu On this menu, you can do the following: • Check the battery level. If NetTool is running on battery power, the battery level indicator is display ed at the top of every Setup screen.
Setting Up and Connecting NetTool Configuring NetTool 2 2-3 • Restore factory default settings. Select Restore Defaults to restore all of NetTool’s factory default settings. Identifying Unwanted Protocols Select Unwanted Protocols to display a screen that allows you to identify protocols on the netw ork that you want NetTool to warn you about.
NetTool Users Manual 2-4 5. Press SELECT to save the IP address for NetTool. NetTool lists the updated address with the su bnet and router IP addresses. 6. In like manner, configure the subnet mask and router addresses. NetTool assists you by enteri ng the first parts of those addresses based on common addressing rules.
Setting Up and Connecting NetTool Connecting NetTool 2 2-5 Connecting NetTool NetTool has two RJ-45 jacks, one on each side. Use the supplied RJ-45 cable to connect a patch cabl e to NetTool and to create a single-ended or inline connection. NetTool also has a serial port, which en ables you to directly connect the tester to a PC.
NetTool Users Manual 2-6 Figure 2-4 shows a single-en ded connection to a wall jack. ahn308f.eps Figure 2-4. Single-Ended C onnection into a Wall Jack. Use this type of connection when you ne ed to check a network drop for activity and to find out what services lie on the other side.
Setting Up and Connecting NetTool Connecting NetTool 2 2-7 Inline Connection An inline connection entails having N etTool simultaneously plugged i n between two network devices, such between as a PC or a PoE-powered de vice and a network switch. Use this type of connection to verify whether the device can communicate prop erly with the network.
NetTool Users Manual 2-8 Serial Port Connection Note The recommended speed setting for the serial port is 115200. A serial port connection enables you to: • Download software (see “Updating the Software”) • Enable options • Save screens • Upload and downlo ad PING catalogs • Upload Report data.
3-1 Chapter 3 AutoTest Introduction AutoTest provides a good starting point for trying to determine what devices are on your network and for making a quick assessment of your network ’s overall condition. Results from AutoTest can alert you to connectivity problems before they impact net work performance.
NetTool Users Manual 3-2 Cable Test Results If NetTool is connected to a patch cable, AutoTest evaluates the integrity of t he cable and finds errors that might suggest a physical media problem. If a wiremap adapter is attached, NetTool performs deeper testing of the cable by additionally verifyi ng pin-to-pin connectivity.
AutoTest Running AutoTest 3 3-3 Single-Ended AutoTest Results AutoTest result screens vary depending o n the device that NetTool is connected to. Note This results described in this section are pro vided as examples of what information NetTool provides.
NetTool Users Manual 3-4 Table 3-1 lists the devices and services that NetTool discovers. Table 3-1. Services NetTool Discovers Device Services Servers IP Servers (IP services discovered): DHCP, DNS, email (SMTP, POP, IMAP), Web (HTTP, HTTP proxy), WINS.
AutoTest Running AutoTest 3 3-5 Inline AutoTest Results The diagrams at the top of the screen can give you a quick indication of what is going on with your network.
NetTool Users Manual 3-6 Polarity information is also given. The waveform-shaped icons used in the diagram ar e listed in Table 3-3. Table 3-3. Link and Polarity Level Indicator Definition Normal level, normal polarity Normal level, reverse polarity Low level, normal polarity Low level, reverse polarity.
AutoTest Running AutoTest 3 3-7 To get detailed results, move the cursor to one of the following icons then press SE LECT : • PC icon : enables you to view results for the device. Go to Chapter 4 “Troubleshooting a Network Device” for details. • Network icon : enables you to view network results.
NetTool Users Manual 3-8.
4-1 Chapter 4 Troubleshooting a Network Device Introduction NetTool can provide information that you ca n use to determine whether a device is configured properly for your network. After you have confidence that all of the stations and devices on your network are con figured correctly, you can move on to evaluate the entire network.
