D Link SL2750BT1 User Manual

DSL-2750B

User Manual

ii

Federal Communication Commission Interference Statement

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used i n accorda nce with the instruct ions, may cause harm ful interfere nce to radio c ommunic ations. However , there is no guar antee that interfere nce wil l not occur in a partic ular in st allat ion. If this equipment does c aus e har mfu l inte rferen ce to r adio or t e levis ion recept ion, w hich ca n b e deter mined by turning t he equ ipm ent off and on, the user is encouraged to try to correct the interference by one of the following measures:

- Reorient or relocate the receiving antenna.

- Increase the separat io n between the equipment and receiver.

- Connect the equipment int o an out l et 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 interference, and (2) this

device must accept any int er ference received, including interference that may cause undesired operation. FCC Caution: Any changes or modifications not expressly approved by the part y responsible for compliance could void t he user 's authority to operate this equipment.

IMPORTANT NOTE: FCC Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. This transmitter must not be co-located or operating in conjunction wit h any other antenna or transmitter.

Table of Contents

1 Safety Precautions ............................................................................................ 1

2 Introduction ........................................................................................................ 1

2.1 LEDs and Interfaces ................................................................................ 2

2.2 System Requirements ............................................................................. 4

2.3 Features ................................................................................................... 4

2.4 Standards Compatibility and Com pl iance ............................................... 5

3 Hardware Installation......................................................................................... 5

3.1 Choosing the Best Locatio n for Wireless Operation ............................... 5

3.2 Connecting the Router............................................................................. 6

4 About the Web Con figur ation ............................................................................ 7

4.1 Preparation Before Login......................................................................... 7

4.2 Logging In to the Router .......................................................................... 8

4.2.1 First-Time Login .......................................................................... 8

4.3 Setup ....................................................................................................... 9

4.3.1 Wizard ......................................................................................... 9

4.3.2 Internet Setup ............................................................................ 18

4.3.3 Wireless Connection ................................................................. 24

4.3.4 Local Network ........................................................................... 29

4.3.5 Time and Date ........................................................................... 31

4.3.6 Print Server ............................................................................... 32

4.3.7 Logout ....................................................................................... 32

4.4 Advanced ............................................................................................... 33

4.4.1 Wireless Settings ...................................................................... 33

4.4.2 Port Forwarding ......................................................................... 42

4.4.3 Port Triggeri ng ........................................................................... 44

4.4.4 DMZ ........................................................................................... 46

4.4.5 Parental Control ........................................................................ 46

4.4.6 Filtering Options ........................................................................ 50

4

.4.7 DNS ........................................................................................... 54

4.4.8 Dynamic DNS ............................................................................ 55

4.4.9 Storag e Service ......................................................................... 56

4.4.10 Multicast .................................................................................... 58

4.4.11 Network T oo ls ............................................................................ 59

4.4.12 Routing ...................................................................................... 71

4.4.13 RIP ............................................................................................ 74

4.4.14 MultiNat ..................................................................................... 74

4.4.15 Schedules ................................................................................. 75

4.4.16 Logout ....................................................................................... 76

4.5 Maintenance .......................................................................................... 77

4.5.1 System ...................................................................................... 77

4.5.2 Firmware Update....................................................................... 78

4.5.3 Access Controls ........................................................................ 78

4.5.4 Diagnostics ................................................................................ 81

4.5.5 System Log ............................................................................... 82

4.5.6 Logout ....................................................................................... 82

4.6 Status ..................................................................................................... 83

4.6.1 Device Info ................................................................................ 83

4.6.2 Wireless Clients ........................................................................ 84

4.6.3 DHCP Clients ............................................................................ 84

4.6.4 Logs ........................................................................................... 85

4.6.5 Statistics .................................................................................... 86

4.6.6 Route info .................................................................................. 87

4.6.7 Logout ....................................................................................... 87

5 FAQs ................................................................................................................ 88

DSL-2750B User Manual i

1 Safety Precautions

Follow the following instructions to prevent the device from risks and damage caused by fire or electric power:

 Use volume labe ls t o mark the type of power .  Use the power ada pt er packed within the device pack age.  Pay attention to the power load o f the outlet or prolonged lines. An overburden power outlet or dam aged lines and plugs may cause electric shock or fire accident.

Check the power cords regul ar ly. If you find any damage, replace it at once.

 Proper space left for heat dissipation is necessary to avoid damage caused by overheating to the device. The long and thin holes on the device are designed for

heat dissipation to ensure that the dev ice w orks normally. Do not cover these heat dissipation holes.

