D-Link DSL-2750U User Manual
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D-Link DSL-2750U User Manual

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D-Link DSL-2750U User Manual
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  • Page 1 Table of Contents D-Link DSL-2750U User Manual...

  • Page 2: Table Of Contents

    DNS......................... 63   ....12   ADSL NFORMATION YOU WILL NEED FROM YOUR SERVICE PROVIDER DNS Server....................63   DSL-2750U ..........14   NFORMATION YOU WILL NEED ABOUT Dynamic DNS ..................... 64   ..................16   EVICE NSTALLATION DSL ......................... 65  ...
  • Page 3 USAGE OF USB INTERFACE ................92   ..............92   RIVER UTOMATIC NSTALLATION ..............95   RIVER UTOMATIC NINSTALLATION ................96   RIVER ANUAL NSTALLATION ..............100   RIVER ANUAL NINSTALLATION TECHNICAL SPECIFICATIONS ..............102   D-Link DSL-2750U User Manual...

  • Page 4: Package Contents

     One straight-through Ethernet cable  One Quick Installation Guide Note: Using a power supply with a different voltage rating than the one included with the DSL-2750U will cause damage and void the warranty for this product. System Requirements  ADSL Internet service ...

  • Page 5: Features

    This eliminates the need to reconfigure every host whenever changes in network topology occur.  Network Address Translation (NAT) – For small office environments, the DSL-2750U allows multiple users on the LAN to access the Internet concurrently through a single Internet account. This provides Internet access to everyone in the office for the price of a single user.
  • Page 6  Telnet Connection – The Telnet enables a network manager to access the Router’s management software remotely.  Easy Installation – The DSL-2750U uses a web-based graphical user interface program for convenient management access and easy set up. Any common web browser software can be used to manage the Router.

  • Page 7: Hardware Overview

    Wireless ON/OFF Reset Button Use the adapter shipped with Button On the bottom of the the Router to connect to power Push the button to on/off device，push it to reset wireless function to factory confugration source. D-Link DSL-2750U User Manual...

  • Page 8: Leds

    A steady green light indicates the unit is powered on. When the device is powered Internet off it remains dark. Lights steady green A steady green light indicates a valid during power on self-test (POST) means internet connection. the power connection works properly. D-Link DSL-2750U User Manual...

  • Page 9: Installation

    Before You Begin Please read and make sure you understand all the prerequisites for proper installation of your new Router. Have all the necessary information and equipment on hand before beginning the installation. D-Link DSL-2750U User Manual...

  • Page 10: Installation Notes

    Operating Systems The DSL-2750U uses an HTML-based web interface for setup and management. 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.
  • Page 11 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. D-Link DSL-2750U User Manual...

  • Page 12: Information You Will Need From Your Adsl Service Provider

    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. D-Link DSL-2750U User Manual...
  • Page 13 ADSL service provider’s network and your computer. If you are setting up the Router for multiple virtual connections, you will need to configure the VPI and VCI as instructed by your ADSL service provider for the additional connections. This setting can be changed in the WAN Settings window of the web management interface. D-Link DSL-2750U User Manual...

  • Page 14: Information You Will Need About Dsl-2750U

    IP address used for DHCP service on the LAN when DHCP is enabled. LAN Subnet Mask for the DSL-2750U This is the subnet mask used by the DSL-2750U, and will be used throughout your LAN. The default subnet mask is 255.255.255.0. This can be changed later.

  • Page 15: Information You Will Need About Your Lan Or Computer

    Ethernet NIC If your computer has an Ethernet NIC, you can connect the DSL-2750U to this Ethernet port using an Ethernet cable. You can also use the Ethernet ports on the DSL-2750U to connect to other computer or Ethernet devices.

  • Page 16: Device Installation

    Device Installation The DSL-2750U connects two separate physical interfaces, an ADSL (WAN) and an Ethernet (LAN) interface. Place the Router in a location where it can be connected to the various devices as well as to a power source. The Router should not be located where it will be exposed to moisture or excessive heat.

  • Page 17: Factory Reset Button

    MDI-X ports (1x, 2x, etc.) with a crossed cable. Computer to Router Connection You can connect the Router directly to a 10/100BASE-TX Ethernet adapter card (NIC) installed on a PC using the Ethernet cable provided. D-Link DSL-2750U User Manual...

