Instruction/ maintenance manual of the product DSL-G624T D-Link
Go to page of 97
DSL-G624T Wi reless ADSL Router User ’ s Guide May 2005.
.
Table Of Contents About This Us er’s Guide ........................................................................................................ ....................................... iii BEFORE YO U START .......................................
Virtual Server ................................................................................................................. .............................................. 51 LAN Clients.............................................................
DSL-G624T Wireless A DSL Router User’s Guide About This User’s Guide This user’s gui de provides instructions on how to install the DSL- G624T Wireless ADSL Rout er and use it to provide Internet access for an Ethernet or 802.11g/802 .11b wireless LAN.
DSL-G624T Wireless A DSL Router User’s Guide Packing List Open the ship ping carton and careful ly remove all items. Make sure that y o u ha ve the items listed here . 1. One DSL-G624T 80 2.11g Wireless ADSL Ethernet Router 2. One CD-RO M containing the U ser’s Guide 3.
DSL-G624T Wireless A DSL Router User’s Guide Security for wireless communication can be accomplished in a number of ways. The DSL-G624T supports WEP, WPA and WPA -PSK. Additional Software It may be necessary to install software on your computer that enables th e computer to access the Internet.
DSL-G624T Wireless A DSL Router User’s Guide Note The Setup Wizard can be used to configure the In ternet conn ection for most users. If you are using a PPPoE or PPPoA type connection use the Setup Wizard to es tablish the Internet connectio n.
DSL-G624T Wireless A DSL Router User’s Guide Introduction This section pr ovides a bri ef description of the Router , its associated technologi es and a list of Router fe atures. Router Description and Operation The DSL-G624T R outer is desig ned to provi de a simple and cost-effe ctive ADSL Intern et connection for a private Ethernet or 802.
DSL-G624T Wireless A DSL Router User’s Guide • RIP-1/RIP-2 – The DSL-G624T supports both RIP-1 and R IP-2 exchan ges with other route rs. Using both versi ons lets the Router to communicate with all RIP enabled devices.
DSL-G624T Wireless A DSL Router User’s Guide Standards Compatibility and Compliance The DSL-G624T complies with or is compatible with th e following standards as rec ognized by their respective agencies. • ITU G.992.2 (G.lite) complian t • ITU-T Rec.
DSL-G624T Wireless A DSL Router User’s Guide Front Panel Display Place the Router in a location that perm its an easy view of the LED indicato rs on the front panel. The LED indi cators on the fro nt panel include the Po wer , Status , ADSL and WLAN and Ethernet (1-4) Link/A ct indicators.
DSL-G624T Wireless A DSL Router User’s Guide Rear Panel Connections All cable connections to th e Router are made at the rear pa nel. Connect the power adapter here to power on the Router. Use the Reset button to restore the settings to the factory defa ult values in th e next chapter for instruction s on using the reset button).
DSL-G624T Wireless A DSL Router User’s Guide Wireless LAN Basics Some basic understanding of 80 2.11b/g wireless technology and terminology is useful wh en you are setting up the Router or any wireless access point. If y ou are not familiar with wireless networks please take a few mi nutes to learn the basics.
DSL-G624T Wireless A DSL Router User’s Guide About 802.11g Wireless Today's 11-megabits-per-second 802.11b wireless networks are fine for broadband Internet access (which typically tops out at about 1 mbps) but rather sl ow for lar g e inte rnal file transfers or streaming vide o.
DSL-G624T Wireless A DSL Router User’s Guide Hardware Installation The DSL-G624T maintains three separate interfaces, an Ethe rnet LA N, a wireless LAN and an ADSL (WAN) in terface. Place the Router in a location where it can be connected to the vari ous devices as well as to a power source.
DSL-G624T Wireless A DSL Router User’s Guide Power on Router CAUTION: The Router m ust be used w i th the power adapter included with the device. To power on the Rout er: 1. Insert the AC Power Adapter cord in to the power receptacle locat ed on the rear panel of the Router and plug the adapter into a suitable near by power source.
DSL-G624T Wireless A DSL Router User’s Guide Hub or Switch to Router Connection Connect the Router to an up link port (MDI-II) on an Ethernet hub or switch with a straight-through cable as shown in .
