Gebruiksaanwijzing /service van het product Prestige 642 van de fabrikant ZyXEL Communications
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Pr estige 642 PPPoE Modem User's Guide Version 2.50 August 2001.
Prestig e 642 PPPoE M odem ii Copyright Copyright Copyrigh t © 2001 by Zy XEL Commun ications C o rporation . The content s of this pu blication may not be reproduced in any part or as a w hole, tran.
Prestig e 642 PPPoE M odem ZyXEL Lim ited War ranty iii ZyXEL Limited W arranty ZyXEL warrants to the original end user (pu r chaser) th at this product is free from any defects in materials or workmansh ip for a period of up to tw o (2) years f rom the date of purchase .
Prestig e 642 PPPoE M odem iv FCC Interfer ence Sta tem ent Federal Communications Commission (FCC) Interference Statement This device co mplies with Part 15 of FCC rules. Operatio n is subject to the following t wo conditions: This device may not cause harmful in terference.
Prestig e 642 PPPoE M odem Custom er Support v Customer Support Please hav e t he fol lowing inform at ion ready when you contact customer support . • Product model an d serial num ber. • Information in Menu 24.2. 1 – Sys tem Inform ation . • Warranty Inf or mation.
Prestig e 642 PPPoE M odem vi Table of Contents T able of Contents Copyright ...................................................................................................................... .................................... ii ZyXEL Limited Warranty .
Prestig e 642 PPPoE M odem Table of Contents vii 3.4.5 Advanced Setup — NAT (Network Address Transl ation) Applications.............................. 3-14 3.4.6 Advanced Setup — In ternet Security ..................................................
Prestig e 642 PPPoE M odem viii T able of Cont ents 5.4 Uploading Firmware Files .................................................................................................... .......... 5-8 5.4.1 FTP File Upload.................................
Prestig e 642 PPPoE M odem List of F igures ix List of Figures Figure 1-1 In ternet Access Application ......................................................................................... .............. 1-3 Figure 2-1 Fron t Panel of th e P642 ..
Prestig e 642 PPPoE M odem x List of T ables List of T ables Table 2-1 Fron t Panel LED Description .......................................................................................... ............ 2-1 Table 3-1 PPPoE Wizar d Screen Description .
Prestig e 642 PPPoE M odem Prefac e xi Preface A bout Y our ADSL Modem Congratu lations on your pu rchase of the Prestig e 642 Series ADSL Modem . The Prestige 642 is an ADSL modem used f o r Internet access via an ADSL line. It can run u pstream maximum rat e at 832Kbps an d down stream rate at 8Mbps .
Prestig e 642 PPPoE M odem xii Preface General Sy nta x Conventions • “Type” means for y o u to type on e or more characters an d press the carriage return. “Select” or “ Choose” means f or you to select one from the predef ined choices.
Prestig e 642 PPPoE M odem W hat is DSL? xiii What is DSL? DSL (Digital Subscriber Line) technolog y enhances the data capacity of the existing telephone line running between the local telephone com pany switching offices and m o st homes and offices.
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Prestig e 642 PPPoE M odem Getting to Kno w Your PPPoE Mod em 1-1 Chapter 1 Getting to Know Your PPPoE Modem This chapt er desc ribes the key features and appl ications of th e Prestig e 642 PPPoE m odem.
Prestig e 642 PPPoE M odem 1-2 Getting to Kno w Your PPPoE Mod em Multiple Protocol over AA L5 (RFC1483) PPP over Ethernet ov er AAL5 Protocols Suppor ted ¾ The Prest ige su pports PPP ov er Ethern et (RFC 2516) and R FC 1483 en capsula tion over ATM (idle timeout for PPPoE con nection s (100 seconds) may be altered via the web con figurator).
Prestig e 642 PPPoE M odem Getting to Kno w Your PPPoE Mod em 1-3 ¾ The Prestige has filtering functio ns that allow added network securit y and management. Default net bios filters are turned on when PPPo E is se lec ted. 1.3 Applications for the P r estige 642 P PPoE Modem 1.
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Prestig e 642 PPPoE M odem Hard ware Installa tion & Initia l Setup 2-1 Chapter 2 Hardware Installation & Initial Setup This chapt er desc ribes the phys ical fe atures o f the Pres tige and how to m ake t he cable co nnectio ns .
Prestig e 642 PPPoE M odem 2-2 Hardware Ins talla tion & Initial Se tup 2.2 Rear Panel and Connections of the P642 The follow i ng figure s hows the rear pan el connections of y our Prestige.