  • Page 18: Configuration

    Appendix A – Troubleshooting Configuration This section will show you how to configure your new D-Link Router using the web-based configuration utility. Web-based Configuration Utility Connect to the Router The default IP address for ADSL MODEM is: 192.168.1.1; The Subnet Mask is：255.255.255.0. Users can configure ADSL MODEM through an Internet browser.

  • Page 19: Device Info

    Page Cannot be Displayed error, please refer to the Troubleshooting section for assistance. Device Info To access the Device Info window, click either the Device Info or Summary button in the Device Info directory. The following page opens: D-Link DSL-2750U User Manual...
  • Page 20 Appendix A – Troubleshooting D-Link DSL-2750U User Manual...

  • Page 21: Summary

    To access the Router’s first Summary window, click the Summary button in the Device Info directory. This window displays the current status of your DSL connection, including the software version, LAN IP address, and DNS server address. D-Link DSL-2750U User Manual...

  • Page 22: Wan

    Appendix A – Troubleshooting To access the WAN Info window, click the WAN button in the Device Info directory. This window displays the current status of your WAN connection. D-Link DSL-2750U User Manual...

  • Page 23: Statistics

    Statistics button to refresh these statistics. This window displays the Router’s WAN statistics. Click the Reset Statistics button to refresh these statistics. This window displays the Router’s XTM statistics. Click the Reset button to refresh these statistics. D-Link DSL-2750U User Manual...
  • Page 24 Appendix A – Troubleshooting This window displays the Router’s xDSL statistics. Click the Reset Statistics button to refresh these statistics. Click the xDSL BER Test button to access the ADSL Bit Error Rate Test window displayed below: D-Link DSL-2750U User Manual...

  • Page 25: Route

    To access the Device Info – ARP window, click the ARP button in the Device Info directory. This read-only window displays Address Resolution Protocol info. DHCP To access the Device Info – DHCP Leases window, click the DHCP button in the Device Info directory. This read-only window displays DHCP lease info. D-Link DSL-2750U User Manual...

  • Page 26: Advanced Setup

    This window is used to configure the ATM interface. You can add and delete ATM interface on this window. If you are setting up the ATM interface for the first time, click the Add button. ATM Interface D-Link DSL-2750U User Manual...
  • Page 27 DSL Link Type, PPPoA、IpoA and EoA (EoA is for PPPoE, IPoE, and Bridge) Use the drop-down menu to select the desired Encapsulation Mode.. Click the Apply / Save button to Save. D-Link DSL-2750U User Manual...