DSL-G624T Wireless A DSL Router User’s Guide The illustration below shows the DSL-G624T co nnected to Ethernet LAN devices, Wireless LAN devices and the Internet.
DSL-G624T Wireless A DSL Router User’s Guide Basic Router Configuration The first time you setup the Router it is recommend ed that you configure the WAN connection using a sing le computer making sure that both the com puter and the Router a re not co nnected to t he LAN.
DSL-G624T Wireless A DSL Router User’s Guide Configuring IP Settings on Your Computer In order to configure your syste m to recei ve IP settings from the Router it m ust fi rst have the TCP/IP protocol installed. If you have an Ethern et port on your computer, it prob ably already has TCP/IP protocol installed .
DSL-G624T Wireless A DSL Router User’s Guide 2. In the Network Connecti ons windo w, right-click on LAN (Local Area Connection), then click Properties . 3. In t he General tab of the Local A rea Connection Properties m enu, highlight Internet Protocol (TC P/IP) under “This c o nnecti on uses the following items:” by clicking on it once.
DSL-G624T Wireless A DSL Router User’s Guide Windows 2000 First, check for the IP protocol and, if necessary, install it: 1. In the Windows task bar, click the Sta rt button, point to Settings , and then click Control Pa nel . 2. Double-click the Network and Dial-up Connections icon.
DSL-G624T Wireless A DSL Router User’s Guide 6. Double-click OK to confirm and save your change s. You will be prompted to restart Windows. 7. Clic k Yes . When it has restarted, y our computer is ready to use the R outer’s DHCP server. Windows ME First, check for the IP protocol and, if necessary, install it: 1.
DSL-G624T Wireless A DSL Router User’s Guide 5. Clic k OK twice to confirm and save your changes, a nd then close the Control Panel. Your computer is now ready t o use the Router’s DHCP server.
DSL-G624T Wireless A DSL Router User’s Guide Configure the Router When you successfully connect to t he web manager , the Home directory tab will display the Setup Wizard m enu. You can launch the Setup Wizard fro m this page or use the menu buttons located in the left p anel of the web page to view other menus us ed for basic configuration.
DSL-G624T Wireless A DSL Router User’s Guide Using the Setup Wizard To use the Setup Wizard, click t h e Run W izard button in the first browser window and follow the instructions in the pop-up dialog box t hat appears. The initial dialog box su mmarizes the setup process.
DSL-G624T Wireless A DSL Router User’s Guide Using the Setup Wizard - Choose Time Zone Choose the time zone you are in fr om the pull-down menu and click Next . This sets the system tim e used for the Router. If y ou wish to return to the previous menu duri ng the setup process, cl ick the Back button.
DSL-G624T Wireless A DSL Router User’s Guide Using the Setup Wizard - Choose Connection Type Now select the Connection Type used for the Internet conn ection. Your ISP has given this information to you . The connection types available in the Setup Wizard menu are PPPoE/PPPoA , Dynamic IP Address , Static IP Address and Bridge Mode .
DSL-G624T Wireless A DSL Router User’s Guide Using the Setup Wizard - For PPPoE/PPPoA connections: 1. Type in the Username and Password used to identify and verify your account to the ISP. 2. Select the specific Connection Type from t he drop-dow n menu.
DSL-G624T Wireless A DSL Router User’s Guide Using the Setup Wizard - For Dynamic IP Address connections: 1. Select the specific Connection Type from the drop-down menu. The avail able Dynam ic IP Address connection and encapsulation types are 1483 Bridged IP LLC and 14 83 Bri dged IP VC-MUX .
DSL-G624T Wireless A DSL Router User’s Guide Using the Setup Wizard - For Static IP Address connections: 1. Select the specific Connection Type from the dro p-down m enu. The available Stat ic IP Addres s connection and encapsulation types are 1483 Bridged IP LLC , 1483 Bridged IP VC-MUX , 148 3 Routed IP LLC , 1483 Routed IP VC-MUX and IPoA .
DSL-G624T Wireless A DSL Router User’s Guide Using the Setup Wizard - For Bridge Mode connections: 1. Select the specific Connection Type from the drop-down menu. The available Bridge Mode con n ecti on and encapsulation types are 1483 Bridged IP LLC and 1483 Bridge d IP VC-MUX .