NetTool Users Manual 4-2 Five basic types of information about the device or network can be selected from this menu: • Link Config : provides link pulse information. If the VoIP option is installed, you can also fin d out PoE voltage and pair information.
Troubleshooting a Network Device Verifying a Device’s Configura tion 4 4-3 Checking Frames for Errors To find out how many frames have been transmitted and whether any errors were discovered i n those frames, display the Health screen (Figure 4-3): afq35s.
NetTool Users Manual 4-4 4. To change what NetTool is viewing in re al-time and to change the direction (that is, “to/from Network” or “to/from PC”), move the cursor to the desired device icon (located in the upper right or left). Then press SELECT .
Troubleshooting a Network Device Verifying a Device’s Configura tion 4 4-5 Tracking Protocols Note You can also view protocol inf ormation by selecting Protocols from the Main menu. To find out what protocols are associated with a devic e or running on the network, do the followin g: 1.
NetTool Users Manual 4-6 Obtaining a Device’s IP Address Information To obtain IP address information for a device, do the following: 1. Select Addresses Used to di splay the following: ahn25s.bmp Figure 4-7. Addresses Used Screen The Addresses Used screen enab les you to verify a devices’ IP address information.
Troubleshooting a Network Device Verifying a Device’s Configura tion 4 4-7 3. You can also find out what VLAN a devic e belongs to. Press the Down b arrow key to locate VLAN statistics, as shown in Figure 4-9: ahn322s.bmp Figure 4-9. VLAN Information NetTool can provide information for up to five discovered VLANS.
NetTool Users Manual 4-8.
5-1 Chapter 5 Troubleshooting Networks Introduction The information documented in this cha pter can help you evaluate the health of your network and assist you with troubleshooting network prob lems. NetTool features a Ping test, which is described in this chapter.
NetTool Users Manual 5-2 Four basic functional groups of information about the network are listed on this men u: • Link Config : provides link pulse information about the network. See “Viewing Link Status Information” in Chapter 4 for details. • Health : lets you monitor frames and view errors that indicate problems on the l ink.
Troubleshooting Networks Finding Out About Your Network 5 5-3 This screen also tells you which VLAN NetTool is connected to. If CDP informati on is found, it is also reported on this screen. Note The Segment ID screen is identical to the Addresses Used screen documente d in Chapter 4.
NetTool Users Manual 5-4 Ping NetTool can automatically ping any single de vice on your network or a group consisting of up to 10 devices. Ping provides instant informat ion about how a network device is connected and how it is acting on y our local segment, making it easier for you to pinpoint connectivity problems.
Troubleshooting Networks Ping 5 5-5 3. Do one of the following: • Select the IP address of the device from the list. OR • Select Add New Device to display the Edit screen.
NetTool Users Manual 5-6 3. To view results for a parti cular IP address, move the cursor to the address, then press SELECT . The Ping Results screen (Figure 5-6) for your selection is displayed: afq50s.bmp Figure 5-6. Ping Results Screen 4. To ping the list of IP addresses again, move the cursor to the name of t he catalog, then select Restart .
6-1 Chapter 6 Common Problems Introduction The Problem Log includes a li sting of all pr oblems that NetTool detected from the physical layer to application layer. Not every problem containe d in this log is at the same level of severity; therefore, just because a problem is listed here does not imply t hat it is a catastrophic one.
NetTool Users Manual 6-2 The Problem Log (Figure 6-2) is displayed: afq60s.bmp Figure 6-2. Problem Log Understanding the Problem Log Display There are nine types of probl ems listed in the Problem Log. Each type of problem has an icon ass ociated with it.
Common Problems Problems NetTool Detects 6 6-3 Things to Consider You can think of problems fitting into one of two categories: link connectivity or network. Link connectivity problems relate to cabling or cabling properties whi le network problems involve PC/ network configuration settings or PC-to-server interactions.
NetTool Users Manual 6-4 • Problem : Pair mismatch Explanation : The link pulse is being sourced on the same wire pair by both sides. This problem does not prevent connection to the network. NetTool automatically swaps the pairs to correct this probl em.
