Manuel d'utilisation / d'entretien du produit 821 du fabricant Lancom Systems
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LANC OM 821 ADSL/ISDN – LA NCOM 1621 ADSL/ISDN – LANC OM 1711 VPN.
© 2005 LANCOM Systems GmbH, Wuersele n (Germany). All rights re served. While the informat ion in this manual has been compi led with great care , it may not be deemed an assuran ce of product characteristics. LANCOM System s shal l be liable only to the d egree specified in the t erms of sale and delivery .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Preface 3 EN Pr eface Thank you for placing your trust in this LANCOM product. With the LANCOM you have chosen a powerful router that possesses inte- grated DSL respectively ADSL and ISDN interfaces by default as well as an integrated 4- port switch.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Preface 4 EN Virtual Local Net works (VLAN) Wireless networks (WLAN) LANCAPI Further server services (DHC P , DNS.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Preface 5 EN contact information for LANCOM Systems support can be found on a separate insert, or at the LANCOM S ystems website. Notes symbo ls V ery important instructions. If not f ollowed, damage may result.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Contents 6 EN Contents 1 Introduction 9 1.1 How does ADSL work? 9 1.2 Which use does VPN offer? 12 1.3 Firewall 15 1.4 What does a router do? 16 1.4.1 Bridgehead to th e WAN 17 1.4.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Contents 7 EN 4.2 Instructions for WEBconfig 45 5 Linking two networks 46 5.1 What information is necessary? 47 5.1.1 General information 47 5.1.2 Settings for th e TCP/IP router 49 5.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Contents 8 EN 8.3 The security checklist 68 9 Troubleshooting 71 9.1 No WAN connection is established 71 9.2 DSL data transfer is slow 71 9.3 Unwanted connections under Windows XP 72 9.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 1: Intr oduction 9 EN 1I n t r o d u c t i o n The models LANCOM 821 ADSL/ISD N, LANCOM 1621 ADSL/ISDN and LANCOM 1711 VP.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapte r 1: Introdu ction 10 EN Ideal for Internet surfers The ADSL versi on of DSL was designed for applications in which the user r e c e i v e s hi g h v o l um e s o f da t a b u t o nl y transmits r elatively small volumes.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 1: Intr oduction 11 EN ISDN). Other models lik e LANCOM 17 11 VPN are connected to the splitter using a separat e ADSL modem. The model LANCOM 1711 VPN can also utilize other broadband con- nections (e.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapte r 1: Introdu ction 12 EN An 'Annex A' type LANCOM can only be used wi th ADSL - over- POT S service. Similarly , an 'Annex B' device can only be used with ADSL- over- ISDN ser vice.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 1: Intr oduction 13 EN Conventional network infrastructure First, let's have a look at a typical network st ructure .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapte r 1: Introdu ction 14 EN to the original investment cos ts, ongoing costs are also incurred for the administration and maintenance of this equipment.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 1: Intr oduction 15 EN technologies such as DSL (Digi tal Subs criber Line).
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapte r 1: Introdu ction 16 EN Denial- of- Service Protection A t t a c k s f ro m t h e I n t e r n e t c a n b e b r e a k - i n a t t e m p t s a s w e l l a s a t t a c k s w i t h the aim of blocking th e accessibility and functionality of individual services.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 1: Intr oduction 17 EN Connecting a LAN to the Int ernet does not technically differ fr om coupling two LANs. The only difference is that it is not just a handful of computers behind the Internet provider's r outer .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapte r 1: Introdu ction 18 EN ac ces s to the Int ern et is re qui re d on eit her sid e of the net wor k in ter - connection. Conventional via ISDN Without VPN, a LAN to LAN interco nnection can alternatively be real- ized via ISDN.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 1: Intr oduction 19 EN LAN to LAN coupling via ISDN RAS server (via VPN) RAS server (via ISDN) IP router IPX router (via ISDN), e.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapte r 1: Introdu ction 20 EN Firewall fil ters for a selective lockin g of IP addresses, pr otocols and ports MAC addr ess filter control e.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installatio n 21 EN 2 Installation This chapter will assist you to quickly instal l hardware and software. Fi rst, check the package contents and system r equirements. The devi ce can be installed and co nfigured quickly and easily if al l prerequisites are fulfilled.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installation 22 EN The LANtools and the LANCAPI func tions also require a Windows operating system. A web browser is required for access to WEBconfig. 2.3 Introducing LANCOM This section intr oduces your device.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installatio n 23 EN T op panel Only LANCOM 821 ADSL/ISDN The two LEDs on the top panel pr ovid e a convenient ov erview of the most important status information, especially when the device is ins talled vertically .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installation 24 EN The power LED flashes red/green in alternation until a configuration password has been specified. With out a configuration passwor d, the configuration data of the LANCOM is insecure.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installatio n 25 EN ADSL Link (only LANCOM 821 ADSL/ISDN and LANCOM 1621 ADSL/ISDN) Connection status of the ADSL .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installation 26 EN ISDN status Stat us of ISDN S 0 connection: If the ISDN st atus LED goes out au tomatically , this does not indicate an S 0 bus error . Many ISDN connections and PBXs put the S 0 bus into a power- save mode after a certain time.