  • Page 28: Wan Service

    To access the Wide Area Network (WAN) Service Setup window, click the WAN Service button in the Advanced Setup directory. This window is used to configure the WAN interface. You can add and delete WAN interface on this window. If you are setting up the WAN interface for the first time, click the Add button. D-Link DSL-2750U User Manual...
  • Page 29 Appendix A – Troubleshooting The WAN Service Interface Configuration Configuration window allows select a layer 2 interface for this service. Click the Next button to continue. D-Link DSL-2750U User Manual...
  • Page 30 WAN Service Configuration – PPPoE Click the PPP over Ethernet (PPPoE) radio button on this window. This window also allows you to use the drop-down menu to enable IPv6 service. Click the Next button to continue. D-Link DSL-2750U User Manual...
  • Page 31 This window allows you to set the username and the password for your PPP connection. This information is obtained from your ISP. Additional settings on this window will also depend on your ISP. And You can input ip on this page. Click the Next button to continue. D-Link DSL-2750U User Manual...
  • Page 32 WAN interface is connected. Priority order can be changed by removing all and adding them back in again. Click the Next button to continue D-Link DSL-2750U User Manual...
  • Page 33 WAN Service Configuration – PPPoE This summary window allows you to confirm the settings you have just made. Click the Apply / Save button to save your new PPP over Ethernet settings and restart the Router. D-Link DSL-2750U User Manual...
  • Page 34 Appendix A – Troubleshooting WAN Service Configuration – IPoE Click the IP over Ethernet radio button on this window. Click the Next button to continue. D-Link DSL-2750U User Manual...
  • Page 35 Appendix A – Troubleshooting WAN Service Configuration – IPoE This window allows you to configure the WAN IP settings. This information is obtained from your ISP. Click the Next button to continue. D-Link DSL-2750U User Manual...
  • Page 36 WAN interface is connected. Priority order can be changed by removing all and adding them back in again. Click the Next button to continue D-Link DSL-2750U User Manual...
  • Page 37 WAN Service Configuration – IPoE This summary window allows you to confirm the settings you have just made. Click the Apply / Save button to save your new IP over Ethernet settings and restart the Router. D-Link DSL-2750U User Manual...
  • Page 38 Appendix A – Troubleshooting WAN Service Configuration – BRIDGING Click the Bridge radio button on this window. Click the Next button to continue. D-Link DSL-2750U User Manual...
  • Page 39 Click the Apply /Save button to save your new bridging settings and restart the Router. WAN Service Configuration – PPPoA This window allows you to enter service description. Click the Next button to continue. D-Link DSL-2750U User Manual...
  • Page 40 This window allows you to set the username and the password for your PPP connection. This information is obtained from your ISP. Additional settings on this window will also depend on your ISP. And You can input ip on this page. Click the Next button to continue. D-Link DSL-2750U User Manual...
  • Page 41 WAN interface is connected. Priority order can be changed by removing all and adding them back in again. Click the Next button to continue D-Link DSL-2750U User Manual...
  • Page 42 WAN Service Configuration – PPPoA This summary window allows you to confirm the settings you have just made. Click the Apply / Save button to save your new PPP over ATM settings and restart the Router. D-Link DSL-2750U User Manual...
  • Page 43 WAN Service Configuration – IPoA This window allows you to enable or disable Network Address Translation and a firewall for your Router. In addition, you can enable or disable IGMP multicasting. Click the Next button to continue. D-Link DSL-2750U User Manual...
  • Page 44 WAN interface is connected. Priority order can be changed by removing all and adding them back in again. Click the Next button to continue D-Link DSL-2750U User Manual...
  • Page 45 Appendix A – Troubleshooting WAN Service Configuration – IPoA This summary window allows you to confirm the settings you have just made. Click the Save/Reboot button to save your new IP over ATM settings and restart the Router. D-Link DSL-2750U User Manual...

  • Page 46: Lan

    DHCP IP address pool will change automatically if you change the IP address of the Router. To access the Local Area Network (LAN) Setup window, click the LAN button in the Advanced Setup directory. D-Link DSL-2750U User Manual...
  • Page 47 Appendix A – Troubleshooting This window allows you to set up a LAN interface. When you are finished, click the Apply / Save button. D-Link DSL-2750U User Manual...
  • Page 48 To access the IPv6 LAN Auto Configuration window, click the IPv6 AutoConfig button in the LAN directory. This window allows you to set up IPv6 LAN Auto Configuration. When you are finished, click the Apply / Save button. D-Link DSL-2750U User Manual...

  • Page 49: Nat

    Select a Service radio button and then using the drop-down list to choose an existing service, or by clicking the Custom Server radio button and entering your own Application Rule in the field provided. Click Apply / Save when you are finished with the virtual server configuration. D-Link DSL-2750U User Manual...

  • Page 50: Port Triggering

    Custom application radio button and entering your own Application Rule in the field provided. Click Save/Apply when you are finished with the port setting configuration. The new Application Rule will appear in the Port Triggering table. D-Link DSL-2750U User Manual...

  • Page 51: Dmz Host

    To access the Security window, click the Security button in the Advanced Setup directory. The Security button appears after configuring WAN interface in PPPoA, PPPoE, IPoE or IPoA. IP Filtering The IP Filtering button appears when configuring WAN interface in PPPoA, PPPoE, IPoE or IPoA. D-Link DSL-2750U User Manual...
  • Page 52 If you are setting up the outgoing IP filtering, click the Add button. Enter the information in the section. Explanations of parameters are described below. Click the Apply / Save button to add the entry in the Active Outbound IP Filtering table. D-Link DSL-2750U User Manual...
  • Page 53 Now default policy is ACCEPT, it means all incoming IP traffic from WAN is accepted, but some IP traffic can be blocked by setting up filters. If you are setting up the incoming IP filtering, click the Add button. D-Link DSL-2750U User Manual...
  • Page 54 Enter the start IP address which you are creating the filter rule. address[/prefix length] Source Port (port or The Source Port is the TCP/UDP port on either the LAN or WAN depending on if you are configuring an Outbound or port:port) Inbound Filter rule. D-Link DSL-2750U User Manual...

