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1. The 3Com USB driver did not install correctly or the 3Com USB driver is not running De install then re install the 3Com USB driver See the driver installation procedure in Your Installation Guide I successfully installed the 3Com USB driver but after rebooting I cannot communicate over the USB The USB LED on the Dual Link Unit is solid orange Control Center Connection Problems TOP Symptoms Possible Cause Corrective Actions From the Dual Link The modem is not Plug in the modem and allow it Control Center when I powered on sufficient time about 1 minute to attempt to connect to my complete the boot process service I get a connection timeout There s an Ethernet or USB connection problem See previous sections in this troubleshooting guide concerning Ethernet or USB connection problems Dual Link Manager Connection Problems TOP Symptoms Possible Cause Corrective Actions Power on the modem and allow it powered on sufficient time about 1 minute to I can t bring up the Dual The modem is not Link Manager from my browser complete the boot process There s an Ethernet or See previous sections in this USB connection problem troubleshooting guide concerning Ethernet or USB connection problems I did not first establish a Before you can access the Web based connection to the modem management screens of the Dual Link through the Dual L
2. Net nne Click on Services on the lower right portion of the Dual Link Manager to access the Services screen T BCom ADSL Modem Dual Link Manager Microroll Internet Explorer Elo Yew Go Foren Help Les om if 2s 38 82 Sewch Favorites History Channels l ukbown Mai Port La PD m dur conver at 3Comr HomeConnect ADSL Modem Dual Link Hanager Type a mame for the semice and use information fom your serace prowder for the other parameters Then press the Asd Busan to add the semce Service Name Operational C Bridged RFC 1423 Meda C PPPOE e ppp ve vpi o vapa Parameters Asa Cancal _ z ILL Enter the service name desired no spaces and VPI VCI information provided and click Add Notice that the Operational Mode PPP should be selected Microsoft Internet Explorer Ed 9 Create Service Another ISP Click OK Th 3Com ADSL Modem Dual Link Manager Microroll Internet Explorer 3Conr HorneConnect ADSL Modem Dual Link Manager y 3 The Dual Link Manager confirms that the service has been added Click Finished TJ on ADSL Modem Dual Link Manager Microroll Internet Explore 3Conr HomeConnect ADSL Modem Dual Link Manager To mew delete or seo throughput statistics for an exe tng sermoe select that service from the bet menu then select the Display Selected Service button To conse now anice Select the Add New Service Bumen Available Servic
3. PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS DUAL LINK USER S GUIDE Congratulations You are installed in PPP Mode PPP stands for Point to Point Protocol e To complete your installation and get dialing access e To add other PCs to your modem s configuration e To add other Internet Service Providers You have successfully installed your 3Com HomeConnect ADSL Modem Dual Link The Dual Link provides a flexible mechanism to link multiple computers to each other and to the Internet Your modem has the ability to support several ADSL service modes Your modem has been installed to support the PPP mode In the PPP mode you connect to the Internet by using the Broadband Dialer application supplied by 3Com with your modem While you can only connect one PC at a time to a specific Internet connection if you obtain and install multiple internet connections you can access different ISPs on other PCs attached to the modem First you will need to set up the 3Com Broadband Dialer in order to TOP complete your install process To do this from the Start button click Start gt Programs gt 3Com Dual Link Modem gt Dialer You will then enter the information provided by your Service Provider Once you have completed the installation of the Dual Link software on this PC you may want to set up additional PCs At some point you may need to have more t
4. Packet A piece of a message transmitted over a packet switching network In IP networks packets are often called datagrams In a packet switching network messages are divided into packets which are addressed and sent separately and matched up at their destination PIN A male lead a thin metal foot or prong on a connector POTS Plain Old Telephone Service PPP Point to Point Protocol A method of connecting a computer to the Internet Other methods are Bridged RFC 1483 and PPPoE PPP is one of the most widely used data link protocols in networks It lets a computer connect to the Internet with a standard dial up telephone line and a high speed modem In order to use PPP your service provider must support it PPPoE Point to Point Protocol over Ethernet PPPoE was developed to allow users to connect a LAN to connect to the Internet over a single link Virtual Circuit In PPP and RFC 1483 connections exist between the HomeConnect ADSL Modem Dual Link and the ISP while in PPPoE the link is to the individual PCs So the user on the LAN can select when to connect to a particular service by logging in to that service sort of like placing a telephone call Choosing which of the protocols to use is not up to the user but dependent on the ISP Ask your service provider if it s available Protocol An agreed upon format for transmitting data between two devices The protocol determines the type of error checking to be used th
5. To dial the connection double click on the ISP icon The first time that you attempt to connect you will complete the installation process by entering the username and password provided by your service provider in the boxes given This is done on each PC that you will be using to access the service User Name and Password Ea Enter the User Name for this Connection Enter the Password for this Connection Enter the Password one more time m oo es Cons Click Next to complete the setup Finish Connection x 2 You have successfully created a new connection named Press Finish to save the profile in the Connection folder Double click on the icon to start the connection To edit this profile right click on its icon and select Properties Bak Fm Cars Once you have entered the username and password you will be able to click on the ISP icon to immediately access the Internet You will also notice that a small icon has been added to the right hand side of your Start bar at the bottom of your screen You can right click on it to pull up a menu that ies 2 10 PM allows you to control your Internet connection About Bonnest Disconnect Connection Details Profile Properties Application Settings Advanced Exit Clicking on Connection Details gives you information on the current status of your connection Connected to ISP 2fx Connection Connected on Co
6. The power adapter supplied with the unit is fitted with a molded plug for connection to a standard electrical mains system supply socket If this plug is not suitable for connection to your mains supply contact your reseller for advice Do not attempt to connect to the mains supply using an inappropriate mains adapter Protect the unit from sudden transient increases and decreases in electrical power by fitting it with an in line surge suppressor or uninterruptible power supply Products manufactured by 3Com are safe and without risk provided they are installed used and maintained in good working order and in accordance with their instructions and recommendations Should any of the following conditions occur isolate the electricity supply and refer to your 3Com reseller e If the case or cover is not correctly fitted e If the case is damaged e If the unit begins to make an odd noise smell or emit smoke e If the unit shows signs of a distinct change in performance Never install telephone wires during a thunder storm or install telephone connection sockets in wet locations unless the socket is specifically designed for wet locations Do not touch uninstalled telephone wires or terminals unless the telephone line has been disconnected at the network interface Always exercise caution when installing or modifying telephone lines Do not spill food or liquids on the unit If the unit gets wet isolate the electrical supply and co
7. 90 days after purchase of the product from 3Com or its authorized reseller 3Com shall at its option and expense provide a software update which would effect the proper performance of such product repair such product deliver to Customer an equivalent product to replace such product or if none of the foregoing is feasible refund to Customer the purchase price paid for such product Any software update or replaced or repaired product will carry a Year 2000 Warranty for ninety 90 days after purchase or until April 1 2000 whichever is later OBTAINING WARRANTY SERVICE Customer must contact a 3Com Corporate Service Center or an Authorized 3Com Service Center within the applicable warranty period to obtain warranty service authorization Dated proof of purchase from 3Com or its authorized reseller may be required Products returned to 3Com s Corporate Service Center must be pre authorized by 3Com with a Return Material Authorization RMA number or User Service Order USO number marked on the outside of the package and sent prepaid and packaged appropriately for safe shipment and it is recommended that they be insured or sent by a method that provides for tracking of the package Responsibility for loss or damage does not transfer to 3Com until the returned item is received by 3Com The repaired or replaced item will be shipped to Customer at 3Com s expense not later than thirty 30 days after 3Com receives the defective product 3Com shall n
8. HomeConnect ADSL Modem Dual Link Advanced Procedures Genera Information
9. Link allows simultaneous use of the Ethernet and USB ports treating them as a single network That is computers that are attached to the Dual Link Ethernet port can share files and resources with a computer attached to the USB port For example you may have a desktop computer in your home office and a laptop computer that you also take with you to a remote office Typically you might use an Ethernet card in your laptop to connect to the corporate network At home you can connect your desktop computer to the USB port of the Dual Link and connect your laptop computer to the Ethernet port Both computers can share resources i e a printer or scanner etc and both can access the Internet or other remote destinations through the ADSL port Or use the Ethernet port for your desktop and the USB port for your laptop As an alternative you can run your Ethernet hub used with the network from the Ethernet port and use the USB port as well if desired DUAL LINK USER S GUIDE PPP Mode Getting Started The Online User s Guide Using your modem This guide is accessed from your 3Com ADSL Dual Link Program Group Advanced Operations 3 om ADSI Modem Dual Link DIE LIU EE Adhere MO C Prog He 3C on D CC aco bridge him General Information Troubleshooting EC ST DUAL Link USER S GUIDE FAQs Congratulations You are installed in PPP Mode PPP stands for Point to Point Protocol You have successfully installed your JCom
