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Product Overview   

D-Link DSL-2640BT User Manual

 

4

LED Indicators 

Front Panel 

 

Side Panel 

 

 

LED 

Color 

Status 

Description 

Off 

Power not supplied. 

Green 

On Power 

supplied. 

Power 

Red 

On 

Not bootable or device is malfunction. 

Off 

No LAN link. 

Blink 

Data is being transmitted through the LAN interface. 

LAN 1/2/3/4 

Green 

On 

LAN link is established and active. 

Off 

WLAN is disabled. 

Blink 

WLAN traffic is flowing. 

WLAN Green 

On 

WLAN link is established. 

Off 

DSL line is disconnected. 

Blink 

DSL line is training. 

DSL Green 

On 

DSL line is connected. 

Off 

The device is under the Bridge mode, DSL connection is not present, or the power is off. 

Blink 

DSL traffic is flowing. 

Green 

On 

IP is connected. 

Internet 

Red 

On 

The device is attempted to become IP connected, but failed. 

Off 

Device is ready for new WPS to setup. 

Blink 

WPS is successfully triggered. 

WPS button (on the 
side panel) 

Blue 

On 

Press the button to enable WPS service. When connection is successfully established between the router 
and the client, the LED remains in solid light for 5s.   

 

Summary of Contents for DSL-2640BT

Page 1: ... ...

Page 2: ...e the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interf...

Page 3: ...s Security 26 Local Network 29 Time and Date 31 Logout 31 Advanced Configuration 32 Advanced Wireless 32 Advanced Settings 33 MAC Filtering 34 Security Settings 35 Port Forwarding 38 Port Triggering 40 DMZ 42 Parental Control 42 Block Website 43 Block MAC Address 44 Filtering Options 46 Inbound IP Filtering 46 Outbound IP Filtering 48 Bridge Filtering 50 Firewall Settings 52 DNS 53 Dynamic DNS 54 ...

Page 4: ...ation 76 Wireless Clients 77 DHCP Clients 78 Logs 78 Statistics 79 Route information 80 TROUBLESHOOTING 81 NETWORKING BASICS 82 Check Your IP Address 82 Statically Assign An IP Address 83 TECHNICAL SPECIFICATIONS 84 ...

Page 5: ...SL Router Power Adapter CD ROM with User Manual One twisted pair telephone cable used for ADSL connection One straight through Ethernet cable One Quick Installation Guide Warning The Router must be used with the power adapter included with the device System Requirements ADSL Internet service Computer with 200 MHz Processor 64MB Memory CD ROM Drive Ethernet Adapter with TCP IP Protocol Installed In...

Page 6: ...ed by major vendors RIP 1 RIP 2 The DSL 2640BT supports both RIP 1 and RIP 2 exchanges with other routers Using both versions lets the Router to communicate with all RIP enabled devices Static Routing This allows you to select a data path to a particular network destination that will remain in the routing table and never age out If you wish to define a specific route that will always be used for d...

Page 7: ...Product Overview D Link DSL 2640BT User Manual 3 Hardware Overview Connections ...

Page 8: ... On WLAN link is established Off DSL line is disconnected Blink DSL line is training DSL Green On DSL line is connected Off The device is under the Bridge mode DSL connection is not present or the power is off Blink DSL traffic is flowing Green On IP is connected Internet Red On The device is attempted to become IP connected but failed Off Device is ready for new WPS to setup Blink WPS is successf...

Page 9: ...40BT uses an HTML based web interface for setup and MAINTENANCE The web configuration manager may be accessed using any operating system capable of running web browser software including Windows 98 SE Windows ME Windows 2000 Windows XP and Windows Vista Web Browser Any common web browser can be used to configure the Router using the web configuration MAINTENANCE software The program is designed to...

Page 10: ... IP enabled device on the LAN side of the bridge such as a PC a server a gateway device such as a router or similar firewall hardware The IP address can be assigned in a number of ways Your network service provider will give you instructions about any additional connection software or NIC configuration that may be required Wireless LAN Computers using the Wireless network can access the Internet o...

Page 11: ...ay need to change the type of modulation used for their service The default DSL modulation Auto Synch Up used for the Router automatically detects all types of ADSL ADSL2 and ADSL2 modulation Security Protocol This is the method your ADSL service provider will use to verify your Username and Password when you log on to their network Your Router supports the PAP and CHAP protocols VPI Most users wi...