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installatio n 27 EN Security (only LANCOM 1711 VPN) S Status of the fir ewall. Indicates the s tat us of the security settings and averted attacks to the protected network.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installation 28 EN LANCOM 1711 VPN V oltage switch Connection for the included power adapter Switch with f.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installatio n 29 EN The LAN connector identifies automatically th e transfer rate (10/100 Mbps) of the connected network device (autosensing). A parallel connec- tion of devices with differ ent speeds and types is possible.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installation 30 EN Operational? – After a short device self- test the Power LED will be per- manently lit. Green LAN LEDs indicate the LAN sockets that have function- ing connections.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 2: Installatio n 31 EN In Setup select Install LANCOM Software . The following selection menus will appear on the screen: 2.5.2 Which software should you install? LANconfig is the configur ation program for all LAN COM routers and Wireless LAN access point s.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configuration 32 EN 3 Basic configuration The basic configuration can be performed on a step- by- step basis using a convenient setup wizard to guide yo u thr ough the setu p process and prompt you for the r equired information.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configur ation 33 EN New LAN—fully automatic configuration possible If all connecte d network devices are still unconfigured, the set up wizard will suggest ful ly automatic TCP/ IP configuration.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configuration 34 EN Enable DHCP server? Disable the DHCP server function in the LANCOM if y ou would like to have a different DHCP server assign the I P addresses in your LAN.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configur ation 35 EN 3.1.5 Connect charge protection Connect char ge protec tion blocks connections that go beyond a pr eviously set amount, protecting you fr om unex pectedly high connection costs.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configuration 36 EN mask > '255 .255.255.0 '), please ensure that the IP address 'x.x.x.254' is located in your own subnet. If you have chosen automatic TCP/IP configuration, please continue with Step .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configur ation 37 EN Section ’TCP/ IP settings to workstation PC s’ auf Seit e 41 wi ll describe the settings r equired for the indivi dual workstations in the LAN.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configuration 38 EN address x.x.x.254 ( “x” stands for the first three blocks in the IP address of the configuration PC).
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configur ation 39 EN If you cannot access an un configured LANCOM, the problem may be due to the netmask of the LAN: wi th less than 254 p ossible hosts (net - mask > '255 .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configuration 40 EN If you would like to configure the TCP/IP sett ings manually , assign an available address from a suitable a ddres s range to the LANCOM. Also set whether or not it is to oper ate as a DHCP server .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configur ation 41 EN The basic setup wizard reports that all the necessary information has been provided.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 3: Basic configuration 42 EN the network configuration of the wo r kstation computers, please refer to the documentation of your operating system .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 4: Setting up Interne t access 43 EN 4 Setting up Internet access All computers in the LAN can take advant age of the centr al Internet access of the LANCOM. The connection to the Intern et provider can be established via any WAN connection.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 4: Setting up Interne t access 44 EN address), default gateway and DNS server .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 4: Setting up Interne t access 45 EN 4.1 Instructions for LANconfig Highlight the LANCOM in the se lection window . From the menu bar , select Tools Setup Wizard . From the menu, sel ect the Setup Internet access wizard and click Next .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapte r 5: Linkin g two ne tworks 46 EN 5 Linking two networks With the network interconnection (also known as LAN to LAN coupling) of the LANCOM, two local ne tworks are linked.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 5: Linking two networks 47 EN The ISDN call back function cannot be configured using the wizard. It can only be set up in the ex pert co nfiguration. F or details, please see the ref eren ce ma nua l.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapte r 5: Linkin g two ne tworks 48 EN I n c a s e y o u r d e v i c e h a s a n ISDN connection , the wizard asks whether th e remote site has ISDN as well. The type of IP address must be stated for both sides for VPN connections via the Internet.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 5: Linking two networks 49 EN The password for the ISDN connection is an alternative to the use of the ISDN caller ID. It is always used to authenticate callers that do not s e n d a n I S D N c a l l e r I D .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapte r 5: Linkin g two ne tworks 50 EN DNS access to the remote LAN Thanks to DNS, it is not only possib le to access remote c omputers in a TCP/IP network via their IP address, but al so by using fr eely defined names.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 5: Linking two networks 51 EN for the LAN of the br anch office for the high er- level W AN The IPX network numbers in the head an d br anch office s are speci fied to the resp ec tiv e rem ot e si des .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapte r 5: Linkin g two ne tworks 52 EN Remote Windows workgroups do not appear in the Win dows Network Neighbourhood, but can only be co ntacted di rectly (e. g. via Find Computers).