10. PictureTel Corporation UNIX is a registered trademark of X Open Company Ltd in the United States and other countries Other brand and product names may be registered trademarks or trademarks of their respective holders DUAL LINK USER S GUIDE PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQs Instant Update Utility Occasionally newer versions of the modem s internal software may be made available to reflect advances in the rapidly changing ADSL field This software will be made available from 3Com and can be downloaded to your PC using this Dual Link utility Once the new software is stored on your PC use the Manager to update the Dual Link modem e Installing Instant Update e Configuring Instant Update e Updating your modem software e Serial download Installing Instant Update TOP The Instant Update package allows you to automatically obtain software updates for your modem over the Internet To install it from your Install CD click on Start gt Programs gt 3Com Dual Link Modem gt Advanced gt Install Instant Update red d Mina Instant Update This will start the install procedure Ensure your CD is in your CD ROM drive Then click OK Instant Update Install Ed A Insert your 3Com HomeConnect ADSL Modem Dual Link CD in your CD ROM drive and wait for the light on the CD drive to stop blinking NNI You will be asked to accept o
11. Reset ADSL Une Diegnostes System Parameters Traffic Sharing Allow trafic between USB Workstation and LAN ves ADSL Wire Palr Pena wire pair fce data transizioni well reset finncrPeir Sutienit Changes Finshad E EF B Internet ne Normally once your Dual Link Modem is up and running you won t need to do anything further If you should need to in System Maintenance you can e Reboot e Upgrade the software e Reset the ADSL line e View diagnostics System Parameters include the Traffic sharing setting and ADSL Wire Pair selected on your Dual Link installation e if you want to allow information sharing between the USB and Ethernet ports you will need to ensure that the Traffic Sharing function is set to YES e ADSL uses one of two sets of wires in the connecting line to access your service Generally the correct pair is automatically selected during the installation process and should not be changed This function is provided on the remote possibility that some manual change is required DUAL LINK USER S GUIDE PPP Mode Getting Started Rebooting the Dual Link Using your modem If you press the Reboot button you ll see the following warning Advanced Operations 3 SCom ADSL Moden Dual Link Manager Microsoft Immm nm Explorer Ele Eat Yew Go Fawotes Help sens 87 hitze ernie dusting cones moot General Information 3Com HomeConnect Troubleshootin ADSL Modem Dual Link Ma
12. deleting the current configuration 3 oe ADSL Moden Dual Link Manager Microsoft Intemnet Explorer Be EG View Go Favile Hep Diese E r p duari con ISA SE ce vessel 3Conr HomeConnect ADSL Modem Dual Link Manager Select Finished 1a view analher service Refresh Statistics to update Ihe statistics ce De ele Service to delete the serice Service Nome ISP Operational Bridged RFC 1 483 Mode ve VPI 0 VEI 36 Parameters Service Packets Transmitted 14185138 Statistics Packets Recenad 21582302 Delete Service Refresh Statistica Fwished DUAL LINK USER S GUIDE PPP Mode Getting Started You can add additional ISPs to your Dialer Using your Profile modem In order to add a connection you will need the following information from your service Advanced provider Operations VPI VCI General Information wemamepasword 0 Troubleshooting First access the Dual Link modem by clicking FAQs Start gt Programs gt Dual Link Modem gt Modem Settings er Programs Modem Settings Your browser should automatically connect to the modem and display the Dual Link Manager screen 3 Com ADSL Modem Dust Link Manager Microsoit Internet Explorer fe d View Go Favodes Heb Address 2 hp Wet dial con 3Com HomeConnect ADSL Modem Dual Link Manager ADSL Line Up USBLAN Stare Traffic Enabled Dual Link Software Version Chipset Software System Sarnices
13. lot correctly the Auto Detect setting to allow the modem to select the correct pair The distance from the CO may be Check statistics in the Dual Link at or near maximum causing loss Manager Systems Diagnostics of signal page If you see a low upstream signal to noise ratio or a large number of errors you may have a line quality issue Contact your service provider Wiring inside the house may be Make sure any filter or splitter causing interference from analog which you received from your phones or modems service provider is installed properly Slow Network Response TOP Symptoms Possible Cause Corrective Action Web browsing is slower than ADSL level connection expected Use Dual Link Manager to problem reset the ADSL line then reconnect to your service Contact your service provider DUAL LINK USER S GUIDE PPP Mode Getting Started The Dual Link Manager Summary Page Usin our modem 3 Ioa ADSL Modem Dust Link Manager ILS ES Advanced Operations General Information CAM ADSL Modem Dual Link Manager Troubleshooting FAQs ADSL Line Up IUSBLAM Sanna Traffic Enabled Dwal Link Software V1 07 Version The Systems Page 3 Com ADSL Modem Dual Link Manager Microsoft imunan Explorer EIN E o li 3Conr HomeConnect ADSL Modem Dual Link Manager System Maintenance Traffic Sharing Allowtraffic between USB Workstation and LAN Ves Select wire
14. pair fee data transmission well reset InnorPeir hna ADSL Wire Palr 3ConrHomeConnect ADSL Modem Dual Link Manager To view delete or see throughput stalistics for an existing serece select that serace from the list menu than select the Display Selected Serrce button To create a new samice select Ihe Add New Service button Available Services se DUAL LINK USER S GUIDE PPP Mode Getting Started Frequently Asked Questions Using your modem e What if I have other PCs that I need to configure Advanced Operations e How do I upgrade code General Information e How can I obtain Diagnostic information Troubleshooting e How can I check the status of the DSL Line FAQs e How do I uninstall the software on my PC e How can I delete the configuration o On the back of the Dual Link modem there is a small button that you can use to reset the modem Unplug the modem hold the reset button in for 5 seconds while plugging the modem back in to its power source e How can I re install the modem o To reinstall the modem first the software should be removed from any PCs you are running on the modem and then the modem configuration should be deleted DUAL LINK USER S GUIDE PPP Mode Getting Started Configuring other PCs to use your Modem Using your modem Configuring other PCs in PPP mode Advanced Operations You must run the HomeConnect Dual Link modem installation on each PC th
15. through leased lines cable or satellites The largest WAN in existence is the Internet Workstation 1 In networking workstation refers to any computer connected to a local area network It could be a workstation definition 2 or a personal computer PC 2 A workstation in a second sense generally means a computer that is capable of a moderate amount of computing power and high graphics capabilities It is somewhere in power between a PC and a mini computer although the lines are becoming more and more blurred PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS Manufacturer s Declaration of Conformity We declare under our sole responsibility that this product HomeConnect ADSL Modem Dual Link to which this declaration relates is in conformity with the following standards or more normative documents ANSI C63 4 1992 Methods of Measurement Federal Communications Commission 47 CFR part 15 subpart B 15 107 e Class B conducted limits 15 109 g Class B Radiated Emissions Limits 3Com Corporation 5400 Bayfront Plaza Santa Clara California 95 52 8145 Tested to comply with FCC Standards for Home and Office Use FCC CLASS B STATEMENT This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions This device may not cause harmful interference and This device must accept any interference received includ
16. 04 000 00345 4 NOTE In order to maintain compliance with the limits of a Class B digital device 3Com requires that you use quality interface cables when connecting to this device Changes or modifications not expressly approved by 3Com could void the user s authority to operate this equipment Refer to the manual for specifications on cabling types UL CERTIFIED CUL CERTIFIED This information technology equipment is UL certified and CUL certified for the uses described in this guide IC INDUSTRY CANADA INDUSTRY CANADA CLASS B EMISSION COMPLIANCE STATEMENT This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the interference causing equipment standard entitled Digital Apparatus ICES 003 of Industry Canada AVIS DE CONFORMITE A LA REGLEMANTATION D INDUSTRIE CANADA Cet appareil num rique respecte les limites de bruits radio lectriques applicables aux appareils num riques de Classe B pr scrites dans la norme sur le mat riel brouilleur Appareils Num riques NMB 003 dict e par I Industrie Canada Canadian Installations NOTICE The Industry Canada IC label identifies certified equipment This certification means the equipment meets certain telecommunications network protective operational and safety requirements as prescribed in the appropriate Terminal Equipment Technical Requirements document s The Department does not guarantee the equipme
17. A und BBBB SELV SELV Safety Extra Low Voltage ist ein sekund rer Schaltkreis der unter normalen und Single Fault Bedingungen so eingerichtet ist da die Spannung zwischen zwei zug nglichen Bauteilen einen Sicherheitswert nicht bersteigt 42 2 V Spitzenspannung bzw 60 V Gleichspannung Die Einheit enth lt keine Sicherungen oder sonstige Bauteile die vom Benutzer ausgewechselt oder gewartet werden k nnen Sollte ein physikalischer Fehler auftreten der mit den in diesem Handbuch beschriebenen Ma nahmen nicht zu beheben ist setzen Sie sich mit dem 3Com Vertreter in Verbindung bei dem Sie das Ger t erworben haben Bei stapelf higer Konstruktion nur gleichartige Einheiten verwenden Nur f r ServiceConnect Erden Sie das Ger t an der Grundplatte des ServiceConnect 2000 Geh uses WARNUNG Twisted Pair RJ45 Datenschnittstellen Dies sind abgeschirmte RJ45 Schnittstellen die nicht f r Telefonsignale verwendet werden k nnen SchlieBen Sie an diesen Schnittstellen nur RJ45 Datenstecker an PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS DUAL LINK USER S GUIDE Important Notice de Securite AVERTISSEMENT les avertissements pr sentent des instructions que vous devez suivre tr s attentivement pour votre s curit personnelle Veuillez lire les informations suivantes attentivement avant l installation de l appareil Soyez tr s prudents pendant tou