Page 12: ... 2640BT This is the subnet mask used by the DSL 2640BT and will be used throughout your LAN The default subnet mask is 255 255 255 0 This can be changed later Information you will need about your LAN or computer Ethernet NIC If your computer has an Ethernet NIC you can connect the DSL 2640BT to this Ethernet port using an Ethernet cable You can also use the Ethernet ports on the DSL 2640BT to conn...

Page 13: ...ADSL connection if the ADSL line is connected and the Wireless ADSL Router is properly configured the DSL LED will light up after several seconds If this is the first time installing the device some settings may need to be changed before the Wireless ADSL Router can establish a connection Factory Reset Button The Router may be reset to the original factory default settings by using a ballpoint or ...

Page 14: ...ines when deciding what type of cable to use to make this connection When connecting the Router directly to a PC or server use a normal straight through cable You should use a crossed cable when connecting the Router to a normal MDI X port on a switch or hub Use a normal straight through cable when connecting it to an uplink MDI II port on a hub or switch The rules governing Ethernet cable lengths...

Page 15: ...hange IP settings and DHCP server setup Preparation Before Login Before accessing the Modem ensure the communication between PC and Modem is normal Check the communication as follows Configure the IP address of the PC as 192 168 1 X 2 254 net mask as 255 255 255 0 gateway address as 192 168 1 1 for customized version configure them according to the actual version Enter arp a in the DOS window to c...

Page 16: ...er are admin and admin The username and password of the common user are user and user You need not enter the username and password again if you select the option Remember my password It is recommended to change these default values after logging in to the DSL router for the first time Step 4 Click Login to log in After logging in to the DSL router as a super user you can query configure and modify...

Page 17: ... Link DSL 2640BT User Manual 13 If you log in as the super user successfully the page shown in the figure appears If the login information is incorrect the page shown in the figure appears Click Try Again to log in again ...

Page 18: ...ou are connected to the Internet Your physical WAN device can be Ethernet DSL or both Technical information about the properties of your Internet connection is provided by your Internet service provider ISP For example your ISP should inform you whether you are connected to the Internet using a static or dynamic IP address or the protocol such as PPPoA or PPPoE that you use to communicate over the...

Page 19: ...teps to configure the device Click Next to continue Change the password for logging in to the device The default password is admin To secure your network modify the password timely Note Confirm password must be the same as the new password To ignore the step click Skip ...

Page 20: ...on D Link DSL 2640BT User Manual 16 Set the time and date Configure the Internet connection Select the country and ISP Set the VPI and VCI If you fail to find the country and ISP from the drop down lists select Others ...

Page 21: ...Web Configuration D Link DSL 2640BT User Manual 17 If the Protocol is PPPoE or PPPoA the page shown in either of the two figures appears ...

Page 22: ...Web Configuration D Link DSL 2640BT User Manual 18 Set the user name and password as provided by your ISP ...

Page 23: ...0BT User Manual 19 If the Protocol is Static IP the page shown in the figure appears Enter the IP Address Subnet Mask Default Gateway and Primary DNS Server If the Protocol is Dynamic IP or Bridge the page shown in the figure appears ...

Page 24: ...Web Configuration D Link DSL 2640BT User Manual 20 After proper configuration click Next ...

Page 25: ...Web Configuration D Link DSL 2640BT User Manual 21 Configure the wireless network Enter the information and click Next ...

Page 26: ...appears In this page you can view the configuration information When the settings are complete click Restart to apply the settings and reboot the device Note In each step of the Wizard page you can click Back to review or modify the previous settings Click Cancel to exit the wizard page ...

Page 27: ...Web Configuration D Link DSL 2640BT User Manual 23 Internet Setup Choose SETUP Internet Setup The page as shown in the figure appears ...

Page 28: ...tegory Select UBR with PCR UBR without PCR CBR Non Realtime VBR or Realtime VBR from the drop down list Peak Cell Rate Set the maximum transmission rate of the cell in ATM transmission Sustainable Cell Rate Set the minimum transmission rate of the cell in ATM transmission Maximum Burst Size Set the maximum burst size of the cell in ATM transmission CONNECTION TYPE Protocol Select PPP over ATM PPPo...