Prestig e 642 PPPoE M odem Hard ware Installa tion & Initia l Setup 2-3 2.2.4 Connecting the Console Port For the initial configuration of your P restige, you need to use terminal emulator software on a computer and connect it to the Prestige throu g h the cons ole port.
Prestig e 642 PPPoE M odem 2-4 Hardware Ins talla tion & Initial Se tup Figure 2-3 Connecting a POTS Splitter Step 1. Connect t he side labeled “ P hone” t o your telephon e. Step 2. Connect t he side labele d “Modem ” to your Pres ti ge. Step 3.
Prestig e 642 PPPoE M odem W eb Configurator 3-1 Chapter 3 Web Configurator This chapt er shows you how to confi gure and maint ain your Prestig e using t he web c onfigurat or. 3.1 Introducti on The web conf igurator is a user- friendly GUI (Graphic User In terface) that allows you to easily conf igure and maintain the Prestige.
Prestig e 642 PPPoE M odem 3-2 W eb Configurator 3.2 Login and Welcome Screens Launch y o ur web brow ser and en ter 192.168.1.1 as the URL. This is the factory default IP address of the Prestige when shipped. You w il l see the following Login screen.
Prestig e 642 PPPoE M odem W eb Configurator 3-3 Figure 3-3 Welcom e Scre en 3.3 Wizard Se tup Screen Use the wizard setup for initial Pr estige configuration. T he Prestige comes with some default setti ngs that shoul d ma ke co nfig urati on e ven e asier .
Prestig e 642 PPPoE M odem 3-4 W eb Configurator Figure 3-4 Initial Wiz ard Scre en 3.3.1 Wizard Setup — PP PoE Modem Screen The screen sh own next appears if y o u selected PPPoE Modem fro m the initial Wizard screen and allows you to enter In ternet Access information in one sc reen.
Prestig e 642 PPPoE M odem W eb Configurator 3-5 You can obtain your IP address from t he IANA, from an ISP or assigned f r om a private netw o rk. If you belong to a sm a ll organization and your In ternet access is through an ISP then ISP can provide you wi th the Internet address es for your local n etworks.
Prestig e 642 PPPoE M odem 3-6 W eb Configurator Tabl e 3-1 PPPo E Wizard Sc reen Des cription FIELD LABEL FIELD DESCRIPTION Modem Ty pe This field ref lects the type of modem you chose in the previous s creen (READ ON LY).
Prestig e 642 PPPoE M odem W eb Configurator 3-7 Figure 3-6 Modem Wizard Scre en Table 3- 2 Mo dem Wizard Screen D escriptio n FIELD LABEL FIELD DESCRIPTION Modem Ty pe This field ref lects the type of modem you chose in the previous s creen (READ O NLY).
Prestig e 642 PPPoE M odem 3-8 W eb Configurator 3.3.3 Wizard Setup — Fina l Wizard Screen After y ou configure your m odem, you will see the final Wizard screen shown n ext. Figure 3-7 Final Wizard Screen Congratulation s! Your should now be set up to access the Internet.
Prestig e 642 PPPoE M odem W eb Configurator 3-9 3.4.1 A dvanced Setup — Sy stem Administrat ion Screen Click the Advanced Setup link to disp lay the screen shown next.
Prestig e 642 PPPoE M odem 3-10 W eb Configurator FIELD LABEL FIELD DESCRIPTION Password Changi ng the system pa ssword is highly re commended. Old Passw ord Ty pe in your ex isting syste m password, i.e., 1234, th e default pa ssword. New Passw ord Enter your new system pas sword (up t o 30 characters) .
Prestig e 642 PPPoE M odem W eb Configurator 3-11 Table 3- 4 Advanced Setup — System Dat e & T ime Screen Descrip tion FIELD LABEL FIELD DESCRIPTION Date Current Date T his read-only field display s the curr ent date. New D ate Enter the new date in year , month and day an d format.
Prestig e 642 PPPoE M odem 3-12 W eb Configurator s/he sig ns up. I f your I SP d oes give you the DN S server a ddre sses, e nter the m in the DN S Server fields i n DHCP Setup, otherwise, leave them blank. If th e P rimary and Secondary DNS Server fields in DHCP Setup are not specified, i.