18. EVEN IF 3COM OR ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND LIMITS ITS LIABILITY TO REPAIR REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID AT 3COM S OPTION THIS DISCLAIMER OF LIABILITY FOR DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE DISCLAIMER Some countries states or provinces do not allow the exclusion or limitation of implied warranties or the limitation of incidental or consequential damages for certain products supplied to consumers or the limitation of liability for personal injury so the above limitations and exclusions may be limited in their application to you When the implied warranties are not allowed to be excluded in their entirety they will be limited to the duration of the applicable written warranty This warranty gives you specific legal rights which may vary depending on local law GOVERNING LAW This Limited Warranty shall be governed by the laws of the State of California U S A excluding its conflicts of laws principles and excluding the United Nations Convention on Contracts for the International Sale of Goods 3Com Corporation 5400 Bayfront Plaza P O Box 58145 Santa Clara CA 95052 8145 408 326 5000 June 7 1999 PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS Copyright Information 3Com Corporation 5400 Bayfront Plaza Santa Clara Califor
19. HER WARRANTIES TERMS OR CONDITIONS EXPRESS OR IMPLIED EITHER IN FACT OR BY OPERATION OF LAW STATUTORY OR OTHERWISE INCLUDING WARRANTIES TERMS OR CONDITIONS OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE SATISFACTORY QUALITY CORRESPONDENCE WITH DESCRIPTION AND NON INFRINGEMENT ALL OF WHICH ARE EXPRESSLY DISCLAIMED 3COM NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE OR USE OF ITS PRODUCTS 3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT OR MALFUNCTION IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY CUSTOMER S OR ANY THIRD PERSON S MISUSE NEGLECT IMPROPER INSTALLATION OR TESTING UNAUTHORIZED ATTEMPTS TO OPEN REPAIR OR MODIFY THE PRODUCT OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE OR BY ACCIDENT FIRE LIGHTNING POWER CUTS OR OUTAGES OTHER HAZARDS OR ACTS OF GOD LIMITATION OF LIABILITY TO THE FULL EXTENT ALLOWED BY LAW 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY WHETHER BASED IN CONTRACT OR TORT INCLUDING NEGLIGENCE FOR INCIDENTAL CONSEQUENTIAL INDIRECT SPECIAL OR PUNITIVE DAMAGES OF ANY KIND OR FOR LOSS OF REVENUE or profits LOSS OF BUSINESS LOSS OF INFORMATION OR DATA OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE SALE INSTALLATION MAINTENANCE USE PERFORMANCE FAILURE OR INTERRUPTION OF ITS PRODUCTS
20. Instant Update utility from your modem s installation CD the utility will search for and download from the 3Com web site any update to the Nac file Once you ve received an updated Nac file you would install to the modem using the DL manager NIC network interface card An expansion board or adapter that you install or insert into a computer in order to make it capable of communicating to a network A common example is an Ethernet LAN adapter IP Internet Protocol Specifies the format of packets pieces of data and the addressing scheme Most networks combine IP with a higher level protocol called Transport Control Protocol TCP which establishes a virtual connection between a destination and a source IP by itself is like a postal system Using it you can address a package and drop it in the mail but there s no direct link between you and the recipient TCP IP on the other hand establishes a connection between two hosts so that they can send messages back and forth for a period of time IP Address An identifier for a computer or device on a TCP IP network Networks using the TCP IP protocol route messages based on the IP address of the destination The format of an IP address is a 32 bit numeric address written as four numbers separated by periods Each number can be zero to 255 For example 1 160 10 240 could be an IP address Jack The part of a cable that plugs into a port or interface to connect one device to another
21. LAN standards Its function is to move data packets from one computer to another Flash Memory Host An area on the modem where basic information necessary to operate the modem is stored In your modem Dual Link it contains a program with the extension nac which must be easy to update but not easy to erase A utility provided on your installation CD if you install it on your PC can search for any updates to the Nac file from the 3Com web site The word Host has several different meanings in the computer industry The host can be referred to as the computer system that is accessed remotely by modem over telephone lines by a user sitting at a remote terminal It has also come to mean any computer connected to a TCP IP network including the Internet Each Host has a unique IP address To host on the other hand means to provide the infrastructure for a computer service as for example to host Web servers where the hardware software and communication lines are provided and controlled by the company providing the server while the content on the server is controlled by the user Hub LAN A conduit for information between devices that are part of a network A hub contains a number of ports which all participating devices computers printers scanners etc in the network plug into The hub then receives and directs information to all segments of the LAN A computer network that spans a relatively small area Most LANs are con
22. REPAIR SERVICE CENTER Keating Technologies 25 Royal Crest Court Suite 200 Markham ONT L3R 9X4 AVIS L tiquette de Industrie Canada identifie le mat riel homologu Cette tiquette certifie que le mat riel est conforme certaines normes de protection d exploitation et de s curit des r seaux de t l communications Le Minist re n assure toutefois pas que le mat riel fonctionnera la satisfaction de l utilisateur Avant d installer ce mat riel l utilisateur doit s assurer qu il est permis de le raccorder aux installations de l enterprise locale de t l communication Le mat riel doit galement tre install en suivant une m thode accept e draccordment L abonn ne doit pas oublier qu il est possible que la conformit aux conditions nonc es ci dessus n emp che pas le d gradation du service dans certaines situations Les r parations de mat riel homologu doivent tre effectu es par un centre d entretien canadien autoris d sign par le fournissuer La compagnie de t l communications peut demander l utilasateur de d brancher un appareil la suite de r parations ou de modifications effectu es par l utilasateur ou cause de mauvais fonctionnement Pour sa propre protection l utilisateur doit s assurer que tous les fils de mise la terre de la source d nergie lectrique des lignes t l phoniques et des canalisations d eau m talliques s il y en a sont raccord ensemble Cette pr caution e
23. a debe centrarse con respecto a la base del bastidor de ServiceConnect 2000 ADVERTENCIA puertos de datos de par trenzado RJ45 Son enchufes blindados RJ45 a los que s lo deben acoplarse conectores de datos RJ45 No pueden utilizarse como enchufes telef nicos Informazioni importanti per la sicurezza AVVERTENZA il testo delle avvertenze riporta importanti istruzioni alle quali occorre attenersi per motivi di sicurezza Seguire attentamente tutte le istruzioni Prima di installare l unit leggere attentamente le informazioni riportate di seguito Procedere con estrema cautela durante l installazione e la rimozione dell unit Collocare l unit vicino a una presa di corrente e verificare che la presa sia accessibile Per garantire la conformita alle norme di sicurezza nazionali e internazionali usare l adattatore di corrente fornito con l unit Se l adattatore non compreso il cavo alimentatore deve essere conforme alle norme locali e nazionali del paese di destinazione nonch all omologazione di sicurezza del prodotto per ulteriori informazioni consultare la sezione relativa alle omologazioni riportata alla fine del manuale Scollegare l adattatore prima di spostare l unit Per scollegare l unit occorre rimuovere l adattatore dall unit stessa o dalla presa di corrente Collegare alle porte dell unit solamente apparecchi conformi ai requisiti della relativa interfaccia Le specifiche riguardanti la sicurezza delle porte so
24. abel as well as inside the package If possible send the package via a courier capable of tracking the progress of the shipment Ship to the following address 3Com USO Dock 15 1800 W Central Road Mount Prospect IL 60056 Customers in Canada needing to return a modem for repair or replacement should send the modem to the following address Keating Technologies 25 Royal Crest Court Suite 120 Markham ONT L3R 9X4 DUAL LINK USER S GUIDE PPP Mode Getting Started Glossary Using your modem ADSL Asymmetric Digital Subscriber Line i A new technology that allows more data to be sent over existing copper telephone Advanced Operalons lines POTS or Plain Old Telephone Service ADSL is more than 275 times faster than a 28 8 modem and up to 4 times faster than a T1 connection That s really really fast DSL ADSL SDSL technology uses your ordinary phone line but doesn t tie it up You can access the Internet while you are telephoning or General Information Troubleshootin faxing ADSL requires a special ADSL modem which allows your PC to connect to a remote site using a network protocol such as IP or IPX Your HomeConnect FAQs ADSL Modem Dual Link contains one ADSL modem port which is the WAN Wide Area Network interface ADSL service runs between your home and your service provider who then uses ATM technology to speed communications to more distant points ATM Asynchronous Transfer Mode A network techn
25. aillance unique la tension n exc de jamais la valeur de s curit de 42 2 V en cr te ou 60 V DC L appareil ne contient aucun fusible rempla able par l utilisateur ni aucune pi ce dont la maintenance peut tre effectu e par l utilisateur Si un probl me physique survient dans l appareil qui ne peut tre r solu au moyen des techniques de d pannage du pr sent manuel contactez le revendeur 3Com qui vous a fourni l appareil Si vous disposez de plusieurs appareils empilables sur racks n empilez que les appareils similaires ServiceConnect uniquement connectez la terre au milieu de la base du rack ServiceConnect 2000 AVERTISSEMENT ports de donn es RJ45 paires torsad es Il s agit de prises de donn es RJ45 blind es Elles ne peuvent tre utilis es comme prises de t l phone Elles ne doivent recevoir que les connecteurs de donn es RJ45 PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS Medidas de seguridad importantes ADVERTENCIA las advertencias contienen instrucciones que es preciso seguir al pie de la letra para evitar da os personales Antes de instalar la unidad lea atentamente la siguiente informaci n Tome todas las precauciones necesarias a la hora de instalar o desinstalar la unidad Coloque la unidad cerca de una toma de corriente de f cil acceso Utilice el adaptador de corriente suministrado con la unidad de este modo se ase