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 5: Linking two networks 53 EN From the main menu, launch the 'Connect two local area networks' wiz- ard. F ollow the wizard's instructions and enter the requir ed information.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 6: Providing dial- up access 54 EN 6 Pr oviding dial- up access Y our LANCOM supp orts dial- up connectio ns to permit individual computers fu ll a cc es s t o yo ur ne tw o rk .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 6: Providing dial- up access 55 EN 6.1.1 General information The following entries are required to set up a RAS connection.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 6: Providing dial- up access 56 EN 6.1.2 Settings for TCP/IP Ea ch ac ti ve R AS us er mus t be as si gne d an IP addr ess when using the TCP/IP protocol. This IP address can be permanently assi gned when setting up a user .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 6: Providing dial- up access 57 EN 6.1.3 Settings for IPX T w o IPX network num bers must be provided for remote access t.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 6: Providing dial- up access 58 EN puters in the remote network (via Find Computer s, not thr ough the Network Neighbourhood). 6.2 Settings for the dial- in compute r 6.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 6: Providing dial- up access 59 EN T erminal adapter or ISDN car d set to PPPHDL C PPP selected as the Dial- Up s.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 6: Providing dial- up access 60 EN 6.4 Instructions for WEBconfig RAS access via VPN cannot b e configured using the wizard under WEBconfig yet. It can only be set up in the expert confi guration.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 7: Sending faxes with LA NCAPI 61 EN 7 Sending faxes with LANC API LANCAPI from LANCOM is a special version of the popular CAPI interface.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 7: Sending faxes with LANCAPI 62 EN 7.1 Installation of the LANCOM CAPI fax modem Select the entry Install LANCOM software in the setup program of your LANCOM CD .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 7: Sending faxes with LA NCAPI 63 EN When the install ation was successful, the LANCOM CAPI fax modem is entered into the Phone an d Modem Optio ns of the control panel. 7.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 7: Sending faxes with LANCAPI 64 EN For checking the installation, click with the right mouse butt on on the fax- icon and select Propert ies . The LANCOM CAPI fax modem should now be entered into register 'devices'.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 7: Sending faxes with LA NCAPI 65 EN The fax client console will open. Select the menu item Send a Fax. A wiz- ard will assist you through the r emaining sending process.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 8: Security s ettings 66 EN 8 Security settings Y our LANCOM has numerous security functions. Y ou fi nd in this chapter all information you need for an optimal protection.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 8 : Security settings 67 EN In a n ex t s te p p ar am et er s o f t he co nf ig ur at io n l oc k l ik e n um be r o f f ai l ed log- in attempts and the duration of the lock can be adjusted.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 8: Security s ettings 68 EN Mark your LANCOM in the select ion window . Select from the command bar Extras Setup Wizard . Select in the select ion menu the setup wizard Configuring Firewall and confirm your choice with Next .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 8 : Security settings 69 EN Have you assigned a passwo rd for the configuration? The simplest option for the protection of the configur ation is the estab- l i sh m e n t o f a p as s wo r d .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 8: Security s ettings 70 EN individually for each route in the routing table. The routing table can be found in the LANconfig i n the 'IP router' configur ation section on the 'Routing' tab.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 9: T roubleshooting 71 EN 9T r o u b l e s h o o t i n g In this chapter , you will find suggesti ons and assistance for a few common dif- ficulties.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 9: T roubleshooting 72 EN Numerous ot her factors involving the Int ernet itself can also influence the transfer r ate.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 9: T roubleshooting 73 EN tested (e.g. “DSL1” or “LAN-1”). Pay attention to the corr ect spelling of the interfaces. Start the te st for the specified interfac e by clicking on Execute .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 10: Append ix 74 EN 10 Appendix 10.1 Performance data and specifications LANCOM 821 ADSL/ISDN LANCOM 1621 ADSL/ISDN LANCO.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 10: Appendix 75 EN Tr a n s f e r r a t e s (maximum) LAN 1 00 Mbit/s, fu ll- duplex mo de WAN Downstream 8 Mbit/s, upstr.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 10: Append ix 76 EN 10.2 Contact assignment 10.2.1 ADSL interface 6- pin RJ45 socket Options LANCOM Leased Line Option (Art.No. 00789) LANCOM VPN O ption 25 channels (max.25 simultaneous connec- tions, 50 connections configurable) for VPN in W AN (Art.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 10: Appendix 77 EN 10.2.2 Ethernet WAN interface (LANCOM 1711 VPN) 6- pin RJ45 socket 10.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 10: Append ix 78 EN 10.2.4 Ethernet interfaces 10/100Base- T 8- pin RJ45 socket, corresponding to ISO 8877, EN 60603- 7 10.2.5 Configuration interface (Outband) 8- pin mini- DIN socket 10.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 11: Index 79 EN 11 Index Numerics 10/100Base- TX 27 , 28 3- DE S 46 , 54 A Accounting 34 ADSL Connect 27 Connector cable .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 11: Index 80 EN provider 36 , 40 transfer protocol 40 DSL technologies 9 DSL transfer protocol 36 E Encryption 46 , 54 F .
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 11: Index 81 EN LAN to LAN coupling 17 , 18 , 19 , 34 , 46 Required information 47 LANCAPI 19 , 31 LANCOM setup 30 LANCOM.
LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN Chapter 11: Index 82 EN SNMP Protection of the configuration 69 Software installation 30 Splitter 10 SSID 40 Stateful Inspecti on.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté Lancom Systems 821 c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du Lancom Systems 821 - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Lancom Systems 821, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Lancom Systems 821 va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Lancom Systems 821, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du Lancom Systems 821.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le Lancom Systems 821. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Lancom Systems 821 ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