Prestig e 642 PPPoE M odem W eb Configurator 3-13 Figure 3-10 Advanced Setup — LAN Screen Table 3- 5 Advanced Setup — L AN Screen De script ion FIELD LABEL FIELD DESCRIPTION DHCP DHCP If set to Server , y our Prestige can as sign IP addre s ses, an IP default gateway and DNS servers to Windows and other systems that support the DHCP client.
Prestig e 642 PPPoE M odem 3-14 W eb Configurator Figure 3-11 Advanced Setup — LAN Screen — Status T ab Table 3- 6 Advan ced Setu p — L AN Screen — Status T ab Des cription BUTTON DESCRIPTION Previous Page Click Prev ious Page to vi ew the previous p age.
Prestig e 642 PPPoE M odem W eb Configurator 3-15 as having multiple legal addr esses, but only pa y for one IP address, thus saving signi ficantly on subscription fees (che ck with your ISP before you enable this feature). The IP address f or the NAT can be either fixed or dynamically assigned by the ISP.
Prestig e 642 PPPoE M odem 3-16 W eb Configurator configure a diff ere nt application n ot already pre-configured, choose Manual and then enter the port n umber in the Port Number field .
Prestig e 642 PPPoE M odem W eb Configurator 3-17 Table 3- 9 Applicat ions and Port Numb ers APPLICATIONS PORT NUMBER SERVER IP ADDRESS HTTP - Hy per Text Transfer Protocol or WWW W eb 80 Enter the insi de IP address of the server here. FTP - File Tr ansfer Protoco l 21 Enter the insi de IP address of the server here.
Prestig e 642 PPPoE M odem 3-18 W eb Configurator 3.4.6 A dvanced Setup — Internet Secur ity Click the Advanced Setup link and then click the Internet Security link to disp lay t he scre en sho wn ne xt. Use this screen to configure your security setttings.
Prestig e 642 PPPoE M odem W eb Configurator 3-19 SECURITY LEVEL DESCRIPTION Level 2 Level 2 se curity applies fil ter rules to pr event incoming (t o the Prestige) telnet and FTP/T FTP sessions as w ell as stop out going NetBIOS cal ls to the re mote node (ISP).
Prestig e 642 PPPoE M odem 3-20 W eb Configurator Figure 3-1 4 M aintenance — System Status Screen This screen shows y o u the status of your Prestig e.
Prestig e 642 PPPoE M odem W eb Configurator 3-21 FIELD LABEL FIELD DESCRIPTION Standard This field d enotes the ADSL sta ndard your Prestige u ses This f ield cannot be changed via the web configur ator. WAN Information IP Address This is the IP addres s you rece ived from you ISP.
Prestig e 642 PPPoE M odem 3-22 W eb Configurator 3.5.2 Maintenance — Syst em Statistics Click the Show Statisti cs button in the System Status screen to display the screen shown next. Use this screen to displa y performance statistics. Figure 3-1 5 M aintenance — System Statistic s Screen This screen shows y ou statistics for the ISP node.
Prestig e 642 PPPoE M odem W eb Configurator 3-23 Table 3- 12 Main tenance — Sys tem St atistics S creen De scription FIELD FIELD DESCRIPTION System up T ime This field d isplays the elap sed time your sy stem has been on. WAN Port Statistics (These pa ckets co me from your Prest ige and go to th e WAN).
Prestig e 642 PPPoE M odem 3-24 W eb Configurator 3.5.3 Maintenance — Diagnostic Scr een — General T ab Click the Ma intenance link and then the Diagnostic link to display the screen shown next.
Prestig e 642 PPPoE M odem W eb Configurator 3-25 3.5.4 Maintenance — Diagnostic Scr een — DSL Line T ab Click the Ma intenance link, the Diagnosti c link and then the DSL Line tab to d isplay the screen sho wn next. U se th is scre en to vie w diag nost ics.
Prestig e 642 PPPoE M odem 3-26 W eb Configurator BUTTON DESCRIPTION ATM Loopbac k Test Click ATM Loopb ack Test to send an F4/F5 OAM (Operation and Maintenanc e) packet to test the ADSL loop. The oper ability of t his feature depends on t he capability of y our ISP.
Prestig e 642 PPPoE M odem Comm and Line Inter face 4-1 Chapter 4 Command Line Interface This chapt er shows you how to co nfigure and maint ain your Pres tige usi ng the co mmand line interfac e. The command line interf ace is an alternate way to configu re the Prestige.