 Do not put this dev ice close to a place where a heat source exists or high temperature occurs. Avoid the device from direct sunshine.  Do not put this device close to a place where it is over damp or watery . Do not spill any fluid on this device.  Do not conne ct t his dev ice to any PCs or electronic product s, u nless our c ust omer eng ineer or your broa dband pr ovi der i nstruct s y ou to d o t his, becaus e a ny wrong

connection may cause power or fire risk.

 Do not place this d evice on an unstable surface or support.

2 Introduction

The DSL-2750B is a highly integrated ADSL2/2+ Integrated Access Device. It provides DSL uplink, Ethernet LAN and wireless LAN services. The wireless LAN is complied with the IEEE802.11b/g /n standards and supports 2T2R. It is usually prefered to provide high access performance applications for the individual users, the SOHO, the small enterprise and so on.

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2.1 LEDs and Interfaces

The LED indicators are as follows from left to right: Power, LAN1/2/3/4, WLAN,

LED

Color

Status

Description

Off

The power is off.

The power is on and the initialization is normal.

On

The device is initiating.

Blinks

The firmware is upgrading.

Off

No LAN link.

Data is being transmitted through the LAN interface.

On

The connection of LAN inter face is normal.

Data is transmitted through the WLAN interface.

On

The connection of WLAN int er face is normal.

The connection of USB fla sh disk has established.

Blinks

The device is detecting itself.

On

Initial self-test of the unit has passed.

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

On

IP is connected and no traffic is detected.

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

WPS (on the side panel)

WPS negotiation is enabled, waiting for the clients.

Off

Device is ready for new WPS to setup.

Front Panel

USB, DSL, Internet. The WPS indicator is on the side panel. The following table describes the LEDs of the device.

Green

Power

Red

LAN 1/2/3/4 Green

On

Blinks

WLAN Green

Off The WLAN connection is not established. On

USB Green

Blink Data is being trans mitted. Off No signal is detected. Off Initial self-test is failed.

DSL Green

Green

Off

Internet

Red On

Green

Blinks

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Rear Panel

Interface/Button

Description

RJ-11 interface that connect s to the t e lephon e set t hr ough the telephone cable.

Ethernet RJ-45 interfaces that connect to the Ethernet interfaces of computers or Et her net devices.

USB

USB host port, for connecting the USB storage devices.

WIRELESS ON/OFF

Reset to the factory defaults. To restore factory defaults,

release.

ON/OFF

Power on or off.

Interface that connects to the power adapter. The power adapter output is: 12 V DC, 1 A.

side panel)

DSL LAN4/3/2/1

Button to enable or disable WLAN.

RESET

POWER WPS (on the

keep the device powered on and push a paper clip into the hole. Press down the but t on for one second, and then

WPS button to setup connect ion to client.

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2.2 System Requirements

Recommended system requirements are as follows:

 An 10 baseT/100BaseT Ethernet card is inst al led on your PC  A hub or switch (attached to several PCs through one of Eth er net interfaces on the device)  Operating system: Windows 98SE, Windows 2000, Windows ME, Windows XP, Windows Vista or Windows 7  Internet Explorer V5.0 or higher, Netscape V4.0 or higher, or Firefox 1.5 or higher

2.3 Features

The device supports the following features:

 User-friendly GUI for web configuration  Several pre-configured popular games. Just enable the game and the por t settings are automatically configured.  Compatible with al l standard Internet applications  Industry standard an d interoperable DSL interfac e  Simple web-based status page display s a snapshot of system configuration, and links to the configuration pages  Downloadable flash software updates  Support for up to 8 permanent virtual circuits (PVC)  Support for up to 8 PPPoE sess io ns  Support RIP v1 & RIP v2  WLAN with high-speed data transfer rates of up to 130 Mbps, compatible with IEEE 802.11b/g/n, 2.4GHz compliant equipment  Optimized Linux 2.6 Operating System  IP routing and bridging  Asynchronous transfer mode ( AT M ) and digital subscriber line (D SL) support  Point-to-point protocol (PPP)  Network/port address translati on ( N AT/PAT)  Quality of service (QoS)  Wireless LAN security: WPA, 802.1x, RADIUS client  Universal plug-and-play(UPnP)  File server for network attached storage (NA S) devices  Print server  Web filtering  Management and control

- Web-based management (WBM)

- Command line interface (CLI)