DSL-G624T Wireless A DSL Router User’s Guide Using the Setup Wizard - Finish and Restart Finally you can confirm that the setup pr ocess is com pleted. If you are satisfied that you have entere d all the necessary information correctly, click the Restart button to save the new configuration settings and restart the Rou ter.
DSL-G624T Wireless A DSL Router User’s Guide Home This tab in the Web Manager will allow the user to set up vari ous configur ations in order to connect your Router to the Internet. Much of the information nece ssary in these screens must be supplied to you by your ISP.
DSL-G624T Wireless A DSL Router User’s Guide Configure Basic Wireless Settings Follow the instructions below to ch ange basic wireless settings. 1. To disable the wireless interface : click in the Enable AP check box to remove the check m ark and click the Apply button.
DSL-G624T Wireless A DSL Router User’s Guide Security Options for Wireless In the Wireless Settings menu, select the type of security you want to configure.
DSL-G624T Wireless A DSL Router User’s Guide WEP Encryption WEP (Wireless E ncryption Protocol o r Wired Eq uivalent Privacy) encry p tion can be enabled for sec urity and privacy. WEP encrypts the data portion of each frame transmitted fr om the wireless ada pter using one of the predefined key s.
DSL-G624T Wireless A DSL Router User’s Guide Configure WPA Settings WPA security for wi reless com munication has been developed to overcom e som e of the shortcom ings of WEP. WPA uses an impro ved encrypti o n method com bined with an authentication p rocedure.
DSL-G624T Wireless A DSL Router User’s Guide WPA-PSK re quires a shared key but does not use a se parate server for a uthentication. PSK keys can be ASCII or Hex type. Configure WPA-PSK Security for WLAN To use WPA with a PSK key: 1. Select the PSK Hex (Hexidecimal key) or PSK String (AS CII key of between 8 to 63 characters) option.
DSL-G624T Wireless A DSL Router User’s Guide Configure WAN Connection To configure the Router’s basic configuratio n settings wi t hout running the Setup Wizard, you can access the menus used to conf igure WAN, LAN, DHCP and DNS settings directly from the Home directory.
DSL-G624T Wireless A DSL Router User’s Guide PPPoE and PPPoA Connection for WAN Follow the instructions below to conf igure t h e Router to us e a PPP oE or PPPoA for the Inte rnet connect ion. Make sure you have all the necessary i nformati on before you configur e the WAN co nnection.
DSL-G624T Wireless A DSL Router User’s Guide Additional settings for PPPoE/ PPPoA connections: PPPoE/PPPoA Parameters Description User Name For PPP connections, a User Name an d Password are used to identify and verify your account to the ISP. Enter the User Name for your ADSL service account.
DSL-G624T Wireless A DSL Router User’s Guide Dynamic IP Address Connection for WAN A Dynamic IP Add ress connection configur es the Router to automatically obt ain its global IP address from a DHCP server on the ISP’s network. The service provide r assig ns a global IP addre ss fro m a pool of addresses avail a b le to the service provi der.
DSL-G624T Wireless A DSL Router User’s Guide 7. The Firewall should remain enabled for most users. If you choose to disable this you will no t be able to use the features configured in the Firewall and Filters menus locat ed in the Advanced directory.
DSL-G624T Wireless A DSL Router User’s Guide Bridged Connection for WAN For Bridged connections it will be necessary for most users to install additional software on any co m p uter that will the Router for Internet access.
DSL-G624T Wireless A DSL Router User’s Guide Static IP Address for Connection WAN When the Router is configured to use St atic IP Address assignment for th e WAN connection, you must m anually assign a global IP Address, Subnet Mask and Gatew ay IP Address used fo r the WAN connection.
DSL-G624T Wireless A DSL Router User’s Guide 7. The Firewall should remain enabled for most users. If you choose to disable this you will no t be able to use the features configured in the Firewall and Filters m enus located in the A dvanced di rectory.
DSL-G624T Wireless A DSL Router User’s Guide ATM Traffic Shaping The ATM settings i n the WAN configurati on menus for the different connection typ es can be used to adjust QoS parameters for ADSL clients. This may not be av ailable to all ADSL accounts.