Page 29: ...h wireless LAN cards communicating through access points which bridge network traffic to wired LAN Choose Setup Wireless Settings The Wireless Settings page shown in the right figure appears Wireless Basics In the Wireless Settings page click Wireless Basics The page shown in the right figure appears In this page you can configure the parameters of wireless LAN clients that may connect to the devi...

Page 30: ...eless Settings page click Wireless Security The page shown in the right figure appears Wireless security is vital to your network to protect the wireless communication among wireless stations access points and wired network You can select the security mode from the drop down list ...

Page 31: ...th Select 64 bit or 128 bit data encryption WEP Key 1 4 You can manually input key value from Key1 to Key4 Type a character sting and apply changes For a 64 bit WEP key Enter 5 characters ASCII sting or 10 hexadecimal characters 0 9 A F For a 128 bit WEP key Enter 13 characters ASCII sting or 26 hexadecimal characters 0 9 A F ...

Page 32: ...Web Configuration D Link DSL 2640BT User Manual 28 If you select the Auto WPA or WPA2 WPA or WPA2 as the security mode the right page appears ...

Page 33: ... address of the device is the base address used for DHCP To use the device for DHCP on your LAN the IP address pool used for DHCP must be compatible with the IP address of the device The IP address available in the DHCP IP address pool changes automatically if you change the IP address of the device You can also enable the secondary LAN IP address The two LAN IP addresses must be in different netw...

Page 34: ... assign IP addresses on the LAN to specific individual computers based on their MAC addresses Click Add to add static DHCP optional The page shown in the figure appears Select Enable to reserve the IP address for the designated PC with the configured MAC address The Computer Name helps you to recognize the PC with the MAC address For example Father s Laptop Click Copy Your PC s MAC Address to obta...

Page 35: ...ou can also configure daylight saving to automatically adjust the time when needed Select Automatically synchronize with Internet time servers Select the specific time server and the time zone from the corresponding drop down lists Select Enable Daylight Saving if necessary Select the proper Daylight Saving Offset from the drop down list and set the daylight saving dates Click Apply to save the se...

Page 36: ...dvanced features used for network MAINTENANCE security and administrative tools to manage the device You can view the status and other information of the device to examine the performance and troubleshoot Advanced Wireless Choose ADVANCED Advanced Wireless The page shown in the right figure appears ...

Page 37: ...Web Configuration D Link DSL 2640BT User Manual 33 Advanced Settings Select Advance Settings The page shown in the following figure appears Click Apply to save the settings ...

Page 38: ...nfiguration D Link DSL 2640BT User Manual 34 MAC Filtering Select MAC Filtering The page shown in the right figure appears Click Add The page shown in the right figure appears Click Apply to save the settings ...

Page 39: ...ngs Select Security Settings The page shown in the right figure appears Select the SSID that you want to configure from the drop down list Select the encryption type from the Security Mode drop down list You can select None WEP AUTO WPA or WPA2 WPA Only or WPA2 Only ...

Page 40: ...h Select 64 bit or 128 bit data encryption WEP Key 1 4 You can manually input key value from Key1 to Key4 Type a character sting and apply changes For a 64 bit WEP key Enter 5 characters ASCII sting or 10 hexadecimal characters 0 9 A F For a 128 bit WEP key Enter 13 characters ASCII sting or 26 hexadecimal characters 0 9 A F ...

Page 41: ...tion D Link DSL 2640BT User Manual 37 If you select AUTO WPA or WPA2 WPA Only or WPA2 Only the page shown in the right figure appears Only the WPS button is effective in WPA PSK mode Click Apply to save the settings ...

Page 42: ... FTP for file transfers or SMTP and POP3 for e mail The device receives remote requests for these services at your public IP address It uses the specified TCP or UDP protocol and port and redirects these requests to the server on your LAN with the specified LAN IP address Note that the specified private IP address must be within the available IP address range of the subnet where the device is in C...

Page 43: ...ce for a preset application or enter the name in the Custom Server field Enter an IP address in the Server IP Address field to appoint the corresponding PC to receive forwarded packets The port table displays the ports that you want to open on the device The Protocol indicates the type of protocol used by each port ...