- TR-069 WAN management protocol

 Remote update  USB mass-storage  System statistics and monitoring

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2.4 Standards Compatibi lity and Compliance

 Support application level gateway (ALG)  ITU G.992.1 (G.dmt)  ITU G.992.2 (G.lite)  ITU G.994.1 (G.hs)  ITU G.992.3 (ADSL2)  ITU G.992.5 (ADSL2+)  ANSI T1.413 Issue 2  IEEE 802.3  IEEE 802.3u  IEEE 802.11b  IEEE 802.11g  IEEE 802.11n

3 Hardware Installation

3.1 Choosing the Best Location for Wir el ess Operation

Many environmental factors may affect the effective wireless function of the DSL Router. If this is the first time that you set up a wireless network device, read the following information: The access point can be placed on a shelf or desktop, ideally you should be able to see the LED indicators in the front, as you may need to view them for troubleshooting. Designed to go up to 100 meter s indoors and up to 300 meters outdo or s , wireless LAN lets you access your network from anywhere you want. Howev er, the numbers of walls, ceilings, or other objects that the wireless signals must pass through limit signal range. Typical ranges vary depending on types of materials and background RF noise in your home or busines s.

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3.2 Connecting the Router

Connect the DSL port of the router and the Modem port of the splitter with a telephone cable; connect the phone to the phone port of the

(1)

splitter through a cable; and connect the incoming line to the Line port of the splitter.

The spliiter has three ports:

 LINE: Connect to a w al l phone jack (RJ-11 jack)  Modem: Connect to the Line interface of the router  PHONE: Connect to a telephone set

(2) Connect the LAN port of the router to the network interface card (NIC) of

the PC through an Ethernet cable (MDI/MDIX).

(3) Plug the power adapter to the wall outlet and then connect the other end

of it to the Power port of the router.

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Configure the IP address of the PC as 192.168.1.X (2~254), net mask as

.1 (for customized version,

configure them according to the actual version).

Enter arp -a in the DOS window to check whether the PC can read the MAC

Ping the MAINTENANCE IP address (192.168.1.1 by default) of the Router.

4 About the Web Configuration

The first time you setup the Router. It is recommended that you configure the WAN connection using a single computer, to ensure that both the computer and the Router are not connected to the LAN. Once the WAN connection operates properly, you may continue to make changes to Router configuration, including IP settings and DHCP setup. This chapter is concerned with using your computer to configure the WAN connection. The following chapter describes the various menus used to configure and monitor the Router, including how to change IP settings and DHCP server setup.

4.1 Prep aration Before Login

Before accessing the Routerre the communication between PC and Router is normal. Check the commu nication as follows.

255.255.255.0, gateway address as 192.168.1

address of the Router.

If the PC can read the MAC address of the Router and can ping through the MAINTENANCE IP address of the Router, that means the communication of the PC and the Router is nor ma l.

Note:

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When you manage the Router through Web, you mu st k eep t he Router power on. Otherwise, the Router may be damaged.

Step 1

Step 4 Click Login to log in.

4.2 Logging In to the Router

The following description i s a detail “How-To” user guide and is prepared for first time user s.

4.2.1 First-Time Login

When you log in to the DSL Router for t he f irst time, the login wizard appears.

Open a Web browser on your co mp ut er .

Step 2 Enter http://192.168.1.1 (DSL router default I P address) in the

address bar. The login page appears.

Step 3 Enter a user name an d t he password. The default usernam e and

password of the super user ar e admin and admin. The username and password of the common user ar e user and user. You need not enter the username and pass w or d again if you select the option Remember my pass wor d. It is recommended to change these default values after logging in to the DSL router for the first time.

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Choose Setup > Wizard. The page shown in the fig ur e appears.

Click Setup Wi zard. The page shown in the right figure appears.

4.3 Setup

4.3.1 Wizard

Wizard enables fast and accurate configuration of Internet connection and other important parameters. The following sections describe these various c onfigur ation

parameters. When subscribing to a broadband service, you should be aware o f the method, by which you are connected t o the Internet . Your physical WAN dev ice 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 Internet.

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There are four steps 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.

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Set the time and date.

Configure the Internet connection.

You can select

First NTP time server: Select the domain of the time server to which system time will be synchronized.

Select the country and ISP. Set the VPI and VCI. If you fail t o find the country and ISP from the drop-down lists, select Others.

 Protocol: The protocol connection type of the interface.

PPPoE, PPPo A, Dynamic IP, St a t ic IP, or Bridge.