  • Page 55: Parental Control

    LAN device, or click Other MAC Address and enter a MAC address manually. Tick the checkboxes for the desired individual days of the week and enter desired Start Blocking Time and End Blocking Time. Click the Save/Apply button to save the configuration D-Link DSL-2750U User Manual...

  • Page 56: Url Filter

    This window allows you to set up URL Filter on the Router. Choose URL List Type Exclude or Include first and click Add button. Enter the URL address and port number then click Apply / Save to add the entry to the URL filter. D-Link DSL-2750U User Manual...

  • Page 57: Quality Of Service

    To access the QoS – Queue Management Configuration window, click the Quality of Service button in the Advanced Setup directory. This window allows you to set up QoS on the Router. When you are finished, click on the Save/Apply button. D-Link DSL-2750U User Manual...

  • Page 58: Queue Config

    Click the Add button to add a QoS Queue Configuration table entry. This window allows you to configure a QoS queue entry and assign it a specific network interface. Click the Apply / Save button to save and activate the filter. D-Link DSL-2750U User Manual...

  • Page 59: Qos Classification

    Please remember that all of the specified conditions on this window must be met for the rule to take effect. Click the Apply / Save button to save and activate this rule. D-Link DSL-2750U User Manual...

  • Page 60: Routing

    Click the Apply / Save button when you are finished. Static Route Click the Add button on the Routing – Static Route window to access the following window displayed on the next page. D-Link DSL-2750U User Manual...

  • Page 61: Policy Routing

    Enter the static routing information for an entry to the routing table. Click the Apply / Save button when you are finished. Policy Routing Click the Add button on the Policy Routing Settup window to access the following window displayed on the next page. D-Link DSL-2750U User Manual...

  • Page 62: Rip

    'Enabled' checkbox for the interface. Click the Save/Apply button to save the configuration, and to start or stop RIP based on the Global RIP mode selected. D-Link DSL-2750U User Manual...

  • Page 63: Dns

    WAN interface is connected. Priority order can be changed by removing all and adding them back in again. Click the Apply / Save button when you are finished. D-Link DSL-2750U User Manual...

  • Page 64: Dynamic Dns

    DDNS requires that an account be setup with one of the supported DDNS servers prior to engaging it on the Router. This function will not work without an accepted account with a DDNS server. Note D-Link DSL-2750U User Manual...

  • Page 65: Dsl

    This window allows you to select the desired modulation, phone line pair, and capability. Click the Apply / Save button when you are finished. Click the Advanced Settings button to select a DSL test mode. Note: Modulation ADSL2、ADSL2+ and AnnexL should be selected simultaneously D-Link DSL-2750U User Manual...
  • Page 66 Select the desired DSL test mode and then click the Apply button. Click the Tone Selection button to modify the upstream and downstream tones. Select the appropriate upstream and downstream tones for your ADSL connection. Click the Apply button to let your settings take effect. D-Link DSL-2750U User Manual...

  • Page 67: Upnp

    DNS Proxy To access the DNS Proxy Configuration window, click the DNS Proxy button in the Advanced Setup directory. This window allows you to Config DNS Proxy. Click the Apply / Save button when you are finished. D-Link DSL-2750U User Manual...

  • Page 68: Interface Group

    LAN and WAN interfaces using the Add button. The Remove button will remove the grouping and add the ungrouped interfaces to the Default group. Only the default group has IP interface. Click Add to do advanced settings. D-Link DSL-2750U User Manual...
  • Page 69 Appendix A – Troubleshooting To create a new mapping group, enter Group Name, add interfaces to Grouped Interfaces. Click Apply / Save to save the changes. D-Link DSL-2750U User Manual...

  • Page 70: Ipsec

    To access the IPSec Tunnel Mode Connections window, click the IPSec button in the Advanced Setup directory. This window allows you to configure IPSec. Click Add New Connection to edit IPSec tunnel mode connections from this page D-Link DSL-2750U User Manual...
  • Page 71 Appendix A – Troubleshooting This window allows you to advanced settings. D-Link DSL-2750U User Manual...