Prestig e 642 PPPoE M odem 4-2 Comm and Line Interf ace Please note that if there is no activity for longer than five minutes after you log in, your Pr estige will automatically log y ou out and will display a blank s creen. If you see a blank screen, press [ENTER] to bring up the l ogi n scree n aga in.
Prestig e 642 PPPoE M odem Comm and Line Inter face 4-3 4.2.2 Using Abbreviated CI Commands Some CI commands have abb reviated forms that allo w quicker Prestige configuratio n (and fewer keystrok es). T ype enoug h o f a CI comm and to dis tinguish it from other C I co mman ds.
Prestig e 642 PPPoE M odem 4-4 Comm and Line Interf ace 4.3 CI Commands The following sections list CI co mmands you may use with your syste m. Examples, after each table, denote proper comm and usage and des cribe what specific C I commands accomplish.
Prestig e 642 PPPoE M odem Comm and Line Inter face 4-5 4.3.2 Set Related CI Commands — Examples Set Mpoa Mux Command • The set mpoa mux command configures the multiplexing type for a remote node. The multiplexing type “vc” is conf igured for virtual circuit (remote node) 0, in th e exa mple shown next.
Prestig e 642 PPPoE M odem 4-6 Comm and Line Interf ace Change Console Speed to 9600. Then hit any key to continue Synta x: P642ME-13> set baudrate x where x is the cons ole port speed. 4.3.3 Show Related CI C ommands Table 4-4 Show Related CI Commands CI Command PARAMETER(S) Description show mpoa help Display help inf ormatio n.
Prestig e 642 PPPoE M odem Comm and Line Inter face 4-7 4.3.5 Sys R elated CI Commands Table 4-5 S ys Related CI Command s CI COMMAND PARAMETER(S) DESCRIPTION sys cpu display Display CPU usag e status. sys date [year mo nth date] Display sy stem date.
Prestig e 642 PPPoE M odem 4-8 Comm and Line Interf ace CI COMMAND PARAMETER(S) DESCRIPTION sys trclog clear Clear trace log. sys trcpacket create <entry> <size> Create packet tr ace buffer.
Prestig e 642 PPPoE M odem Comm and Line Inter face 4-9 Synta x: P642ME-13> sys reboot Sys Log Command • The sys log comma nd di spla ys error log information a nd allows you to turn log online on or off.
Prestig e 642 PPPoE M odem 4-10 Comm and Line Inter face Synta x: P642ME-13> sys date a b c where a = year, b = month a nd c = day. Sys T rcpack et Channe l Command • The sys trcpacket channel command defin e s the port and direction of the pack ets that you want to analyze.
Prestig e 642 PPPoE M odem Comm and Line Inter face 4-11 4.3.7 W A N Related CI Commands Table 4-7 W AN Related CI Commands CI COMMAND PARAMETER(S) DESCRIPTION wan adsl bert Check ADSL line BERT (Bit Error R ate Test). wan adsl chandata Check ADSL c hannel status.
Prestig e 642 PPPoE M odem 4-12 Comm and Line Inter face ok Syntax: P642ME-13> wan adsl [open|close] where [open|close] opens or clos es the WAN ADSL line. W AN ADSL Opmode Command • The wan adsl opmode comman d displays the ADSL st andard (operation al m ode) your Pres tige is usin g as sho wn ne xt.
Prestig e 642 PPPoE M odem Comm and Line Inter face 4-13 4.3.10 Device Related CI C ommands — Example Device Dial Co mmand • The device dial command initiates a PPP oE session. In the example shown next, remote node 1 is initiated by typing: P642ME-13> device dial 1 Start dialing for node <pppoe>.
Prestig e 642 PPPoE M odem 4-14 Comm and Line Inter face CI COMMAND PARAMETER(S) DESCRIPTION ip route status D isplay routi ng table. ip route add Add a gatew ay to a routin g table. ip route addiface Add an interfac e to a routing table. ip route addprivate Add a private ro uting entry.
Prestig e 642 PPPoE M odem Comm and Line Inter face 4-15 IP Ping Command The ip ping command s ends a signal to a host (IP address ) on a netw ork to see if that host is reachable from your host , as shown in the next example. P642ME-13> ip ping 192.
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Prestig e 642 PPPoE M odem Firm ware and Conf igurat ion File M ainten ance 5-1 Chapter 5 Firmware and Configuration Maintenance This chapt er tells you how to bac k up and restor e your co nfigurat ion file as we ll as up load n ew firmware an d a new c onfigur ation fi le.