 Connection Type: You can select it from the drop-dow n list acc ordi ng to t he

uplink equipment. You can select LLC or VC-Mux.

 VPI: The virtual path identifier of the WAN interface (provided by your ISP).

The range is 0 to 255.

 VCI: The virtual channel identifier for the WAN interface. The range is 32 to

65535 (1 to 31 are reserved for know n pr otocols).

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If the Protocol is PPPoE or PPPoA, the page s how n i n e i the r of the two figures

appears.

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Set the user name and password as provided by your ISP.

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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.

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After proper configur at ion, click Next.

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Configure the wireless network, or keep the default settings. Enter the

: SSID is the name of your wireless

equipped devices share the same SSID to

communicate with each other. It must be unique to identify separated

uld change the default SSID to a

In order to protect your network from hackers and

unauthorized users, it is highly recommended you choose one of the

key here into your wireless clients in order to enable proper wireless

information and click Next.

 Enable Yo ur Wirel ess Net work: Enable wire less settings on LA N interface.  Wireless Network Name (SSID)

network. All wirelesswireless network. For security, you sho

special ID.

 Visibility Status: You can select visible or invisible.  Security Level:

following wireless network security settings.

 W PA Pre-Shared Key: Please set it. Then you will need to enter the same

connection.

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The page shown in the right figure appears. In this page, you can view the

configuration information. You can check weather the configurations match the information provided by your I SP.

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4.3.2 Internet Setup

Choose Setup > Internet Setup. The page as shown in the right figure

appears. In this page, you can configure the WAN in terface of the device.

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Click Add in “INTERNET SETUP”. The page shown in the following figure

appears.

Field

Description

reserved for local manage me nt of ATM traf f ic) .

You can select from the drop-down list.

QoS scheduler

You can select one of the item between Strict Priority and Weighted Fair Queuing.

Select the method of encapsulation provided by your

PVC Settings

 The virtual path between tw o points in an ATM

network and its valid value is from 0 to 255.

 The virtual channel between tw o points in an A TM

network, ranging from 32 t o 65535 (0 to 31 is

Service Category

Protocol

Encapsulati

ISP. You can select from the drop-down list.

on Mode

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Click Next, the page shown in the f ol low i ng figure appears.

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If you select the PPP over Ethernet (PPPoE) or PPP over ATM (PPPoA) as

The value can be AUTO, PAP, CHAP, or

IP address

the connection protocol, t he fo ll ow ing page appears.

 PPP Username: The correct user name that y our ISP provides to you.  PPP Pas s wor d : The corr ect password that your ISP provides to you.  Authentication Method:

MSCHAP. Usually, you can select AUTO.

 Dial on demand (with idle timeout timer): If thi s function is enabled,

you need to enter the idle timeout time. Within the preset minutes, if the router does not detect the flow of the user continuously, the router automatically stops the PPPoE connection. Once it detects the flow (like access to a webpage), the router restarts the PPPoE dialup.

If this function is disabled, the router performs PPPoE dial-up all the time. The PPPoE connnection does not stop, unless the router is powered off and DSL AM or uplink equipment is abnormal.

 MTU Size: Maximum Transmission Unit. Sometimes, you must modify

this function to access network successfully.

 PPP IP extension: If this function is enabled, the WAN

obtained by the router through built-in dial-up can be directly assigned to the PC being attached to the router ( at this time, the router connects to only one PC). From the aspect of the PC user, the PC dials up to obtain an IP addres. But actually, the dial-up is done by the router. If this function is disabled, the router itself obtains the WAN IP address.

 Use Static IP Address: If this function is disabled, the router obtains an

IP address assigned by an uplink equipment such as BAS, through PPPoE dial-up.

If this function is enabled, the router uses this IP address as the WAN IP address.

 Enable NAT : Select it t o enable the NAT functions of the router. If you do

not want to enable NAT and wish the router user to access the Internet normally, you must add a route on the uplink equipment. Otherwise, the access to the Internet fails. Normally, NAT should be enabled.

 Enable Firewall: Enable or disable IP filtering.  Enable IGMP Multicast: IGMP proxy. For example, if you w ish that the

PPPoE mode support s I PTV, enable this function.

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If you select the MAC Encapsulation Routing(MER) as the connection

protocol, the following p age appears.

 Obtain an IP address automatically: The modem obtains a W AN IP

address automatically and at this time it enables DHCP client functions. The WAN IP addre ss is obtained from the uplink equipment like BAS and the uplink equipment is re quired to enable the DHCP server functions.