DSL-G624T Wireless A DSL Router User’s Guide ATM VC Settings ATM VC settings can be configured for all connection type s in the WAN configuration menu of the Home directory. ATM VC Settings in WAN connection menu The table belo w describes the ATM VC set tings used to configure a PPPoE or PPPoA connectio n for an ADSL account.
DSL-G624T Wireless A DSL Router User’s Guide LAN IP Settings You can configure the LAN IP address to suit yo ur preference. Many users will find it convenient to use the default settings together with DHCP service to manage the IP settings for their private network.
DSL-G624T Wireless A DSL Router User’s Guide DHCP Server Settings for the LAN The DHCP se rver is enabled by defaul t for the Router’s Ethernet LAN interface. DHCP service will supply IP settings to workstation s configured to automatically obtain IP settings th at are connected to the R outer though the Ethernet port.
DSL-G624T Wireless A DSL Router User’s Guide Static IP Settings for the LAN If you want to fix an IP a d dress to a s pecific MAC address on your LAN, use the Static IP Assignment feature located on the DHCP settings me nu. Up to 5 stati c IP addresses may be configure d.
DSL-G624T Wireless A DSL Router User’s Guide DNS Server Settings The Router ca n be configure d to relay DNS settings from your I SP or another available service to workst ations on y our LAN. When using DNS relay, the Rout er will accept DNS requests from hosts on the LAN and forw ard them to the ISP’s, or alternative DNS servers.
DSL-G624T Wireless A DSL Router User’s Guide Dynamic DNS The DI-624S supports DDNS or Dy namic Domain Nam e Servi ce. Dynamic DNS allows a dy namic public IP address to be associated with a static host na me in any of the many domains, allowi ng access to a specific host from various locations on the Internet.
DSL-G624T Wireless A DSL Router User’s Guide Save Settings and Reboot When you have configured the DSL-G624T with the settings you desire, make sure you save those settings. To save the system configuration settings, click the Too ls tab. You will be presented first w ith the Administrator Settings menu.
DSL-G624T Wireless A DSL Router User’s Guide Advanced Router Management This chapter introduces and describes the management feat ures that have not bee n p resented in the previous chapter.
DSL-G624T Wireless A DSL Router User’s Guide UPnP UPnP sup ports zero-c onfiguration netw orking a nd automat ic discovery for m any types o f networked de vices.
DSL-G624T Wireless A DSL Router User’s Guide Virtual Server Use the Virtual Server menu to set up port forwarding rules in the Router. The Virtual Server func tion allows rem o te users to access services on your LAN such as FTP for file transfers or SMTP and POP3 for e-m ail.
DSL-G624T Wireless A DSL Router User’s Guide Rule Management w indow To configure this window , enter a Rule Name , the Protoc ol (TCP, UDP or both ), a range of virtual ports to be used in the Port Start and Po rt End fields and th e Port for which this rule is to be applied.
DSL-G624T Wireless A DSL Router User’s Guide LAN Clients The LAN Clie nts menu is used when esta blishing Port Forwardi ng, Access Control and Advanced Sec urity rules for IP addresses on t he LAN. This menu ca n be accessed directly by clicking on the LAN Clients button or hyperlink in the Advanced setup menu.
DSL-G624T Wireless A DSL Router User’s Guide SNMP SNMP (Sim ple Networ k Managem ent Protocol ) is a widely use d network monito ring and cont rol prot ocol tha t re por ts activity on each network device to the admi n istrat or of the netw ork. SNMP can be used to monitor traffic and statistics of the router.
DSL-G624T Wireless A DSL Router User’s Guide Filters Filter rules in the Router are put in place to allow or block specified traffic. The Filter Rules however can be use d in a single direction to examine and then Allow or Den y traffi c for Inbound (WAN to LAN) or Outbo und (LAN to WAN) routed data.
DSL-G624T Wireless A DSL Router User’s Guide Destination IP Where the Destination IP addre ss resides al so depends on if you are config uring an Inbound or Outbound filter rule. You can opt to indicat e a Mask Range , a Single IP , an IP Range or Any IP from the pull-down menu.
DSL-G624T Wireless A DSL Router User’s Guide Bridge Filters Bridge filters are used to block or allow various typ es of packets through the WAN interface. This may be done for security or to improve network efficiency. Th e rules are conf igured for individual devices based on MAC address.