Prestig e 642 PPPoE M odem 5-2 Firm ware and Conf igurat ion Fil e Mainten ance Table 5-1 Filename Conventions FILE TYPE INTERNAL NAME EXTERNAL NAME DESCRIPTION Configurati on File Rom-0 *.
Prestig e 642 PPPoE M odem Firm ware and Conf igurat ion File M ainten ance 5-3 Step 6. Use “get” to transf er files from the Prestige to the com puter , for example, “get rom-0 config.rom ” transfers the con figuration file on the Prestige to y o ur computer and renames it “conf ig.
Prestig e 642 PPPoE M odem 5-4 Firm ware and Conf igurat ion Fil e Mainten ance 5.2.3 Backup Configuration Using TFTP The Presti ge support s the u p /downloadin g of the fi rmware and th e configurati on file us ing TFTP (Trivial File Transfer Prot ocol) ov er LA N.
Prestig e 642 PPPoE M odem Firm ware and Conf igurat ion File M ainten ance 5-5 Table 5-3 General Commands for Third Party TFTP Clients COMMAND DESCRIPTION Host Enter the IP addre ss of the Prestige. 1 92.168.1.1 is the Pre stige’s default IP addre ss when shippe d.
Prestig e 642 PPPoE M odem 5-6 Firm ware and Conf igurat ion Fil e Mainten ance Figure 5-2 Backup Configuration Example After a successful backu p you will see the following screen. Enter “ at go” to restart th e system. Figure 5-3 Completion of Prestig e Backup 5.
Prestig e 642 PPPoE M odem Firm ware and Conf igurat ion File M ainten ance 5-7 Step 3. Pre ss [ENTER] when prompted f or a username. Step 4. Enter y our passw ord as reques ted (the defa ult is 1234). Step 5. Enter “bin” to set transfer mode to binary.
Prestig e 642 PPPoE M odem 5-8 Firm ware and Conf igurat ion Fil e Mainten ance Figure 5-5 Restore Configuration Example WAR N I N G ! DO NOT INTERUPT THE FIL E TR ANSFER PROC ESS AS THIS M A Y PERM ANENTL Y DAM AGE YOUR PR ESTIG E. After the restoration or configuration file transfer process has co mpleted, you will see the following screen.
Prestig e 642 PPPoE M odem Firm ware and Conf igurat ion File M ainten ance 5-9 WAR N I N G ! DO NOT INTERUPT THE FIL E TR ANSFER PROC ESS AS THIS M A Y PERM ANENT L Y DAM AGE YOUR PR ESTIGE. W HEN T HE FIRM W ARE UPLO AD PROCESS IS COM PLETE, T HE PR EST IGE WIL L AUTOM A T ICALL Y R EST ART .
Prestig e 642 PPPoE M odem 5-10 Firm ware and Conf igurat ion File M ainten ance 5.4.2 TFTP File Upload The Presti ge also su pports the uploading of firmware f iles using TFTP (Trivial F ile Transf er Protocol) over LAN. Al though TFTP sh ould w o rk over WA N as well, it i s not recomm e nded.
Prestig e 642 PPPoE M odem Firm ware and Conf igurat ion File M ainten ance 5-11 fast er. Any s erial communicat ions prog ra m s hould w or k f ine; howe ver, y o u mu st use the Xmodem protocol to perform t he upload. Example Xmodem Firmware Upload Using HyperT erminal Step 1.
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Prestig e 642 PPPoE M odem Tr oubleshootin g 6-1 Chapter 6 Troubleshooting This chapt er cov ers pot ential pr oble ms and pos sible remedi es. After each problem description, correctiv e instructions are provided to help y ou diagnose an d solve the correlatin g problem .
Prestig e 642 PPPoE M odem 6-2 Tr oubleshoot ing 6.3 Problems with the LA N Interface Table 6-3 Troubleshooting the LA N Interface PROBLEM CORRECTIVE ACTION Check the LAN LEDs on t he front panel. The LED s should be on for a port that h as a station c onnected.
Prestig e 642 PPPoE M odem Append ix A V PI and VCI A Appendix A VPI & VCI This append ix describ es VPI and VCI. ATM i s a co nnect ion -orie nted tech nolo gy, meani ng tha t it sets up virt ual c ircui ts o ver which e nd s yste ms communicate.