 Use the followi ng IP addr ess: If you want to manually enter t he WAN IP

address, select this check box and enter the information in the field.

 W A N IP A ddress: Enter the IP ad dress of th e WAN interfac e prov ided by

your ISP.

 WAN Subnet Mask: Enter the subnet mask concerned to the IP address

of the WAN interface provided by your ISP.

 Default Gateway: Enter the de fau lt gat ew ay.  Obtain DNS info automatically from WAN interface: You can get DNS

server information fro m the selected WAN interface

 Use the following S t atic D NS IP addre ss: If you want to manually enter

the IP address of the DNS server, select this check box and enter the information in the fields.

 Primary DNS server: Enter the IP address of the primary DNS server.  Secondary DNS server: Enter the IP address of the secondary DNS

server provided by your ISP.

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After proper settings, click Next.

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4.3.3 Wireless Connection

This section includes the wireless connection setup wizard and WPS setup

or you can manually configure the

wizard. There are two ways to setup your wireless connection. You can use the

Wireless Connection Setup Wizard

connection. Choose Setup > Wireless Connection. The Wireless Connection page shown in the following figure appears.

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4.3.3.1 Wireless Wizard

In Wireless Connection page, Click “Wireless Connection Setup Wizard”,

If you select “Use WPA encryption instead of WEP” and “Manually assign a

the page shown in the follow ing figure appe ars.

network key”, click “Next”, the page shown in the following figure appears.

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If you only select “Manually assign a network key”, click “Next”, the page

shown in the following figure appears.

After you enter the network key , the page shown in the follow ing figur e appear s ,

you can confirm the wireless settings in this page. Click Save to save the settings.

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4.3.3.2 Wireless Device Add

In Wireless Connection page, Click Add Wireless Device with WPS, the

Select Auto, click Next, the page shown in the follo wing figure appears.

Select Manual, click Next, the page shown in the fo llowing figure appears.

page shown in the following figure appears.

When PIN is used, users are only allowed to enter no more than eight digits in the field.

It displays the current wireless setti ngs and you can manually enter the settings in the wireless device that’s to be added in the wireless network.

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In Wireless Connecti on page, Click Reset to Unconfigured, the p age shown

4.3.3.3 Manual Wireless Setup

If you want to configure the Internet settings of you new D-Link Router manually, click Manual Wireless Connecti on Setup. It will redirect to 4.4.1 Wireless Settings.

4.3.3.4 WPS Reset to Unconfigured

in the following figure app ear s. Once the “Reset to Unconfigured” button is clicked, the “wireless settings” will be reset to factory default, other settings will remain unchanged.

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4.3.4 Local Network

Choose Setup > Local Network. The Local Network page shown in the

You can configure the LAN IP address according to the actua l app licati on. The preset I P ad dress is 192.168.1.1. You can use the default settings and DHC P serv ice to manage the IP settings for the private network. The IP 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 co mpat ible wit h the IP address of the device. The IP address av ailable in the DHCP IP addre ss pool changes automatically if you change the IP address of the device. You can also enable the secondary LAN IP address. The t w o LAN IP addresses must be in dif ferent networks.

following figure appears.

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By default, Enable DHCP Server is selected for the Ethernet LAN

interface of the device. DHCP service supplys IP settings to workstations

f you

In the Local Network page, you can assign IP addresses on the LAN to

Click Add to add static DHCP (optional). The page shown in the following

configured to automatically obtain IP settings that are connected to the device through the Ethernet port. When the device is used for DHCP, it becomes the default gateway for DHCP client connected to it. I change the IP addre ss of the dev ice, y ou must also c hange t he range o f IP addresses in the pool used for DHCP on the LAN. The IP address pool can contain up to 253 IP addresses. Click Apply to save the settings.

specific individual computers based on their MAC addresses.

figure appears. Select Enable to reserve the IP address for the designated PC with th e configured MAC address. The Computer Name helps you to recognize the PC with the MAC address. For example, Father’s Laptop. Click Apply to save the settings. After the DHCP reservation is saved, the DHCP reservations list displays the configuration. If the DHCP reservations list table is not empty, you can select one or more items and click Edit or Delete.

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4.3.5 Time and Date

Choose Setup > Time and Date. The page shown in the following figure

appears. In the Time and Date page, you can configure, update, and m aintai n the corre ct time on the internal system clock. You can set the time zone that you are in and the network time protocol (NTP) server. You can also configure daylight saving to automatically adjust t he time when needed. Select Automatically sy nchr onize with Internet time servers. Select the specific time server and the time zone from the corresponding drop-down lists. Select Enable manual Daylight Saving,overwrite automatic rule if necessary. Set the daylight as you want. Click Apply to save the settings.