26. at will use the modem to access the Internet General Information DE Simply insert the installation CD in your CD ROM drive and perform the installation as directed on the Installation map provided with your modem Troubleshooting FAQs Then follow the instructions to configure that PC to access the 3Com Broadband Dialer by adding the username and password you received from your service provider DUAL LINK USER S GUIDE PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQs Completing your connection in PPP Mode In PPP Mode you need to complete the installation process on each PC you want to have access to the service you have purchased To do this you need to add some information which you received from your service provider to the 3Com Broadband Dialer application First access the Broadband Dialer by clicking Start gt Programs gt Dual Link Modem gt Dialer 7 E 3Com Dual Link Modem i Pa Programs gt gt gt f3145 005 Prompt AJ Windows Explorer The Broadband Dialer window will appear During the installation process an icon named ISP was created and placed in the Dialer Profiles dialog box as shown Hl Profiles ADSL Modem Dual Link Bie x Fie Edt View Connections Help B Ax 2 B Profiles Double click on an icon to make a connection or double click on Create New Profile to create a new Profile
27. ations as being compatible 3Com will make reasonable efforts to provide compatibility except where the non compatibility is caused by a bug or defect in the third party s product or from use of the software product not in accordance with 3Com s published specifications or user manual THIS 3COM PRODUCT MAY INCLUDE OR BE BUNDLED WITH THIRD PARTY SOFTWARE THE USE OF WHICH IS GOVERNED BY A SEPARATE END USER LICENSE AGREEMENT THIS 3COM WARRANTY DOES NOT APPLY TO SUCH THIRD PARTY SOFTWARE FOR THE APPLICABLE WARRANTY PLEASE REFER TO THE END USER LICENSE AGREEMENT GOVERNING THE USE OF SUCH SOFTWARE YEAR 2000 WARRANTY In addition to the Hardware Warranty and Software Warranty stated above 3Com warrants that each product sold or licensed to Customer on and after January 1 1998 that is date sensitive will continue performing properly with regard to such date data on and after January 1 2000 provided that all other products used by Customer in connection or combination with the 3Com product including hardware software and firmware accurately exchange date data with the 3Com product with the exception of those products identified at 3Com s Web site http www 3com com products yr2000 html as not meeting this standard If it appears that any product that is stated to meet this standard does not perform properly with regard to such date data on and after January 1 2000 and Customer notifies 3Com before the later of April 1 2000 or ninety
28. e data compression method how the sending device will indicate that it has finished sending a message and how the receiving device will indicate that it has received a message From a user s point of view the only interesting aspect about protocols is that your computer or device must support the right ones if you want to communicate with other computers PVC permanent virtual circuit A virtual circuit that is permanently available The only difference between a PVC and a switched virtual circuit SVC is that an SVC must be re established each time data is to be sent Once the data has been sent the SVC disappears PVCs are more efficient for connections between hosts that communicate frequently RFC Short for Request for Comments a series of notes about the Internet started in 1969 An RFC can be submitted by anyone Eventually if it gains enough interest it may evolve into an Internet standard RFC 1483 is the protocol traditionally used for ATM networks Each RFC is designated by an RFC number Once published an RFC never changes Modifications to an original RFC are assigned a new RFC number RFC 1483 This is a protocol used for ATM networks It s a very efficient channel or path for data transmission It differs from PPPoE and PPP in that it doesn t provide any built in negotiation for addresses or connection RJ 11 Jack Short for Registered Jack 11 a four or six wire connector used primarily to connect telephone equip
29. ed When you plug in the modem the PC senses voltage differences in the USB network and proceeds to query enumerate the modem for type vendor functionality and bandwidth required Flashing Orange The modem has enumerated with the PC This means that the operating system running on the PC has recognized the modem CICER The modem s software has established communications with the 3Com USB driver software running on the PC isse neon si modem is working and data is present on the USB ADSL Status lof No ADSL No ADSL signal has been detected No ADSL signal has been detected been detected The modem is attempting to synchronize with the DSL Flashing Orange P service provider s equipment CS The link has been established between your modem and the DSL service provider s equipment Flashing Green Flashing Green The link is up and there is data on the ADSL port link is up and there is data on the ADSL The link is up and there is data on the ADSL port Orange Troubleshooting Tools TOP The 3Com HomeConnect ADSL Modem Dual Link has a number of features which can be used to help troubleshoot problems The Dual Link Manager has several important diagnostic tools On the Dual Link Manager Summary Page you can see your ADSL line status whether the line is up or down In the Dual Link Manager Systems Page area Diagnostics includes a number of statistics that your service p
30. es Anche 159 Ep If you look at the drop down menu for Available Services on the Dual Link Manager Services screen you will now see the new service listed as available Click Finished Close the browser and open the Dialer by clicking Start gt Programs gt Dual Link Modem gt Dialer E Profiles ADSL Modem Dual Link Fie Edt View Connections Help oR ae Profiles B ai a Double click on an icon to Create New ISP Another_ISP make a connection or double Profile click on Create New Profile to create a new Profile The new service now appears in the Dialer Profiles window and if you wish you can click and drag a copy of it to your desktop for easy access Remember that the very first time you access the new ISP you will need to have the username and password which you received from your service provider PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS DUAL LINK USER S GUIDE The Dual Link is a flexible connection The Dual Link is a flexible connection for LAN and WAN The WAN interface connects your home to the phone company or service provider network The interface is the Asymmetric Digital Subscriber Line ADSL port on the back of your modem The LAN interface attaches to the PC s you have in your home It is accessible through the Ethernet 10Base T port and the Universal Serial Bus USB port The HomeConnect ADSL Modem Dual
31. fined to a single building or group of buildings However one LAN can be connected to other LANs over any distance via telephone lines and radio waves A system of LANs connected in this way is called a wide area network WAN Computers connected to a LAN are able to share not only data but also expensive devices such as laser printers and scanners Ethernet LANs are most common for PCs Data transmission is very fast on a LAN but the distances and numbers of computers that can be connected are limited LED light emitting diode An electronic device or signal that lights up when electricity is passed through it Your Dual Link modem uses LEDs to indicate the status of important operations Modem modulator demodulator A modem is a device or program that enables a computer to transmit data over telephone lines The modem converts data which is stored digitally in the computer to analog data which is required for transmission over telephone lines and vice versa Simply stated digital data is based on discrete on off switching 1 and 0 whereas analog data consists of infinitely variable data such as sound waves Nac file A Nac file is a file with the extension nac The file extension was coined by U S Robotics from the words Network Application Code or Network Application Card It contains information essential to network communications and resides in the Flash memory of your modem Dual Link If you choose to install the
32. g tab if you think there may be an updated file available you can select Update Now Click Close to exit the Instant Update configuration screen 17 Instant Update Dual Link Please wait for the following number ol days to pass before looking for a new version of this product po y Previous Update Newt Update Tuesday March 14 2000 Thursday Apel 13 2000 Update Now E cos Updating your modem software TOP Once the Instant Update Utility has been installed on your PC it will monitor the Internet for updates to the basic operating software called a nac file for your Dual Link Modem and download an update file when one is found This file will be downloaded to your PC and stored in a folder on your hard drive By default the file location is C Program Files 3Com Dlcc Update You can then download it to your Dual Link at your convenience 3 5 As ES Memet Explorer z3 sue A windows NT Exptorer f5 3Com Dual Link Modem 4 5 Advanced 3 Administrative Took Commorj gt Pa Dialer 3 lomega Tools for windows NT i Modem Settings hy Shut Down E Microsoft intenet Server Common gt 4 Online Mental om B Se To retrieve a downloaded nac file and install it on your Dual Link first open your Dual Link Modem Settings Screen E Com ADSL Modem Dust Link Manager Microsoft internet Explorer From the Main page select System 3 Son ADS 1 Hoden Dual Lie nk M onoge Microsoft I