Common Problems Problems NetTool Detects 6 6-5 Network Problems This section lists all of the network problems. Keep in mind that this is not an exhaustive list of troubleshooting steps. If you know what you need, the network administrator for the network you are troublesh ooting can prov ide you with a lot of information to correct these problems.
NetTool Users Manual 6-6 NetWare • Problem : Ethernet frame-type mismatches . Explanation : For the PC and network to communicate, they both must be configured for the same frame type (802.3-raw, 802.2, Ethernet II, and SNAP). You can configure a client for a single frame type.
Common Problems Problems NetTool Detects 6 6-7 TCP/IP • Problem : PC using incorrect IP subnet mask. Explanation : NetTool has determined that the PC is not properly configured. Remedy : Access PC network properties and correct the IP subnet mask. • Problem : Router issued ICMP redirect.
NetTool Users Manual 6-8 • Problem : DHCP server issuing IP address that causes duplicate IP on network . Explanation : The DHCP server in question is not detecting an address and is provisionin g a duplicate. Remedy : This problem can be caused by a statically configured PC.
Common Problems Problems NetTool Detects 6 6-9 • Problem : No WINS server found on network to resolve names. Explanation : The PC is configured to use WINS (Windows Internet Name Service) and non e can be found. Remedy : Make sure the WINS server is up and running.
NetTool Users Manual 6-10 • Problem : xxx.xxx.xxx.xxx causing duplicate NetBIOS name. Explanation : Only one unique NetBIOS name is allowed on a domain. Remedy : The name specified on the PC needs to be changed to eliminate dupl ication. • Problem : PC involved in MB elections .
Common Problems Problems NetTool Detects 6 6-11 • Problem : Unable to connect to POP3 server Explanation : The PC cannot find the POP3 server it is configured to find.
NetTool Users Manual 6-12 Unwanted protocols (wh en enabled) The purpose of the Unwanted Protocols featu re is to enable you to find protocols that you do n ot want on the network. For example, if you have migrated away from NetWare on the network, NetTool wil l flag a device that still has NetWare configured on it.
7-1 Chapter 7 Verifying Voice over IP Service Introduction With the VoIP (Voice over IP) option enabled , you can use NetTool to verify VoIP service on a link.
NetTool Users Manual 7-2 Viewing PoE Voltage and Pair Information After you run AutoTest, you can obtain PoE voltage and pair information for the network or phone side. Do the following: 1. Depending on which si de you want to look at, select one of the following icons: • PC icon: • Network icon: .
Verifying Voice over IP Service The VoIP Log 7 7-3 When plugged into a switch V LAN port, the native and appliance (phone) VLANs ar e also displayed along with the CDP information, as shown in Figure 7-2: ahn320s.
NetTool Users Manual 7-4 Viewing Call Quality Measurements The VoIP Monitor tracks call quality (RTP data). To display the VoIP Monitor , do the following: 1. From the Main menu, select VoIP/Toolkit . 2. On the VoIP/Toolkit menu, select VoIP Monitor to display the screen shown in Figure 7-4: ahn309s.
8-1 Chapter 8 Creating and Managing Reports Introduction NetTool’s Reporter feature e nables you to capture d evice and network configuration data and save tha t information in a report.
NetTool Users Manual 8-2 Creating a Report Reporter enables you to creat e a report that reflects what NetTool currently detects on the PC (or another device) and/or the network. To create a report: 1. Connect NetTool to the device you want to ch eck and run AutoTest.
Creating and Managing Reports Deleting or Overwriting a Rep ort 8 8-3 c. Move the cursor to Save Report . Then, press SELECT to save. If you inadvertently give two reports the same name on NetTool, check the date/time stamp when you view the reports to differentiate between the m.
NetTool Users Manual 8-4.
Appendices Appendix Title Page Specificat ions ................................................................................................................. ...... A-1 VoIP Logs .....................................................................