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4.3.6 Print Server

Choose Setup > Print Server. The page show n in the following figure appears.

Select Enable on-board print server, the page shown in the following figure

Choose Setup > Logout. The page shown in the following figure appears. In

appears.

 Printer name: can be any text st r ing up to 80 c haracters.  Make and model: can be any text string up to 80 characters.

Click Save/Apply to save the settings.

4.3.7 Logout

this page, you can log out of the configuration page.

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Choose ADVANCED > Wireless Settings. The page shown in the following

4.4 Advanced

This section includes advanced features used for network management, security and administrative tools to manage the device. You can view status and other information that are used t o examine performance and troubleshoot .

4.4.1 Wireless Settings

This function is used to modi fy the standard 802.11 wireless radio settings. It is recommended not to change the default settings, because incorrect settings may imp air the performance of your wirel ess r adio. The default settings prov ide the best wireless radio performance in most environments.

figure appears.

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4.4.1.1 Wireless Basics

In the Wireless Settings page, click Wireless Basic, the page shown in

In this page, you can configure the

that identifies a network. All devices on a network

must share the same wireless network name in order to network name from the default setting, enter your new wireless

the following figure appears. parameters of wirel ess LAN clients that may connect t o t he device.

 Enable Wireless: Select this to turn Wi-Fi on and off.  Wireless Net wo r k Name (SSID): The Wireless Network Name is a

unique name communicate on the network. If you decide to change the wireless network name in this field.

 Visibility Status: You can select Visible or Invisible.  Country: Select the count r y from the drop-down list.  Wireless Channel: Select the wireless channel from the pull-down

menu. It is different for different countries.

 802.11 Mode: Select the appropriate 802.11 mode based on the

wireless clients in your network. The drop-down menu options are

802.11n auto, 802.11g only, Mixed 802.11g and 802.11b, or 802.11b only.

 Bandwidth

: You can select it from the drop-down list:

Click Apply to save the settings.

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4.4.1.2 Advanced Settings

In the Wireless Settings page, click Advanced settings, the page shown in

network. You can select from a range of transmission

Fallback feature.

not set the

etting of

TS threshold size, the RTS/CTS

not be enabled. The Router sends Request to Send

transmission. The RTS Threshold value should remain at its default

(Delivery Traffic Indication Message) Enter a value

and readiness. A beacon interval is a period of time (sent with the

the following figure appears.

 Multicast Rate: Select the multicast transmission rate for the network.

The rate of data transmission should be set depending on the speed of your wireless speeds, or you can select Auto to have the Router automatically use the fastest possible data rate and enable the AutoAuto-Fallback will negotiate the best possib le connection speed between the Router and a wireless client. The default value is Auto.

 Fragmentation Threshold: Packets that are larger than this threshold

are fragmented into multiple packets. Try to increase the fragmentation threshold if you encounter high packet error rates. Do threshold too low, since this can result in reducing networking performance.

 RTS Threshold: This value should remain at its default s

2347.Should you encounter inconsistent data flow, only minor reductions are recommended. Should you encounter inconsistent data flow, only minor reduction of the default value, 2347 is recommended. If a network packet is smaller than the preset R mechanism will (RTS) frames to a particular receiving station and negotiates the sending of a data frame. After receiving an RTS, the wireless station responds with a Clear to Send (CTS) frame to acknowledge the right to begin

value of 2347.

 DTIM Interval:

between 1 and 255 for the Delivery Traffic Indication Message (DTIM.) A DTIM is a countdown informing clients of the next window for listening to broadcast and multicast messages.

 Beacon Interval: A beacon is a packet of information that is sent from a

connected device to all other devices where it announces its availability beacon) before sending the beacon again. The beacon interval may be

adjusted in milliseconds (ms). Default (100) is recommended.

 Global Max Clients: Specifies maximum wireless client stations to be

enble to link with AP. Once the clients exceed the max vlaue, all other

DSL-2750B User Manual 35

clients will be refused.

 Transmit Power: Adjust the transmission range here. This tool can be

The Wireless Network Name is a

ly for more technically advanced users who have

sufficient knowledge about wireless LAN. Do not change these settings

helpful for security purposes if you wish to limit the transmission range.