33. gura el pleno cumplimiento de las normas de seguridad nacionales e internacionales En caso de no recibir un adaptador con la unidad deber utilizar un cable que responda a los requisitos estipulados por la normativa local o nacional pertinente y que no contravenga la garant a de seguridad del producto consulte la secci n relativa a este punto al final de esta gu a Desenchufe el adaptador antes de mover la unidad La nica forma de interrumpir el paso de corriente consiste en desenchufar el adaptador de la unidad o de la toma de corriente No deben conectarse a los puertos de la unidad aparatos que no cumplan los requisitos de la interfaz en uso Los puertos de la unidad son de los siguientes tipos Puertos con etiqueta XXXX o YYYY TNV TNV Telecoms Network Voltage es un circuito que en condiciones normales transmite sefiales de telecomunicaci n Puertos con etiqueta AAAA o BBBB SELV SELV Safety Extra Low Voltage es un circuito secundario disefiado para que el voltaje entre dos puntos accesibles no exceda l mites seguros 42 2 V punta 60 V CC en circunstancias normales o de fallo simple La unidad no contiene fusibles ni otros componentes que el usuario pueda cambiar o reparar De producirse problemas cuya resoluci n no se explique en esta gu a p ngase en contacto con el proveedor de 3Com Si las unidades que posee son apilables acople las que sean similares entre s ServiceConnect la conexi n de tierr
34. han one ISP You can add ISPs using information provided by your service provider The modem installation procedure you have completed installed a program group on your hard drive This program group provides shortcuts to 1 Access the modem for diagnostics monitoring your connection and upgrading your modem software For the most part you should not have to directly access your modem 2 View this online guide 3 Install the Instant Update package which allows you to automatically obtain software updates for your modem over the Internet 4 Uninstall the modem program group from your hard drive You can learn more about unfamiliar or technical terms by consulting the glossary in this guide DUAL LINK USER S GUIDE PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQs Using your Dual Link Modem The Dual Link Manager is accessed via your browser by clicking Start gt Programs gt Dual Link Modem gt Modem Settings Your browser should automatically connect to the modem and display the Dual Link Manager screen 3 om ADSL Modem Dust Link Manager Microsoit internet Explorer 3Comr HomeConnect ADSL Modem Dual Link Manager ADSL Line Up USBLAN Sarg Traffic Dual Link Software V107 Version Chipset 1 Software 141 Version i This screen contains a summary of your modem s configuration and an indication of whether the ADSL l
35. iasion Upstream Signal to Noise Ratio 608 ii LI Transmit Power 12 0 dBm Ne gotiated Downstream Baud Rate Hegoi tated U We View diagnostics in the Dual Link Manager This screen gives you information that may help solve problems should they arise The statistics on the left side of the chart give the general status of the ADSL line The right hand side provides detailed information This information may be of use if you need to talk to your DSL provider about performance ICom ADSL Modem Dual Link Manager Microsoft Internet Explorer Be d Yew Go Familie Help Loss O1 Signal Events 0 PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS I POWER LAN NOAX ACEL emus Dm CONSOLE Gag usa SWITCHES This is a representation of the back of your 3Com modem Dual Link Note the Reset button has been highlighted If you need to reset the modem s configuration unplug the modem then plug it back in while holding the reset button in for 5 seconds PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS Technical Specifications Power requirements 17 watts maximum Temperature requirements 0 50 degrees C operating 35 to 70 degrees C shipping and storage Humidity requirements 0 95 non condensing operating 0 100 non condensing shippi
36. imited rights only as provided in DFAR 252 227 7015 Nov 1995 or FAR 52 227 14 June 1987 whichever is applicable You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in or delivered to you in conjunction with this Install Guide Portions of this documentation are reproduced in whole or in part with permission from Network Telesystems Inc NTS Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com the 3Com logo and HomeConnect ADSL Modem Dual Link are registered trademarks of 3Com Corporation 3ComFacts is a service mark of 3Com Corporation Acrobat and Acrobat Reader are trademarks of Adobe Artisoft and LANtastic are registered trademarks of Artisoft Inc Banyan and VINES are registered trademarks of Banyan Systems Incorporated CompuServe is a registered trademark of CompuServe Inc DEC and PATHWORKS are registered trademarks of Digital Equipment Corporation Intel and Pentium are registered trademarks of Intel Corporation AIX AT IBM NetView and OS 2 are registered trademarks and Warp is a trademark of International Business Machines Corporation Internet Explorer Microsoft MS DOS Windows Windows 95 and Windows NT are registered trademarks of Microsoft Corporation Novell and NetWare are registered trademarks of Novell Inc PictureTel is a registered trademark of
37. ine is operational Besides the summary the Dual Link Manager provides two selections System and Services System settings allow you to monitor the modem and update its software Service settings allow you to monitor your connection to the Internet DUAL LINK USER S GUIDE PPP Mode Getting Started Advanced Procedures Using your modem Advanced Operations General Information a reall rear Unizi PEL tC itol 8 Troubleshooting Xp ica Mad Vik FAQs From your Start button proceed as follows Start gt Programs gt 3Com Dual Link Modem gt Advanced and select one of the options given e Install Instant Update e Serial Download e Uninstall Modem Utilities DUAL LINK USER S GUIDE PPP Mode Getting Started General Information Using your modem The information provided in these pages covers points of interest and information that you don t need to know to operate your modem under normal circumstances but that Advanced might be of use or interest to you Operations e Specifications 3Com Corporation Limited Warranty General Information e Safety Information e Technical Support Troubleshooting e Glossary of Terms FAQs e Manufacturer s Declaration of Conformity e e Copyright Information ADSL Dual Link Moders Power Cord and Ad apter PPP Mode Home DUAL LINK USER S GUIDE Troubleshooting Here you will find troubleshooting tools and information for your 3Com H
38. ing interference that may cause undesired operation WARNING This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules and the Canadian Department of Communications Equipment Standards entitled Digital Apparatus ICES 003 These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from the one which the receiver is connected to Consult the dealer or an experienced radio TV technician for help The user may find the following booklet prepared by the Federal Communications Commission helpful The Interference Handbook This booklet is available from the U S Government Printing Office Washington D C 20402 Stock No 0
39. ink unit you must first establish a Control Center connection to the Dual Link unit Double click 3Com Dual Link Control Center icon on your desktop Then click the Dual Link Manager icon to launch a browser and bring up the Dual Link Manager ADSL Connection Problems TOP Symptoms Possible Cause Corrective Action ADSL LED is blinking The ADSL modem cable is not Check that one end of the ADSL orange connected This is the RJ11 cable is fully plugged into your cable that plugs into your DSL enabled wall plug Check ADSL enabled jack that the other end is fully Manager Summary plugged into the ADSL port in confirms that the ADSL the back of your modem status is down The ADSL cable has been Replace the ADSL cable The Dual Link Control damaged Manager gt System gt The ADSL cable wiring inner The Dual Link Control Make sure it is set as specified Diagnostics shows that pair versus outer pair is not set by your service provider or use there is a loss of signal correctly the Auto Detect setting to allow error the modem to select the correct pair There is a problem at the other end of the ADSL connection that causes the ADSL negotiation to fail The ADSL cable wiring inner Contact your service provider My ADSL link is not Make sure it is set as specified stable goes up and down pair versus outer pair is not set by your service provider or use a
40. k Press the switch in to connect to a of the modem is set to connect hub and out to connect to a PC to a single PC but the cable is connected to a hub or vice versa The LAN cable has been Replace the cable with another LAN damaged cable USB Connection Problems TOP Symptoms Possible Cause Corrective Action My Windows based PC did not The modem is not Plug in the modem and allow it automatically detect the modem powered on enough time to complete the when I plugged in the USB cable boot process Status LED goes for the first time off The USB LED on the modem is There s a USB Check that one end of the USB Off connection problem cable is fully plugged into the USB port on the modem and the other end is fully plugged into the PC s USB port The USB cable has Replace the USB cable been damaged Although your PC has a If you are running Microsoft USB port the operating Windows 3 1 Windows 95 or system that is running Windows NT you will need to on your system does upgrade your operating system not support its use to Windows 98 or Windows 2000 The USB port on your PC is not enabled Verify that the USB port is enabled by running the PC s Setup program typically the F1 or Delete key at boot Refer to your computer manufacturer s documentation if you are having trouble running the Setup program or cannot find the USB Configuration Settings section
41. l Link unit to a Com port on your PC using a DB 9 to DB 9 cable Once this is done click Start gt Programs gt 3Com Dual Link Modem gt Advanced gt Serial Download to start the serial download You will see the following screen Serial Download Manage ona 115200 You will be asked to input the Com port and baud rate Once you click OK an instruction screen will open up similar to that shown here w dela El ea A The serial port download is ready to proceed Please do the following 1 Turn OFF Cunplug gt the Dual Link unit 2 Press return to start the download 3 Turn ON the Dual Link unit Press any key to continue It will direct you to 1 Turn OFF unplug the Dual Link unit 2 Press Return to start the download 3 Turn on the Dual Link unit This will write the new nac file onto the Dual Link TOP PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQs DUAL LINK USER S GUIDE To uninstall your modem If you need to uninstall the Dual Link modem use the Uninstall utility shown in the Dual Link Manager Before the uninstall procedure begins you will receive the following warning Confirm File Deletion 2 Are you sure you went lo completely remove Dual Link Modem and af of its components PPP Mode Getting Started Using your modem Advanced Operations General Information Troublesh