Prestig e 642 PPPoE M odem B Glossa ry Glossary 100Base-T Us es two pairs of twist ed-pair w i re with a maximum distance of 100 m eters between the hub and th e workstation.
Prestig e 642 PPPoE M odem Glossa ry C Interface device or dev ices. A command line is the line on the display screen where a command is expected. Generally, th e command line is the line that contains th e most recently displayed comman d prompt.
Prestig e 642 PPPoE M odem D Glossa ry Configurat or and menu s for c onfi guri ng key setti ngs a nd fe at ures. Ethernet A very comm on method of n etworking com puters in a LAN.
Prestig e 642 PPPoE M odem Glossa ry E attached. A LAN, as its name implies, is li mited to a local area. This has to do more with the electrical characteristics of the medium than the fact that many early LANs were design ed for departments, althoug h the latter acc urately des cribes a LAN as well.
Prestig e 642 PPPoE M odem F Glossa ry names an d pass words . This techn ique is vuln erable to w iretapping (eav e sdropping ) because th e password can be captured an d used by s o meone to log onto th e system. POP Post Office Protocol. This is a common protocol u sed for sen ding, receiving, an d delivering mail messages.
Prestig e 642 PPPoE M odem Glossa ry G offi ces); this is often called th e local loop. The PS T N is a circu it-s witched system, meaning that an end- to-end private circuit is established between caller and callee. PVC Per manent V ir tual Circui t.
Prestig e 642 PPPoE M odem H Glossa ry Software commands to a com puter somewhere else. TFTP Tr ivial File Transfer Protocol is an Internet file transfer protocol si milar to FTP (File Transfer Proto col), but it is scaled back in functionality so that it requires fewer resources to run .
Prestig e 642 PPPoE M odem Glossa ry I ZyN O S ZyXEL Network O perating Sy st em is th e firmware used in many ZyXEL products..
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Prestig e 642 PPPoE M odem Index K Index 1 10/100Mbps Fast Eth ernet LAN Interface ....... 1-1 A About This User’s Guide ................................... x i ADSL ............................................................... xiii ADSL Line Connections .
Prestig e 642 PPPoE M odem L Index E Ease of In stallation........................................... 1- 1 Exit Command ............................................... 4-10 F FCC..................................................................... iv FCC Rules.
Prestig e 642 PPPoE M odem Index M PPPoE Wizard Screen ...................................... 3-5 PPPoE Wizard Screen Description .................. 3-6 Preface ............................................................... xi Prestige 642 PP PoE Modem .
Prestig e 642 PPPoE M odem N Index ZyNOS F/W Version ....................................... 5-1 ZyXEL Limited Warranty ...............................
Een belangrijk punt na aankoop van elk apparaat ZyXEL Communications Prestige 642 (of zelfs voordat je het koopt) is om de handleiding te lezen. Dit moeten wij doen vanwege een paar simpele redenen:
Als u nog geen ZyXEL Communications Prestige 642 heb gekocht dan nu is een goed moment om kennis te maken met de basisgegevens van het product. Eerst kijk dan naar de eerste pagina\'s van de handleiding, die je hierboven vindt. Je moet daar de belangrijkste technische gegevens ZyXEL Communications Prestige 642 vinden. Op dit manier kan je controleren of het apparaat aan jouw behoeften voldoet. Op de volgende pagina's van de handleiding ZyXEL Communications Prestige 642 leer je over alle kenmerken van het product en krijg je informatie over de werking. De informatie die je over ZyXEL Communications Prestige 642 krijgt, zal je zeker helpen om een besluit over de aankoop te nemen.
In een situatie waarin je al een beziter van ZyXEL Communications Prestige 642 bent, maar toch heb je de instructies niet gelezen, moet je het doen voor de hierboven beschreven redenen. Je zult dan weten of je goed de alle beschikbare functies heb gebruikt, en of je fouten heb gemaakt die het leven van de ZyXEL Communications Prestige 642 kunnen verkorten.
Maar de belangrijkste taak van de handleiding is om de gebruiker bij het oplossen van problemen te helpen met ZyXEL Communications Prestige 642 . Bijna altijd, zal je daar het vinden Troubleshooting met de meest voorkomende storingen en defecten #MANUAl# samen met de instructies over hun opplosinge. Zelfs als je zelf niet kan om het probleem op te lossen, zal de instructie je de weg wijzen naar verdere andere procedure, bijv. door contact met de klantenservice of het dichtstbijzijnde servicecentrum.