 WMM (Wi-Fi Mult imedia): Select whether WMM is enable or disabled.

Before you disable W MM, you should understand that all QoS queues or traffic classes related t o w irel es s do not take effect.

 Enable Wireless: Select this to turn Wi-Fi on and off.  Wireless Network Name (SSID):

unique name that identifies a network. All devices on a network must share the same wireless network name in order to communicate on the network. If you decide to change the wireless network name from the default setting, enter your new wireless network name in this field.

 Visibility Status: You can select Visible or Invisible.  User Isolation: W hen many clients connect to the same access point,

they can access each other. If you want to disable the access between clients which connect the same access point, you can select On to enable this service.

 Disable WMM Advertise: You can select On or Off from the drop-down

list.

 Enable Wireless Multicast Forwarding (WMF): You can select On or

Off from the drop-down lis t .

 Max Clients: Specifies maximum wireless client stations to be enble to

link with AP.

 GUEST/VIRTUAL ACCESS POINT: If you want to make Guest/Virtual

network function be avai la ble, you can set the parameters below.

These settings are on unless you know the ef fe ct of changes on the device.

Click Apply to save the settings.

DSL-2750B User Manual 36

4.4.1.3 MAC Filtering

In the Wireless Settings page, click MAC Filtering, the page shown in the

Click Add, the page shown in the following figure appears.

following figure appears. In this page, you can allow or deny users access the wireless router based on their MAC address.

DSL-2750B User Manual 37

4.4.1.4 Security Settings

In the Wireless Settings page, click Security Settings. The page shown in the

following 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, WPA-Personal and WPA-Enterprise.

DSL-2750B User Manual 38

If you select WEP, the page shown in the following figure appears.

WEP (Wireless Encryption Protocol) encryption can be enabled for security and privacy. WEP encrypts the data portion of each frame transmitted from the wireless adapter using one of the predefined keys. The router offers 64 or 128 bit encryption with four keys available. Select Encryption Strength from the drop-down menu. (128 bit is stronger than 64 bit) Enter the key into the Network Key field 1~4. (Key length is outlined at the bottom of the window.) Click Apply/Save to save the settings.

DSL-2750B User Manual 39

If you select WPA-Personal, the page shown in the following figur e appears.

DSL-2750B User Manual 40

If you select WPA- Enterprise, the page shown in the following figure appears .

You can only use WPA-enterprise if you have set up RADIUS server. This is the WP A/WPA 2 authentication with RADIUS serv er instead of pre-shared key .

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4.4.2 Port Forwarding

This function is used to open ports in your device and re-direct data through

those ports to a single PC on your network (WAN-to-LAN traffic). It allows remote users to access services on your LAN, such as FTP for file transfers or SMTP and POP3 for e-mail. The device accepts remote requests for these services at your global IP address. It uses the specified TCP or UDP protocol and port number, and redirects these requests to the server on your LAN with the LAN IP address you specify . Note that t he specified private IP address must be within the available ran ge of the subnet where the device is in. Choose ADVANCED > Port Forwarding. The page shown in the following figure appears.

DSL-2750B User Manual 42

Click Add to add a virtual server.

Select a service for a preset application, or enter a name in t he Custom Server

to appoint the

field. Enter an IP address in the Server IP Address field, corresponding PC to rec ei ve forwarded packets. The Ports show the ports that you want to open on the device. The TCP/UDP means the protocol type of the opened ports.

DSL-2750B User Manual 43

Click Apply to save the settings. The page shown in the following figure

appears. A virtual server is added.

Some applications require that specific ports in the firewall of the device are

4.4.3 Port Trigge ring

open for the remote parties to access. Application rules dynamically open the firewall ports when an app lication on t he LAN initiat es a TCP/U DP co nnectio n 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 t he follow ing f igur e appears.

DSL-2750B User Manual 44

Click Add to add a new Port Trigger.

Click the Select an application drop-down menu to choose the application you want to setup for port triggering. When you have chosen an application the default Trigger settings will populate the table below. If the application you want to setup isn’t listed, click the Custom application radio button and type in a name for the trigger in the Custom application field. Configure the Trigger Port Start, Trigger Port End, Trigger Protocol, Open Port Start, Open Port End and Open Protocol settings for the port trigger you want to configure. When you have finished click the Apply button.