Page 44: ... dynamically open the firewall ports when an application on the LAN initiates a TCP UDP connection to a remote party using the trigger ports The device allows the remote party from the WAN side to establish new connections back to the application on the LAN side using the firewall ports A maximum of 32 entries can be configured Choose ADVANCED Port Triggering The page shown in the right figure app...

Page 45: ...Manual 41 Click Add The page shown in the following figure appears Select a name for the preset application or enter a name in the Custom application field Enter the trigger port and select the Trigger Protocol Click Apply to save the settings ...

Page 46: ... the correct type of software Note that any client PC in the DMZ is exposed to various types of security risks If you use the DMZ take measures such as client based virus protection to protect the remaining client PCs on your LAN from possible contamination through DMZ Choose ADVANCED DMZ The page shown in the right figure appears Click Apply to save the settings Parental Control Choose ADVANCED P...

Page 47: ... Website The page shown in the right figure appears Click Add The page shown in the right page appears Enter the website in the URL field Select the Schedule from drop down list or select Manual Schedule and select the corresponding time and days Click Apply to add the website to the BLOCK WEBSITE Table ...

Page 48: ...Web Configuration D Link DSL 2640BT User Manual 44 Block MAC Address In the PARENT CONTROL page click Block MAC Address The page as shown in the figure appears ...

Page 49: ...he computer that connects to the device Other MAC Address Enter the MAC address of another device that is included in MAC filtering Schedule Select the time of MAC filter from the drop down list You can select always or never Manual Schedule If you select this check box you need to manually set the time of MAC filtering Enter the use name and MAC address Select the corresponding time and days Then...

Page 50: ...6 Filtering Options Choose ADVANCED Filtering Options The FILTERING OPTIONS page as shown in the figure appears Inbound IP Filtering In the FILTERING OPTIONS page click Inbound IP Filtering The INCOMING IP FILTERING page as shown in the figure appears ...

Page 51: ...tocol source destination IP address subnet mask and source destination port Then click Apply to save the settings Note The settings apply only when the firewall is enabled The ACTIVE INBOUND FILTER in the INCOMING IP FILTERING page displays detailed information of each created inbound IP filter Click Delete to delete an IP filter Note that the Delete button appears only when at least one IP filter...

Page 52: ...ng IP traffic from the LAN is allowed The outbound filter allows you to create a filter rule to block outgoing IP traffic by specifying a filter name and at least one criterion In the FILTERING OPTIONS page click Outbound IP Filtering The OUTGOING IP FILTERING page as shown in the figure appears ...

Page 53: ...e of the following criteria protocol source destination IP address subnet mask and source destination port Click Apply to save the settings The ACTIVE OUTBOUND FILTER in the OUTGOING IP FILTERING page displays detailed information OF each created outbound IP filter Click Delete to delete an IP filter Note that the Delete button appears only when at least one IP filter exists ...

Page 54: ...ge Filtering In the FILTERING OPTIONS page click Bridge Filtering The page as shown in the figure appears This page is used to configure bridge parameters In this page you can modify the settings or view the information of the bridge and its attached ports ...

Page 55: ...I or IGMP Destination MAC Address Enter the destination MAC address to be mapped Source MAC Address Enter the source MAC address to be mapped Frame Direction Select the frame direction to be mapped from the drop down list The device supports frame direction from LAN to WAN and that from WAN to LAN Schedule Select the time that you want to apply the rule from the drop down list You can select alway...

Page 56: ...twork traffic The attackers attempt to disrupt connections between two machines thereby preventing access to a service The attackers attempt to prevent a particular individual from accessing a service The attackers attempt to disrupt service to a specific system or person Port scan protection is designed to block attempts to discover vulnerable ports or services that might be exploited in an attac...

Page 57: ...nd so on until the correct IP address is returned Choose ADVANCED DNS The page as shown in the figure appears The table describes the parameters in this page Field Description Obtain DNS server address automatically If you select this radio button the device automatically obtains IP address of the DNS server from the ISP You need not manually enter the IP address of the server Use the following DN...

Page 58: ... For example if you are running a public web server or VPN server on your LAN DDNS ensures that the host can be located from the Internet even if the public IP address changes DDNS requires that an account be set up with one of the supported DDNS service providers DyndDNS org or dlinkddns com Choose ADVANCED Dynamic DNS The page shown in the right page appears Click Add to add dynamic DNS The page...