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A-1 Appendix A Specifications General Specifications Media Access 10Base-T and 100Base-TX. Cable Tests Internal wiremap, cable lengt h, opens, shorts, and split pairs Ports Shielded Hub/NIC connector (RJ-45). Serial port – customized 2.5mm “stereo” input jack.
NetTool Users Manual A-2 Environmental Requirements Operating Temperature 10 ° C to 30 ° C with up to 95 % Relative Humi dity 10 ° C to 40 ° C with up to 75 % Relative Humi dity Non-Operating Temperature -20 ° C to +60 ° C Approvals The Fluke NetTool has the following a pprovals: European Standar d EN 60950, CSA/CAN C22.
B-1 Appendix B Sample VoIP Call Logs Introduction This appendix contains sample SCCP and SIP call lo gs. All of the logs contain running commentaries to familiar ize you with the messaging and information that is exchange d during a call.
NetTool Users Manual B-2 Typical Cisco Skinny (SCCP) Phone Bootup >DHCP DISCOVER 00c017a00079 >DHCP OFFER 129.196.197.016 >DHCP REQUEST 003094c4426f >DHCP ACK 129.
Appendices Sample VoIP Call Logs B B-3 Typical Cisco Skinny (SCCP ) Phone Bootup (continued ) <REGISTER_ACK >CAPABILITY_REQUEST <CAPABILITY_RESULT >TFTP file request SEP003094C4426F.cnf.xml >TFTP file request RINGLIST.XML >TFTP file request DISTINCTIVERINGLIST.
NetTool Users Manual B-4 Typical Cisco Skinny (SCCP) Call Log Following is a sample SCCP call log. Event s in the exchange are shown on the le ft. Commentary appears on the right to help you follow the sequencing of the exch ange. The log captures an entir e phone trans action, starting with the phone g oing OFF HOOK: CallMgr:129.
Appendices Sample VoIP Call Logs B B-5 Typical Cisco Skinny (S CCP) Call Log (continued ) RTP streaming… // the conversation has started 129.196.197.023:30142 // phone 1 IP address and port number VLAN:untag TOS:0xb8 // phone 1 VLAN and TOS being used 129.
NetTool Users Manual B-6 Typical Cisco Skinny (S CCP) Call Log (continued ) <RTP cnt:476fr Jitter:1ms Arrival Avg:20ms Min:19ms Max:20ms Drop:0fr DropBurst:0s Call Complete // phone 2 stats.
Appendices Sample VoIP Call Logs B B-7 Typical SIP Phone Bootup Log >DHCP DISCOVER 000f66fc9e72 >DHCP OFFER 129.196.196.202 >DHCP REQUEST 000f66fc9e72 >DHCP ACK 129.196.196.202 >DNS req:000f66fc9e72 atlas4.atlas.vonage.net <DNS response 216.
NetTool Users Manual B-8 Typical SIP Phone Bootup Log (continued) >DNS req:000f66fc9e72 ls.tftp.vonage.net <DNS response 192.015.192.015 // the phone looks up the FTP file server // the DNS server responds with the IP address >TFTP file request /uObE8NkRvq/spa000F66FC9 REGISTER sip:atlas4.
Appendices Sample VoIP Call Logs B B-9 Typical SIP Call Log INVITE sip:5983842@atlas 407 Proxy Authentication ACK sip:5983842@atlas4.a INVITE sip:5983842@atlas // the phone invites the other party // the gateway acknowledges the numb er 100 Trying 180 Ringing 180 Ringing 200 OK SIP RTP port 12436 ACK sip:17195983842@21 6.
NetTool Users Manual B-10 Typical SIP Call Log (continued) >RTP cnt:2186fr Jitter:21ms Arrival Avg:19ms Min:7ms Max:29ms Drop:23fr DropBurst:21ms // phone 1 stats—the number of RTP frames // the .
C-1 Appendix C Glossary 10BASE2 Sometimes called ThinLAN or CheaperNet, 10BASE2 is the implementation of t he IEEE 802.3 Ether net standard on thin coaxial cable. The maximum segment length is 185 meters. 10BASE5 Sometimes called Thi ckLAN, 10BASE5 is the implementation of the I EEE 802.