DSL-G624T Wireless A DSL Router User’s Guide Routing Use the Routing Table to specify a route used for da ta traffic within your Ethernet LAN or to route data on the WAN. This is used t o specify that al l packets desti n ed for a particular networ k or subnet use a predetermined gate way.
DSL-G624T Wireless A DSL Router User’s Guide DMZ Since some applications are not compatible with NAT, th e Rout er supports use of a DMZ IP address for a sing le host on the LAN. This IP address is not protected by NAT and will therefore be visi ble to a gents on the Internet with the right type of software.
DSL-G624T Wireless A DSL Router User’s Guide Firewall The Firewall Configuration menu allows the Router to enforce specific predefined p olicies intended to protect against certain common types of attacks.
DSL-G624T Wireless A DSL Router User’s Guide RIP The Router supports RIP v1 and RIP v2 u sed to share routing tables with oth er Layer 3 routing devices on your local network or remote LAN.
DSL-G624T Wireless A DSL Router User’s Guide PPP When the WAN connection i s configured for either PPPoA or PPPoE, y ou can c onfigure the Rou ter’s PPP session to remain on all the time, or to disconnect after some period of no activity. You may also choose to instruct the Router to connect each time you want to access the WAN or the Internet.
DSL-G624T Wireless A DSL Router User’s Guide ADSL The ADSL Confi guration page allows t h e user to set the configurati on for ADS L protocols . For most ADSL accounts the default settings Multi-mode will work. This configuration work s with a ll ADSL implementations.
DSL-G624T Wireless A DSL Router User’s Guide ATM VCC The ATM Virtual Circuit connection menu is used to config ure the WAN connection. If y ou are using mult iple PVCs, you can change the configu ration of any PVC in this menu . To create new or additiona l PVCs, read the section below on Multiple PVCs.
DSL-G624T Wireless A DSL Router User’s Guide QoS QoS or Quality of Service is used to allot priority from the r outer. This is done by allotting a priority from a port to a PVC as shown in the screen below. Ther e are four priorities for each QoS configur ation.
DSL-G624T Wireless A DSL Router User’s Guide Wireless Management The Wireless Management men u located in the Advanced directory is used to control MAC address access to the wireless access point and to view a list of MAC addresse s that are cu rrently associated with the access poi nt.
DSL-G624T Wireless A DSL Router User’s Guide Wireless Performance If you want to tweek wireless settings, click the Wireless Performance menu button in the Advanced directory Note It is recommended for most users to use the default Wireless LAN Performance settings.
DSL-G624T Wireless A DSL Router User’s Guide Tools Click the Tools tab to reveal the m enu buttons for various f unctions located i n this direct ory.
DSL-G624T Wireless A DSL Router User’s Guide Change System Password To change the password used to access t he Router web manager, click the Admin button in the Tools directory to display the A dministrator Settings m enu. Under the Adm inistrator headi ng, type the New Password and Confirm Password to be certain you have typed it correctly.
DSL-G624T Wireless A DSL Router User’s Guide Time The Router provides a number of option s to maintain current date and time including SNTP. Time & Date Configuration To configure system time on the Router, select the method us ed to maintain time.
DSL-G624T Wireless A DSL Router User’s Guide Remote Log The Remote Log settings screen allows the user to set up a rou ter log recipient for events occurring on the router. The user may select the severity level of router ev ents to be logged by a re mote log recipient.
DSL-G624T Wireless A DSL Router User’s Guide System Once you have configur ed the Router to your satisfaction, it is a good idea to back up the conf iguration file to your computer. To save the cur rent configuration settings to your computer, click the Admin button in the Tools directory to display the Administrator Settings menu.
DSL-G624T Wireless A DSL Router User’s Guide Firmware Note Performing a Firmware Up grade can sometimes change the configuratio n settings. Be sure to back-up the Router’s configuration settings before upgradi ng the firmware. Use the Firmware Upgrade menu to load the latest fir m ware for the device.
DSL-G624T Wireless A DSL Router User’s Guide Ping Test (Miscellaneous) To perform a statndard Ping test for net work connectivity, click t he Misc. me nu button in the To ols directory to view the Miscellaneo us Configuration menu. The Ping test functions on the WAN and LAN interfaces.