Page 59: ...Web Configuration D Link DSL 2640BT User Manual 55 Network Tools Choose ADVANCED Network Tools The NETWORK TOOLS page as shown in the figure appears ...

Page 60: ...Web Configuration D Link DSL 2640BT User Manual 56 Port Mapping In the NETWORK TOOLS page click Port Mapping The page as shown in the figure appears ...

Page 61: ...onfiguration D Link DSL 2640BT User Manual 57 In this page you can bind the WAN interface and the LAN interface to the same group When you setup the port mapping you need to enable the virtual ports at first ...

Page 62: ...s To create a mapping group do as follows Step 1 Enter the group name Step 2 Select interfaces from the Available Interfaces list and click the arrow button to add them to the grouped interface list in order to create the required mapping of the ports The group name must be unique Step 3 Click Apply to save the settings ...

Page 63: ...lticast packets If a host is deleted from the group the host cannot receive the multicast packets any more Click Apply to save the settings Queue Configuration In the NETWORK TOOLS page click Queue Config The page as shown in the figure appears Entries in this table are used to assign the precedence for each incoming packet based on physical LAN port TCP or UDP port number source or destination IP...

Page 64: ...ink DSL 2640BT User Manual 60 Click Add The page as shown in the figure appears Click Apply to save the settings Quality of Service In the NETWORK TOOLS page click Quality of Service The page as shown in the figure appears ...

Page 65: ...t the physical port of the packet from the drop down list Source MAC Address Enter the source MAC address of the packet Source MAC Mask Use mask 000000ffffff to mask the MAC address 00 indicates not mapped and ff indicates mapped Destination MAC Address Enter the destination MAC address of the packet Destination MAC Mask Use mask 000000ffffff to mask the MAC address 00 indicates not mapped and ff ...

Page 66: ...ic discovery of your device in the network If you are concerned about UPnP security you can disable it Block ICMP ping should be enabled so that the device does not respond to malicious Internet requests Click Apply to save the settings ADSL Settings In the NETWORK TOOLS page click ADSL The page as shown in the figure appears In this page you can select the ADSL modulation Normally you are recomme...

Page 67: ...s In this page you can set SNMP parameters Read Community The network administrator must use this password to read the information of this device Set Community The network administrator must use this password to configure the information of this device Trap Manager IP The trap information is sent to this host Click Apply to save the settings ...

Page 68: ...ificates Choose ADVANCED Network Tools and click Certificates The Certificates page shown in the right figure appears In this page you can set local certificate and trusted certificate Routing Choose ADVANCED Routing The page as shown in the figure appears ...

Page 69: ...page Field Description Destination Network Address The destination IP address of the device Subnet Mask The subnet mask of the destination IP address Use Gateway IP Address The gateway IP address of the device Use Interface Select the interface of the static routing used by the device from the drop down list Note You can enter the gateway IP address of the device in the Use Gateway IP Address fiel...

Page 70: ... in the Use Gateway IP Address and Use Interface fields Click Apply to save the settings RIP Choose ADVANCED Routing and click RIP The page shown in the following figure appears This page is used to select the interfaces on your device that use RIP and the version of the protocol used If you are using this device as a RIP enabled device to communicate with others using the routing information prot...

Page 71: ...re appears The table describes the parameters in this page Field Description Name Set the name of the schedule Day s You can select one more or all of the seven days in a week All Day 24 hrs If you select the check box the rule applies throughout the 24 hours of the day Start Time Set the start time of the firewall End Time Set the end time of the firewall Click Apply to save the settings ...

Page 72: ...s the buttons in this page Button Description Reboot Restart the device Backup Settings Specify the path to back up the current configuration in a configuration file on your computer You can rename the configuration file UPDATE SETTINGS Click Browse to select the configuration file of device and click Update Settings to update the configuration of the device Restore Default Settings Reset the devi...

Page 73: ... In this page you can upgrade the firmware of the device To update the firmware do as follows Step 1 Click Browse to select the file Step 2 Click Update Firmware to update the configuration file The device loads the file and reboots automatically Caution Do not turn off your device or press the Reset button when the procedure is in progress ...