42. mation through a variety of services This section describes these services Information contained in this section is correct at time of publication For the most recent information 3Com recommends that you access the 3Com Corporation World Wide Web site Technical Support Technical Support Hotline Technical questions about the 3Com HomeConnect ADSL Modem Dual Link can be answered by technical support representatives Regular long distance charges will apply if you are outside the 847 area code The hours service is available are 7 00 am 8 00 pm CST Monday through Friday and 7 00 am 4 00 pm CST on Saturday Dial the following number 847 262 3700 Online Technical Support 3Com offers product support 24 hours a day 7 days a week through consumer 3com com dsl World Wide You can send a message to technical support by Web selecting Contact Us from the Site Tools section on the Web site 3Com BBS 847 262 6000 If You Need to Return the Modem to Us Contact 3Com Customer Support If the support representative determines that you need to return the modem you will receive an USO User Service Order number You must have a USO number before returning the modem to us Ship the unit postage paid in a strong box made of corrugated cardboard with plenty of packing material DO NOT send the modem back in the original box Send ONLY the modem NOT manuals diskettes etc Include your USO number name and address on the shipping l
43. ment in the United States RJ 11 connectors are also used to connect some types of local area networks LANs although RJ 45 connectors are more common RJ 45 Jack Short for Registered Jack 45 an eight wire connector used commonly to connect computers onto local area networks LANs especially Ethernets RJ 45 connectors look similar to the ubiquitous RJ 11 connectors used for connecting telephone equipment but they are somewhat wider SDSL symmetric digital subscriber line SDSL is called symmetric because it supports the same data rates for upstream and downstream traffic A similar technology that supports different data rates for upstream and downstream data is called asymmetric digital subscriber line ADSL ADSL is more popular in North America whereas SDSL is being developed primarily in Europe TCP Transmission Control Protocol TCP is one of the main protocols in TCP IP networks Whereas the IP protocol deals only with packets TCP enables two hosts to establish a connection and exchange streams of data TCP guarantees delivery of data and also guarantees that packets will be delivered in the same order in which they were sent TCP IP Transmission Control Protocol Internet Protocol The communications protocols used to connect hosts on the Internet TCP IP is built into the UNIX operating system and is used by the Internet making it the de facto standard for transmitting data over networks Even network operating systems
44. mmun Explorer 3Conr HomeConnect ADSL Modem Dual Link Manager System Maintenance System Parameters Traffic Sharing Allow traffic between USB Workstation and LAN Vez ADSL Wire Palr EU dan eee inner Peir SuberitChonges Fished a TRE Under the category System Maintenance click on Upgrade Software Com ADSL Moden Dual Link Manager Microsoft intimin Explorer 3ConrHomeConnect ADSL Modem Qual Link Manager You need a fle 10 upgrade tre Dual Link s sofwsee The file rame is Mus number mac cmmben n the software wesson Your original nac flo is om the Dual Link CD Update nac flez wil be automatically sont lo you if you use 3Com s Instan Update program for Windows also on the CO Ahemstively updates are avalable from 3Com Technical Suppor Browser Hint Look in defaut directory Program Files 3ComDLOCWisdale for fie arte nac Download Sotware Caution Mer starting the download rernsin on this screen until the download completes stout t ernste Browse to find the location of the nac file on your hard drive By default the file is usually stored in C Program Files 3Com Dlcc Update Then click Download Software After starting the download remain on the screen until the download completes about one minute Serial download TOP This is not the preferred method but we ve documented it here in case you need to use it This procedure requires that you first connect your Dua
45. modem to store information about connections over the ADSL line The installation procedure for your modem automatically stores the configuration information for your connections into one or more service profiles Normally there is a single profile that is called ISP Typically you will not need to access the profiles directly 3 Moa ADSL Moden Dual Link Manager Microsoft Aminen Explorar No x Ele Ed Yew Go Faves Heb EI Actes E tts diri conviene lect 3Com HomeConnect ADSL Modem Dual Link Manager To view delete or ser throughput stalistics for an existing serece select that serce from the bat menu then select the Display Selected Senece button To create a new senice select Ihe Add New Sornce button Available Services FFF DispisySoloctedSenico AddNowSonice For more information see the following topics e Display Selected Service e Add New Service PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQs DUAL LINK USER S GUIDE Monitoring Services The Display Selected Service function shows you statistics for the service you selected and gives you the opportunity if this service was set up by mistake or is no longer your service provider to delete the entry Deleting services manually from this page is not recommended If you need to reinstall your modem we would suggest uninstalling the software from your PC and
46. nager FAQs Warning If you reboot the modem all currortty active services including this connection will be cropped After reboot you can reestablsh the connections Reboot lakes about 1 minute Reboot Cancel Rebooting should be done with caution DUAL LINK USER S GUIDE PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQs Reset the ADSL Line If you click the Reset button you will see a message warning you that if you reset the ADSL line all currently active services will be dropped While this allows you to reset the ADSL line connection you should rarely ever have to use this function If your ADSL line is not functioning properly you could use this function to require that the modem relearn the connection 3 3000 ADSL Modem Duel Link Manager Hiciozoft Inimnel Explorer seas 8 botox Hmm dadini coris ai reet 3Comr HomeConnect ADSL Modem Dual Link Manager Ju Reselling the ADSL line casses the modem to ranegotiata the ADSL level connection Warning If you reset the fne al currently active series wil be dropped PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS DUAL LINK USER S GUIDE Managing Service Profiles The Services screen allows you to create view monitor and delete service profiles Service profiles are used by the
47. nfiguration Protocol This allows a device to have a different IP address every time it connects to the network or in some cases to change while it is still connected The software keeps track of IP addresses This allows a new computer to be added to a network without having to manually assign it a unique IP address DIP switch A series of tiny switches built into circuit boards DIP switches let you configure a circuit board to conform to a particular application In the case of your Dual Link modem the DIP switch is reserved and all toggle switches should be left in the Off position DSL Digital Subscriber Line The two main categories of DSL currently are the ADSL Asynchronous DSL and SDSL Synchronous DSL DSL technologies pack data onto copper wires They are used for connections from a telephone switching station to a home or office not between switching stations DSL is similar to ISDN in that both operate over existing copper telephone lines POTS and both require the short runs to a central telephone office usually less than 20 000 feet But DSL offers much higher speeds Encapsulation In networking encapsulation means wrapping a data set in a protocol header This allows one network to send its data via another network s connections Ethernet Ethernet is a LAN local area network protocol that was developed by Xerox Corporation in cooperation with DEC and Intel in 1976 It is one of the most widely implemented
48. ng and storage MTBF Mean Time Between Failures 65 000 hours Jacks The HomeConnect ADSL Modem Dual Link has one RJ 11 jack for the ADSL Modem one RJ 45 jack for the LAN interface one Type B jack for the USB interface one DB 9 jack for the console interface and one DC jack ADSL Interface one RJ 11 jack Inner Pair Pin 1 Not Connected NC Pin 2 Not used Pin 3 Ring Pin 4 Tip Pin 5 Not used Pin 6 NC Outer Pair Pin 1 NC Pin 2 Ring Pin 3 Not used Pin 4 Not used Pin 5 Tip Pin 6 NC LAN Interface one RJ 45 jack Pin 1 Transmit Data Pin 2 Transmit Data Pin 3 Receive Data Pin 4 NC Pin 5 NC Pin 6 Receive Data Pin 7 NC Pin 8 NC USB Interface one Type B Jack Pin 1 5V Pin 2 Data Pin 3 Data Pin 4 Ground Console Interface DB 9 Default configured as DCE Pin 1 DCD LL lt PC Pin 2 Transmit Data LL gt PC Pin 3 Receive Data LL lt PC Pin 4 DTR LL lt PC Pin 5 Ground Pin 6 DSR LL gt PC Pin 7 RTS LL lt PC Pin 8 CTS LL gt PC Pin 9 RILL gt PC PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS DUAL LINK USER S GUIDE In German In French In Spanish Safety Information When using the unit observe the following safety information Retain this User s Guide for later use and pass it on to subsequent owners managers of the unit
49. nia 95052 8145 Copyright 2000 3Com Corporation All rights reserved No part of this documentation may be reproduced in any form or by any means or used to make any derivative work such as translation transformation or adaptation without written permission from 3Com Corporation 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change 3Com Corporation provides this documentation without warranty of any kind either implied or expressed including but not limited to the implied warranties of merchantability and fitness for a particular purpose 3Com may make improvements or changes in the product s and or the program s described in this documentation at any time UNITED STATES GOVERNMENT LEGENDS If you are a United States government agency then this documentation and the software described herein are provided to you subject to the following United States Government Legend All technical data and computer software is commercial in nature and developed solely at private expense Software is delivered as Commercial Computer Software as defined in DFARS 252 227 7014 June 1995 or as a commercial item as defined in FAR 2 101 a and as such is provided with only such rights as are provided in 3Com s standard commercial license for the Software Technical data is provided with l