  • Page 72: Multicast

    Appendix A – Troubleshooting Multicast To access the IGMP Configuration window, click the Multicast button in the Advanced Setup directory. Enter IGMP protocol configuration fields if you want modify default values shown below D-Link DSL-2750U User Manual...

  • Page 73: Wireless

    You can enable or disable the wireless LAN interface, hide the network from active scans, set the wireless network name (also known as SSID) and restrict the channel set based on country requirements. Click "Apply/Save" to configure the basic wireless options. D-Link DSL-2750U User Manual...

  • Page 74: Security

    This page allows you to configure security features of the wireless LAN interface. You may setup configuration manually or through WiFi Protcted Setup(WPS) You can select to configure WEP encryption, Shared, 802.1x, WPA, and WPA2 authentication. D-Link DSL-2750U User Manual...

  • Page 75: Mac Filter

    This page can help you to allow or deny certain MAC addresses to pass through or block out. Click Add to see the following page. Enter MAC Address and click Apply / Save to add the MAC address to MAC filter. D-Link DSL-2750U User Manual...

  • Page 76: Wireless Bridge

    Appendix A – Troubleshooting Wireless Bridge This page allows you to configure bridge features of the wireless LAN. Click Refresh to update the remote bridges. Click Apply / Save to save the settings. D-Link DSL-2750U User Manual...

  • Page 77: Advanced

    Configuring these settings may increase the performance of your router but if you are not familiar with networking devices and protocols, this section should be left at its default settings. Click Apply / Save to save the settings. D-Link DSL-2750U User Manual...

  • Page 78: Station Info

    Appendix A – Troubleshooting Station Info This page shows the authenticated wireless stations and their status. Click Refresh to update the information. D-Link DSL-2750U User Manual...

  • Page 79: Diagnostics

    Appendix A – Troubleshooting Diagnostics Your modem is capable of testing your DSL connection with access to Diagnostics. This window is used to test connectivity of the Router. D-Link DSL-2750U User Manual...

  • Page 80: Management

    Click the Update Settings button to update your Router configurations with a file on your computer. This window allows Restore DSL router settings to the factory defaults. Click the Restore DSL Settings button to restore DSL router settings to the factory defaults. D-Link DSL-2750U User Manual...

  • Page 81: System Log

    Click the View System Log button to view the System Log. Click the Configure System Log button to configure the System Log options. Click on the Refresh button to refresh the system log settings. System Log – Configuration D-Link DSL-2750U User Manual...
  • Page 82 System Log server. The available event severity levels are: Emergency, Alert, Critical, Error, Warning, Notice, Informational, and Debugging. This window allows you to log selected events. When you are finished, click the Apply / Save button. D-Link DSL-2750U User Manual...

  • Page 83: Snmp Agent

    To access the SNMP – Configuration window, click the SNMP Agent button in the Management directory. Simple Network Management Protocol allows a management application to retrieve statistics and status from the SNMP agent in the Router. When you are finished, click the Save/Apply button. D-Link DSL-2750U User Manual...

  • Page 84: Tr-069 Client

    To access the TR-069 Client – Configuration window, click the TR-069 Client button in the Management directory. Simple Network Management Protocol allows a management application to retrieve statistics and status from the TR-069 client in the Router. When you are finished, click the Save/Apply button. D-Link DSL-2750U User Manual...

  • Page 85: Internet Time

    Appendix A – Troubleshooting Internet Time To access the Time settings window, click the Internet Time button in the Management directory. This window allows you to set the Router’s time configuration. When you are finished, click the Save/Apply button. D-Link DSL-2750U User Manual...

  • Page 86: Access Control

    Access Control To access the Access Control windows, click the Access Control button in the Management directory. Passwords This window allows you to change the password on the Router. When you are finished, click the Save/Apply button. D-Link DSL-2750U User Manual...

  • Page 87: Update Software

    To access the Tools - Update Software window, click the Update Software button in the Management directory. This window allows you to update the Router’s software. Reboot To access this window, click the Reboot button in the Management directory. To save your settings and reboot the system, click the Reboot button. D-Link DSL-2750U User Manual...