Page 74: ...iguration D Link DSL 2640BT User Manual 70 Access Controls Choose MAINTENANCE Access Controls The ACCESS CONTROLS page as shown in the figure appears This page contains Account Password Services and IP Address ...

Page 75: ...ssword you need to reset the device to the factory default settings In that case all configuration settings of the device are lost The table describes the parameters in this page Field Description ACCOUNT PASSWORD Username Select a user name from the drop down list to access the device You can select admin support or user Current Password Enter the password of the user New Password Enter the new p...

Page 76: ...vices that are used by the remote host For example if telnet service is enabled at port 23 the remote host can access the device by telnet through port 23 Select the MAINTENANCE services that you want to enable or disable at the LAN or WAN interface and click Apply to apply the settings Caution If you disable the HTTP service you cannot access the configuration page of the device any more ...

Page 77: ...n the access control list ACL If ACL is enabled only devices of the specified IP addresses can access the device Select Enable Access Control Mode to enable ACL Note If you enable ACL ensure that the IP address of the host is in the ACL list Click Add The page as shown in the figure appears Enter the IP address of the desired device in the IP Address field and click Apply to apply the settings ...

Page 78: ...Link DSL 2640BT User Manual 74 Diagnostics Choose MAINTENANCE Diagnostic The page as shown in the figure appears In this page you can test the connection status of the device Click Rerun Diagnostic Test to run diagnostics ...

Page 79: ...g in the local computer Remote indicates to send the log to the remote log server Both indicates to save the log in the local computer and the remote log server To log the events do as follows Step 3 Select Enable Log Step 4 Select a mode from the drop down list If you select Remote or Both enter the IP address and port number of the server Step 5 Click Apply to apply the settings Step 6 Click Vie...

Page 80: ... the system information and monitor the performance of the device Device Information Choose STATUS Device Info The page as shown in the figure appears The page displays the summary of the device status including the system information WAN connection information and local network information ...

Page 81: ... Configuration D Link DSL 2640BT User Manual 77 Wireless Clients Choose STATUS Wireless Clients The page shown in the right page appears The page displays authenticated wireless stations and their statuses ...

Page 82: ...pears This page displays all client devices that obtain IP addresses from the device You can view the host name IP address MAC address and expiration time of the IP address Logs Choose STATUS Logs The page as shown in the figure appears This page displays the system log Click Refresh to refresh the system log shown in the box ...

Page 83: ...atistics The page as shown in the figure appears This page displays the statistics information of the network and data transmission The information helps technicians to identify whether the device is functioning properly The information does not affect the functions of the device ...

Page 84: ...eb Configuration D Link DSL 2640BT User Manual 80 Route information Choose STATUS Route Info The page as shown in the figure appears The table displays destination routes commonly accessed by the network ...

Page 85: ...e the login window 2 How do I reset my Router to the factory default settings Ensure the Router is powered on Press and hold the reset button on the back of the device for about one second This process would take about 1 2 minutes to complete Note Resetting the Router to the factory default settings will erase the current configuration settings To reconfigure your settings log in to the Router as ...

Page 86: ...n the run box type cmd and click OK At the prompt type ipconfig and press Enter This will display the IP address subnet mask and the default gateway of your adapter If the address is 0 0 0 0 check your adapter installation security settings and the settings on your router Some firewall software programs may block a DHCP request on newly installed adapters If you are connecting to a wireless networ...

Page 87: ...ghlight Internet Protocol TCP IP and click Properties Step 4 Click on the Use the following IP address and enter an IP address that is on the same subnet as your network or the LAN IP address on your router Example If the router s LAN IP address is 192 168 1 1 make your IP address 192 168 1 X where X is a number between 2 and 254 Make sure that the number you choose is not in use on the network Se...

Page 88: ...FC2364 PPP over ATM RFC2516 PPP over Ethernet DC Power Input 100V 240V 0 6A 50 Hz 60 Hz Output 12V 1A Data Transfer Rate G dmt full rate downstream up to 8 Mbps upstream up to 1 Mbps G lite ADSL downstream up to 1 5 Mbps upstream up to 512 Kbps G dmt bis full rate downstream up to 12 Mbps upstream up to 1 Mbps ADSL2 full rate downstream up to 24 Mbps upstream up to 1 Mbps Wireless Transfer Rates I...

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