NetTool Users Manual C-2 10BASEF A point-to-point fiber link. This is the draft specification for IEEE 802.3 Ethernet over fiber optic cable. 10BASE-T 10BASE-T is the implementation of the IEEE 802.3 Ethernet standard on unshielded twisted-pa ir wiring.
Appendices C C-3 ARP (Address Resolution Protocol) A member of the TCP/IP protocol suite, ARP is the method by which a station’s MAC address is determin ed given a station’s IP (Int ernet Protocol) addres s. Attenuation A reduction in the strength of a signal; the opposite of gain.
NetTool Users Manual C-4 Client A client is a computer that makes requests of a server. A client has only one user; a server is shared by many users. Collision A collision is the result of two or more nodes transmitting at the same time. Excessive collisions are most often caused by a problem with the physica l media.
Appendices C C-5 Destination Address The address of the stati on receiving a frame. DNS Domain Name Services provides a mech anism that allows users to remember logical machine n ames rather than IP addresses. DNS provides ma pping between a machine name (e.
NetTool Users Manual C-6 Full-Duplex 10Base-T and 100Base-TX n etwork operation using a switching Hub to establish a point-to-point co nnection between LAN nodes that allows simultan eous sending and receiving of data packets. Full-duplex performance is twice that of half-duplex performance.
Appendices C C-7 Jabber A frame greater than the maximum legal size (greater than 1518 bytes) with a good or bad frame check sequence. In general, you should not see jabbers. The most likely causes of jabbers are a faulty NIC/driver or perhaps a cabling problem.
NetTool Users Manual C-8 NEXT Near-end crosstalk; crosstalk between two twisted pairs measured at the same end of the cable as the disturbing signal source. NIC (Network Interface Card) A network interface card is the adapter card that plugs into a computer to provide a network connect ion.
Appendices C C-9 Remote Collision A collision that occurs on the other side of a repeater. Since a 10BASE-T Hub is a multi-port repeater with a "segment" dedicated to each station, 10BASE -T collisions are remote collisions. Repeater A repeater is a layer-1 device that regenerat es and retimes frames.
NetTool Users Manual C-10 RTCP (Real-time Transport Control Protocol ) A protocol that provides insight on the perform ance and behavior of the RTP media stream. Runts Typically defined as an Ethernet frame which is less than 64 bytes. Depending on what dev ice is c ounting the runts, the frame check sequence may be good or b ad.
Appendices C C-11 SNAP (Subnetwork Access Proto col) An IP protocol that is an extended version of the IEEE LAN logical link control (LLC) frame. SNAP provides access to additional protocols and a llows vendors to create their own protocol sub-types.
NetTool Users Manual C-12 Topology Topology is the organization of network components. The topology of Token Ring network component s is a ring. Transport Transport refers to the physica l method by which data is transmitted (e.g., Ethernet, Token Ring, etc.
1 Index —A— AC adapter, 1-9 accessories (optional), 1-3 Addresses Used screen, 4-6 AutoTest, 3-1 cable test results, 3-2 PoE-powered device results, 3-7 services discovered, 3-4 single-ended resul.
NetTool Users Manual 2 —L— LEDs Link, Collision, and Error, 1-6 Utilization, 1-6 Left/Right arrow keys, 1-8 link and polarity levels, 3-6 Link Config screen, 4-2 —M— measurement units, changin.
Index ( continued ) 3 creating and saving, 8-2 deleting, 8-3 routers discovered, 3-4 —S— scrolling through menus, 1-8 Segment ID screen, 5-2 SELECT key, 1-8 serial port connection, 2-8 servers dis.
NetTool Users Manual 4.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté Fluke Network Tester c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du Fluke Network Tester - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Fluke Network Tester, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Fluke Network Tester va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Fluke Network Tester, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du Fluke Network Tester.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le Fluke Network Tester. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Fluke Network Tester ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