  • Page 88: Troubleshooting

    Troubleshooting This chapter provides solutions to problems that might occur during the installation and operation of the DSL-2750U. Read the following descriptions if you are having problems. (The examples below are illustrated in Windows® XP. If you have a different operating system, the screenshots on your computer will look similar to the following examples.)
  • Page 89 There might be a potential security issue if you disable the setting of Firewall on your PC. Please remember to turn it back on once you have finished the whole installation procedure and can surf on Internet without any problem. D-Link DSL-2750U User Manual...

  • Page 90: Networking Basics

    Check Your IP Address After you install your new D-Link adapter, by default, the TCP/IP settings should be set to obtain an IP address from a DHCP server (i.e. wireless router) automatically. To verify your IP address, please follow the steps below.

  • Page 91: Statically Assign An Ip Address

    Windows® 2000 - From the desktop, right-click on the My Network Places > Properties. Step 2 Right-click on the Local Area Connection which represents your D-Link network adapter and select Properties. Step 3 Highlight Internet Protocol (TCP/IP) and click on the Properties.

  • Page 92: Usage Of Usb Interface

    It has all the functions of a real network card, and it makes installation more easily. NOTES: The following shows the steps for Windows®2000, the installation, configuration and uninstallation of Windows®98 or Windows®XP are similar to this. Driver Automatic Installation There are two files in the DRIVER-CD. D-Link DSL-2750U User Manual...
  • Page 93 1. Run “setup.exe” in DRIVER-CD and click “Next” button. 2. Click “Install” button to install the driver and wait few seconds. 3. Click “finish” to complete the install. 4. Plug in the power cord, and turn on the power. D-Link DSL-2750U User Manual...
  • Page 94 5. Connect USB port of the Gateway to USB port on your PC with the USB cable that comes with the Gateway. 6. System install the drivers automatically. Notice: If pop up a windows like blow picture, please click “Yes” to allow it. D-Link DSL-2750U User Manual...

  • Page 95: Driver Automatic Uninstallation

    Appendix C – Technical Specification Driver Automatic Uninstallation 1. Run “setup.exe” in DRIVER-CD and click “Next” button. 2. Click “Yes” button to start uninstall the driver. 3. Click “OK” button completed uninstall the driver. D-Link DSL-2750U User Manual...

  • Page 96: Driver Manual Installation

    2. Connect USB port of the Gateway to USB port on your PC with the USB cable that comes with the Gateway. 3. Once the new hardware is detected as shown in the dialog box below, Choice "Search for a suitable driver for my device". Then click "Next" button. D-Link DSL-2750U User Manual...
  • Page 97 5. A new box will pop up for selection of the location of the driver. If the location is incorrect please click "Browse" and select the right location, then click "Next" button. The default location is in the "USB_DRV" folder of the CD. D-Link DSL-2750U User Manual...
  • Page 98 Appendix C – Technical Specification 6. Click "Next" or "Continue" for any dialog box pops up. 7. A message box will show the installation of "USB Remote NDIS Network Device" is complete. Click "Finish" button. D-Link DSL-2750U User Manual...
  • Page 99 8. After the steps above, you will find there is a new item called "USB Remote NDIS Network Device" in "Control Panel"-"System"-"Device Manager"-"Network adapters". And a new "Local Area Connection X" is added in "Network Connections". D-Link DSL-2750U User Manual...

  • Page 100: Driver Manual Uninstallation

    1. Right click the icon of "My Computer" on the desktop, choice "Properties" item on menu pop up. 2. Click "Device Manager" button in "Hardware" page. 3. Double Click the "USB Remote NDIS Network Device" in "Device Manager" dialog box. D-Link DSL-2750U User Manual...
  • Page 101 Appendix C – Technical Specification 4. Click "Uninstall" button in "Driver" page. 5. Click "OK" when the dialog box shown as below to finish the uninstallation. D-Link DSL-2750U User Manual...

  • Page 102: Technical Specifications

     RFC2516 PPP over  RFC1577 Classical IP over (1) This device may not cause harmful interference. Ethernet (2) This device must accept any interference received, including interference that may cause undesired operation. D-Link DSL-2750U User Manual...

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