50. nnection Time jo 00 00 15 Activity Tx Bytes 2 1K 0 0Kbps Frames 30 nn Rx Bytes 823 0 0Kbps Frames 18 m Disconnect Details gt gt To disconnect right click on the tray icon and click on Disconnect The following screen is displayed allowing you to reconnect immediately if you wish More connected r User Information U ser N ame user 3 31 o OC al Password v Save password r Messages user331 local successfully disconnected from 3 ea Even though the Broadband Dialer can be installed on several PCs only one at a time can use the modem to connect to the same Internet connection You will have to hang up the connection from one PC before attempting to make the connection from another PC The ISP Profile icon can be moved from the Dialer window to your Windows Desktop To do this grab the icon using a left click and then drag it to the Desktop CA Profiles ADSL Modem Dual Link Fie Edt View Connections Help t Create New Pictle Profiles Double click on an icon to make a connection or double click on Create New Profile to create a new Profile PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS DUAL LINK USER S GUIDE hip An das con sys edil stat 3ConrHomeConnect ADSL Modem Dual Link Manager Operational Mode Upstream Anom
51. no le seguenti Porte contrassegnate dalle targhette XXXX e YYYY TNV TNV Telecoms Network Voltage un circuito che in normali condizioni di esercizio trasmette segnali di telecomunicazione Porte contrassegnate dalle targhette AAA A e BBBB SELV SELV Safety Extra Low Voltage un circuito secondario ideato e protetto in modo tale che in condizioni normali e in caso di un unico guasto la tensione tra due parti accessibili qualsiasi non superi il valore di sicurezza 42 2 V picco o 60 V CC All interno dell unit non vi sono fusibili sostituibili dall utente o parti la cui manutenzione pu essere effettuata dall utente Se si verifica un problema che non si in grado di risolvere seguendo le istruzioni per la risoluzione dei problemi riportate nel presente manuale contattare il rivenditore 3Com presso il quale si acquistata l unit Se le unit sono impilabili impilare solamente unit simili Solo per ServiceConnect collegare il filo di massa di sicurezza in posizione centrale sulla base dell unit rack ServiceConnect 2000 AVVERTENZA porte dati RJ45 per doppino intrecciato Si tratta di prese dati RJ45 schermate e non possono essere utilizzate come prese telefoniche Collegare solamente connettori dati RJ45 a queste porte PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS TECHNICAL SUPPORT 3Com provides easy access to technical support infor
52. nt will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissible to be connected to the facilities of the local telecommunications company The equipment must also be installed using an acceptable method of connection In some cases the company s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly telephone extension cord The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations Currently telecommunication companies do not allow users to connect their equipment to jacks except in precise situations that are spelled out in tariffing arrangements with those companies Repairs to certified equipment should be coordinated by a representative designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment For your own protection make sure that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas CAUTION Do NOT attempt to make such connections yourself Instead contact an electric inspection authority or electrician as appropriate WARRANTY AND
53. ntact your 3Com reseller Do not push any objects into the openings of the unit Doing so can cause fire or electric shock by shorting out internal components Ensure nothing rests on the unit s system cables and that the cables are not located where they can be stepped on and cause damage to the unit Keep the unit away from radiators and heat sources Allow 25 mm 1 inch around the unit or stack to provide adequate air circulation Install the unit in a clean area that is free from dust or extreme temperatures The Dual Link has been designed to be a free standing unit Do not place anything else on top of the unit s case Allow a clearance gap of at least 50 mm 2 in from the rear panel of the unit to allow for cable access Normal operations of this unit could be interrupted by a lightning surge In this event the user must recycle the power to the unit in order to establish normal operating conditions Important Safety Information WARNING Warnings contain directions that you must follow for your personal safety Follow all instructions carefully Please read the following information carefully and thoroughly before installing the unit Take exceptional care during the installation and removal of the unit Locate the unit close to the main socket outlet and ensure that the main socket is accessible Use the power adapter supplied with the unit to ensure compliance with national and international safety standards Refer
54. ology based on transferring data in small cells or packets of a fixed size The small cell size allows ATM equipment to transmit video audio and computer data over the same network without any type of data consuming the entire capacity of the line ATM differs from TCP IP where message packets take different routes from source to endpoint ATM defines connections by two main parameters Virtual Path Identifier VPI and Virtual Channel Identifier VCI VPI and VCI are defined in this Glossary Your service provider will tell you what VPI and VCI values you must use in your Dual Link in order to properly connect to their service Bridging Bridged In networking bridging is the process of moving a packet or piece of data from source to destination A bridge is a mechanism which forwards packets between different networks based on hardware level addresses Your HomeConnect modem automatically maintains a forwarding table that contains information needed to correctly route data so you don t need to manually add or delete entries as your home network configuration changes Connector or Jack The part of a cable that plugs into a port or interface to connect one device to another Console Port The console port on your Dual Link can be matched to the Com port Com1 Com2 on your computer using the DB 9 serial cable provided On the ADSL Modem Dual Link it is typically used only in the case of disaster recovery DHCP Dynamic Host Co
55. omeConnect ADSL Modem Dual Link o LED Status Indicator Diagnostics o Troubleshooting Tools o Troubleshooting Tables m Power Problems LAN Connection Problems USB Connection Problems Control Center Connection Problems Dual Link Manager Web Browser Connection Problems ADSL Connection Problems Slow Network response LED Status Indicator Diagnostics TOP Alert Of Themodemis operating properly modem is operating The modem is operating properly Lie On ee me boot the modem is checking for the download EE of new software This lasts for about 4 seconds CER While the modem is initializing This lasts for 30 to 40 S Y seconds after booting the modem The reset button is being held in and the modem has just been powered on This lets you know that the modem has recognized the reset request It lasts for about 4 seconds An unexpected error has occurred but it does not affect Orange the operation of the modem A non recoverable error has occurred If this happens the modem will automatically reboot Power Green Power is on LAN Status Off No Ethernet signal has been detected Flashing Green rapidly Green A PC or hub is properly connected to the Ethernet port 4 A i i is present on th bin Crean proper connection exists and data is present on the Ethernet port USB Status Off No USB signal has been detected A PC is properly connected to the USB port but the modem has not enumerat
56. ooting FAQs DUAL LINK USER S GUIDE Starting your Dual Link Manager To start the Dual Link Manager go to the Start button on the lower left side of your screen Select Modem Settings to enter the Dual Link Manager ET Advanced Accessories gt Pa Dialer x Favorites gt Internet Explorer Mod em Settings a Online Services Online Manual gt StartUp LES winzip gt HS MS DOS Prompt A Ay Windows Explorer m Programs Ra Shut Down iis B e 2 If on the other hand you want to use your modem to connect to your Internet service provider click on the Dialer or if you have previously placed a shortcut for the ISP profile on your desktop just double click on that CA Profiles ADSL Modem Dual Link Fie Edi View Connections Help EN NEAN E ES Profiles B af Double click on an icon to Create New Ea make a connection or double Profle click on Create New Profile to create a new Profile DUAL LINK USER S GUIDE PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQs System Maintenance of the Dual Link Modem The System Maintenance area allows you to monitor the modem and update its software 3 3Cnm ADSL Modem Dual Link Manager Microsoft mune Explorar A Ele EG Yew Go Favole Heb hip diva dualini conis mod y 3ComrHomeConnect ADSL Modem Dual Link Manager Reboot Upgrade Sotware
57. ot be responsible for any software firmware information or memory data of Customer contained in stored on or integrated with any products returned to 3Com for repair whether under warranty or not Dead or Defective on Arrival In the event a product completely fails to function or exhibits a defect in materials or workmanship within the first forty eight 48 hours of installation but no later than thirty 30 days after the date of purchase and this is verified by 3Com it will be considered dead or defective on arrival DOA and a replacement shall be provided by advance replacement The replacement product will normally be shipped not later than three 3 business days after 3Com s verification of the DOA product but may be delayed due to export or import procedures The shipment of advance replacement products is subject to local legal requirements and may not be available in all locations When an advance replacement is provided and Customer fails to return the original product to 3Com within fifteen 15 days after shipment of the replacement 3Com will charge Customer for the replacement product at list price WARRANTIES EXCLUSIVE IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE CUSTOMER S SOLE REMEDY FOR BREACH OF THAT WARRANTY SHALL BE REPAIR REPLACEMENT OR REFUND OF THE PURCHASE PRICE PAID AT 3COM S OPTION TO THE FULL EXTENT ALLOWED BY LAW THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OT