DSL-G624T Wireless A DSL Router User’s Guide Test The Test menus are used to test connectivity of the R outer . A Ping test may be done through the local or external interface to test connectivity to known IP addresses. The diagnostics fea ture executes a series of test of your system software and hardware connection s.
DSL-G624T Wireless A DSL Router User’s Guide Status Information Use the variou s read-only menus to view system inform ation and monitor performa nce.
DSL-G624T Wireless A DSL Router User’s Guide Device Information Display Use the Device In formation window to qui ckly view basic current information about the LAN and WAN interfaces and device inform ation including Firm ware Version and M AC address.
DSL-G624T Wireless A DSL Router User’s Guide DHCP Clients This screen will allow the user to view DHCP clients curren tly at tached to the rout er, defined by MAC Ad dress, IP Address and Host Name.
DSL-G624T Wireless A DSL Router User’s Guide Log The system log dis plays chronological even t log data. Use the navigati on buttons to vi ew or scroll log pages. You may also save a sim p le text file containing the log to y our computer. Click the Save L og button a nd follow the prom pts to save the file.
DSL-G624T Wireless A DSL Router User’s Guide Traffic Use the Traffic Statistics window to monitor traffic on the Ethernet, ADSL or Wireless Internet connection. Select the interface for which you want to view packet statistics and the information will appear below.
DSL-G624T Wireless A DSL Router User’s Guide ADSL Use the ADSL St atus information and t he Test page f or troubleshooting the A DSL connection. ADSL Status information 81.
DSL-G624T Wireless A DSL Router User’s Guide A Technical Specifications General Standards IEEE 802.11b/ 802.11g IEEE 802.3/ 802.3u IEEE 802.1d RFC 791 (IP Routing) RFC 792 (UDP) RFC 826 (ARP) RFC 10.
DSL-G624T Wireless A DSL Router User’s Guide Wireless Modulation IEEE 802.11b: DQPSK, DBPSK, DSSS, and CCK IEEE 802.11g: BPSK, QPSK, 16QAM, 64QAM, OFDM Frequency 2400 ~ 2484.5MHz ISM band Channels 11 channels for United States 13 channels for Europe an Countries 13 channels for Japa n Wireless Data Rates IEEE 802.
DSL-G624T Wireless A DSL Router User’s Guide B IP Address Setup The DSL-G624T is designed to prov ide network administrators maximum flexibility for IP addressing on the Ethern et LAN. The easiest IP setup choice in most cases is to let the Rout er do it usi ng DHCP, whi ch is enabled by d efault.
DSL-G624T Wireless A DSL Router User’s Guide (each computer m ust have a uni que address to distinguish it on the network). The IP addr ess schem e used in Example #1 can be used for any LAN th at requires up to 253 separate IP addresses (exclud ing the Router).
DSL-G624T Wireless A DSL Router User’s Guide C IP Concept s This appendix describes some basic IP concepts, the TCP/IP addressing scheme and shows ho w to assign IP Addresses. When setting up the Router, you must make sure it has a va lid IP address.
DSL-G624T Wireless A DSL Router User’s Guide Note All network addresses out side of these ranges (Class D and E) are either reserved or set aside for experiment al networks or multicasting. When an IP address's host portion contains only zero (s), the address identifies a networ k and not a host.
DSL-G624T Wireless A DSL Router User’s Guide D Micro Filters and Splitters Most ADSL clients will be required to install a simple device that prevents the ADSL line fr om interfering with regular telephone services. These devices are c o mm only referred to as micro filters or som et im es called (inaccurately) line splitters.
DSL-G624T Wireless A DSL Router User’s Guide Split Line Filter If you are instructed to use a split line filter you must in stall the device between the Router and the pho ne jack.
An important point after buying a device D-Link DSL-G624T (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought D-Link DSL-G624T yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data D-Link DSL-G624T - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, D-Link DSL-G624T you will learn all the available features of the product, as well as information on its operation. The information that you get D-Link DSL-G624T will certainly help you make a decision on the purchase.
If you already are a holder of D-Link DSL-G624T, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime D-Link DSL-G624T.
However, one of the most important roles played by the user manual is to help in solving problems with D-Link DSL-G624T. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device D-Link DSL-G624T along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center