58. r choose the destination directory Choose Destination Location X Setup will install Instant Update in the following folder To install to this folder click Next Tomaia A RATE Gs een You can choose not to install Instant Update by clicking Cancel to ext Setup Destination Folder C Program Files 3Com instant Update Browse lt Back Next gt Cancel And given the opportunity to change the program folder name Select Program Folder Ea Setup wil add program icons to the Program Folder listed below You may type a new folder name or select one from the existing Folders list Click Next to continue Program Folders Existing Folders 3Com Dual Link Modem ICom NIC Ublities Accessones Intemet Explorer Online Services StadUp WinZip WS_FTP Pro lt Back Next gt Cancel Click Finish to complete the setup of the utility Selup Complete Configuring the Instant Update Utility TOP There is one last step that you will want to complete in order to have full control over the Utility From the Start button select Start gt Programs gt Instant Update gt Instant Update Configuration I Suc Update Conf guratior This gives you a series of screens that allow you to control the operation and frequency of the Instant Update By default the Instant Update will check for code updates from the 3Com web site every 30 days You may not wish to change the defaults On the schedulin
59. re replaced will become the property of 3Com Replacement products may be new or reconditioned 3Com warrants any replaced or repaired product or part for ninety 90 days from shipment or the remainder of the initial warranty period whichever is longer SOFTWARE 3Com warrants to Customer that each software program licensed from it will perform in substantial conformance to its program specifications for a period of ninety 90 days from the date of purchase from 3Com or its authorized reseller 3Com warrants the media containing software against failure during the warranty period No updates are provided 3Com s sole obligation under this express warranty shall be at 3Com s option and expense to refund the purchase price paid by Customer for any defective software product or to replace any defective media with software which substantially conforms to applicable 3Com published specifications Customer assumes responsibility for the selection of the appropriate applications program and associated reference materials 3Com makes no warranty or representation that its software products will meet Customer s requirements or work in combination with any hardware or applications software products provided by third parties that the operation of the software products will be uninterrupted or error free or that all defects in the software products will be corrected For any third party products listed in the 3Com software product documentation or specific
60. rovider would find useful if they were trying to fix an ADSL line problem In the Dual Link Manager you also have the ability to reset the ADSL port This renegotiates the ADSL level connection Troubleshooting Tables TOP The troubleshooting tables are organized so that potential hardware and line problems are presented first followed by higher level configuration problems How to Use these Tables If you are having any type of connection problem e g the workstations on the local LAN cannot connect to the remote network you should work your way down the tables to eliminate any low level problem before working through the WAN connection problems Power Problems TOP Symptoms Possible Cause Corrective Action The LAN LED is Off The LAN cable is not connected Check that one end of the LAN cable is fully plugged into the LAN port on your modem and the other end is fully plugged into the local LAN connection The MDI X switch on the back Press the switch in to connect to a of the modem is set to connect hub and out to connect to a PC to a single PC but the cable is connected to a hub or vice versa LAN Connection Problems TOP Symptoms Possible Cause Corrective Action The LAN LED is Off The LAN cable is not connected Check that one end of the LAN cable is fully plugged into the LAN port on your modem and the other end is fully plugged into the local LAN connection The MDI X switch on the bac
61. sinformationen WARNUNG Warnungen enthalten Anweisungen die Sie zu Ihrer pers nlichen Sicherheit befolgen m ssen Bitte halten Sie sich daran Bitte lesen Sie die folgenden Informationen aufmerksam ehe Sie die Einheit installieren Lassen Sie bei Installation und Abbau besondere Vorsicht walten Stellen Sie die Einheit in der N he einer Stromquelle auf und achten Sie darauf da diese zug nglich ist Verwenden Sie immer den mitgelieferten Netzadapter damit die Einhaltung nationaler und internationaler Sicherheitsnormen gew hrleistet ist Wurde kein Adapter mitgeliefert mu das verwendete Netzkabel den lokalen und nationalen Bestimmungen des Landes entsprechen und darf die Sicherheitsbestimmungen des Produkts siehe den entsprechenden Abschnitt am Ende dieses Handbuchs nicht verletzen Trennen Sie den Netzadapter von der Stromversorgung bevor Sie die Einheit bewegen Die Einheit kann nur von der Stromversorgung getrennt werden indem Sie die Verbindung des Netzadapters entweder von Einheit oder der Stromquelle trennen Schlie en Sie nur Ger te an den Schnittstellen dieser Einheit an die den Interface Voraussetzungen entsprechen Die Sicherheitsmerkmale der Schnittstellen dieses Ger ts sind Schnittstellen mit der Bezeichnung XXXX und YYYY TNV TNV Telecoms Network Voltage ist ein Schaltkreis auf dem unter normalen Betriebsbedingungen Telekommunikationssignale bertragen werden Schnittstellen mit der Bezeichnung AAA
62. st particuli rement importante dans les r gions rurales Avertissment L utilisateur ne doit pas tenter de faire ces raccordements luim me il doit avoir recours un service d inspection des installations lectriques ou 4 un lectricien selon le cas Centre de guarantie et de service apr s vente Keating Technologies 25 Royal Crest Court Suite 200 Markham ONT L3R 9X4 PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS 3Com Corporation Limited Warranty This warranty applies to customers located in the United States Australia Canada except Quebec Ireland New Zealand U K and other English language countries and countries for which a translation into the local language is not provided HARDWARE 3Com warrants to the end user Customer that this hardware product will be free from defects in workmanship and materials under normal use and service for the following length of time from the date of purchase from 3Com or its authorized reseller Five 5 years 3Com s sole obligation under this express warranty shall be at 3Com s option and expense to repair the defective product or part deliver to Customer an equivalent product or part to replace the defective item or if neither of the two foregoing options is reasonably available 3Com may in its sole discretion refund to Customer the purchase price paid for the defective product All products that a
63. te la dur e de l installation et du d placement de l appareil Placez l appareil pr s d une prise murale qui doit rester accessible tout instant Utilisez l adaptateur lectrique fourni avec l appareil pour garantir la conformit totale aux normes de s curit nationales et internationales Si aucun adaptateur n est fourni le c ble lectrique utilis doit tre conforme aux normes locales et nationales du pays et ne doit en aucun cas contrevenir aux normes de s curit d utilisation de l appareil veuillez consulter la section Approvals Agr ments au dos du pr sent manuel D connectez l adaptateur lectrique avant de d placer l appareil L alimentation ne peut tre d connect e de l appareil qu en retirant l adaptateur de l appareil ou de la prise de courant Ne connectez l appareil qu en conformit avec les exigences techniques des ports de connexion de l appareil Les normes de s curit de chaque port sont les suivantes Les ports identifi s par les tiquettes XXXX et YYYY TNV Les circuits TNV Telecoms Network Voltage tension du r seau de t l communications sont des circuits qui en condition normale d utilisation transportent les signaux de t l communication Les ports identifi s par les tiquettes AAAA et BBBB SELV Les circuits SELV Safety Extra Low Voltage tr s basse tension de s curit sont des circuits secondaires qui sont con us et prot g s pour qu en conditions normales et d f
64. that have their own protocols support TCP IP Telecommuting A term coined in the early 1970s to describe a geographically dispersed office where workers can work at home on a computer and transmit data and documents to a central office via telephone lines USB Universal Serial Bus A new external bus standard that supports very fast data transfer rates A single USB port can be used to connect up to 127 peripheral devices Manufacturers are including USB ports in more and more new computers VCI Virtual Circuit Identifier A virtual circuit is a connection between two devices that acts as though it s a direct connection even though it may physically be circuitous The term is used most frequently to describe connections between two hosts in a packet switching network The two hosts can communicate as though they have a dedicated connection even though the packets might actually travel very different routes before arriving at their destination VPI Virtual Path Identifier Virtual path refers in networking to the location of a file or directory on a server being accessed remotely via the Web The VPI is the address of the file WAN Wide Area Network A computer network that spans a relatively large geographical area Typically a WAN consists of two or more local area networks LANs Computers connected to a wide area network are often connected through public networks such as the telephone system They can also be connected
65. to the Conformity statement for more details Disconnect the power adapter before moving the unit Power can only be disconnected from the unit by removing the power adapter from the unit or from the socket outlet Only connect apparatus complying with the relevant interface requirements to the ports on this unit The safety status of the ports on this equipment are as follows Ports identified by the labels XXXX and YYYY TNV TNV Telecoms Network Voltage is a circuit which under normal operating conditions carries telecommunication signals Ports identified by the labels AAAA and BBBB SELV SELV Safety Extra Low Voltage is a secondary circuit which is designed and protected so that under normal and single fault conditions the voltage between any two accessible parts does not exceed a safe value 42 2 V peak or 60 V DC There are no user replaceable fuses or user serviceable parts inside the unit If there is a physical problem with the unit that cannot be solved with problem solving actions in this guide contact the 3Com reseller from whom the equipment was purchased If the units are stackable only stack similar units WARNING Twisted Pair RJ45 data ports These are shielded RJ45 data sockets They cannot be used as telephone sockets Only connect RJ45 data connectors to these ports PPP Mode Getting Started Using your modem Advanced Operations General Information Troubleshooting FAQS Wichtige Sicherheit

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