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4.4.4 DMZ

Since some applications are not compatible with NAT, the device supports the

on) to protect the remaining client PCs on your LAN from possible

Choose ADVANCED > Parental Control. The Parent Control page shown in

use of a DMZ IP address for a single host on the LAN. This IP address i s not protected by NAT and it is visible to agents on the Internet with 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 protecti contamination through D MZ. Choose ADVANCED > DMZ. The page show n in the following figure appears. Click Apply to save the settings.

4.4.5 Parental Control

the following figure appears. This page provides two useful tools for restricting the Internet access. Block Websites allows you to quickly create a list of all websites t hat you wish to stop users from accessing. Block MAC Address allows you to control when clients or PCs connected to the device are allowed to access the Internet.

DSL-2750B User Manual 46

4.4.5.1 Block Website

In the Parent Control page, click Block Website. The page shown in the

Click Add. The page shown in the following page appears.

following figure 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.

DSL-2750B User Manual 47

Click Apply to add the website to the BLOCK WEBSITE table.The page shown

in the following figure appears.

In the Parent Control page, click Block MAC Address. The page shown in the

4.4.5.2 Block MAC Address

following figure appears.

DSL-2750B User Manual 48

Click Add. The page shown in the following fig ur e appears.

Enter the use name and MAC address and select the corresponding time and

Click Apply to add the MAC addr ess to the BLOCK MAC ADDRESS table. The

days.

page shown in the following figure appears.

DSL-2750B User Manual 49

4.4.6 Filtering Options

Choose ADVANCED > Filtering Options. The Filtering Optio ns page shown

In the Filtering Options pa ge, cl ick Inbound IP Filtering. The page shown in

in the following figure appear s.

4.4.6.1 Inbound IP Filtering

the following figure appears.

DSL-2750B User Manual 50

Click Add to add an inbound IP filter. The page shown in the following figure

appears. Enter the Filter Name and specify at least one of the f ol low i ng criteria: protocol, source/destination IP address, subnet mask, and sour ce/ destination port. Click Apply to save the settings. The A CTI VE I NBOUND FILTER shows detail ed informat ion about each cr eate d inbound IP filter.

Note:

The settings only apply when the firewall is enabled.

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4.4.6.2 Outbound IP Filtering

By default, all outgoing IP traffic from the LAN is allowed. The outbound filter

Click Add to add an outbound IP filter. The page shown in the following f igure

allows you to create a filter rule to block outgoing IP traffic by specifying a filter name and at least one condition. In the Filtering Opt ions page, click Outbo und I P Fi lt eri ng. The p age sh ow n in the following figure appears.

appears. Enter the Filter Name and specify at least one of the f ol low i ng criteria: protocol, source/destination IP address, subnet mask, and source/destination port. Click Apply to save the settings. The ACTIVE OUTGOING IP FILTER shows detailed information about each created outbound IP fi lter.

DSL-2750B User Manual 52

4.4.6.3 Bridge Filteri ng

In the Filtering Options page, cl ick Bridge Filt ering. The page shown in the

following figure appears. This page is used to configure bridge parameters. In this page, you can change the settings or view some information of the bri dge and its attached por ts.

DSL-2750B User Manual 53

Click Add to add a bridge filter. The pag e show n in the follow ing figur e app ears .

Click Apply to save the settings.

Domain name system (DNS) is an Internet service that translates domain

corresponding IP address. For example, the domain name

4.4.7 DNS

names into IP addresses. Because domain names are alphabetic, they are easier to remember. The Internet, however, is actually based on IP addresses. Each time you use a domain name, a DNS serv ice mu st t ranslate the na me into the www.example.com might be translated to 198.105.232.4. The DNS system is, in fact, its own network. If one DNS server does not kn ow how to translate a particular domain name, it asks another one, and so on, until the correct IP addres s is returned. Choose ADVANCED > DNS. The page shown in the folllowin g figure appears.

DNS SERV ER CO NFI G U RATION

If you are using the devic e for DHCP ser vice on t he LAN or i f you are using D NS servers on the ISP network, select Obtain DNS Info from a WAN interface. If you have DNS IP addresses provided by your ISP, enter these IP addresses in the available entry fields for the preferred DNS server and the alternate DNS server. Click Apply to save the settings.

DSL-2750B User Manual 54

4.4.8 Dynamic DNS

The device supports dy na mic dom ain na me serv ice (DDNS). The dynamic DNS

up with one of the supported DDNS service providers

Click Add to add dynamic DNS. The page shown in the following figure

service allows a dynamic public IP address to be associated with a static host name in any of the many domains, and allows access to a specified host from various locations on the Internet. Click a hyperlinked URL in the form of hostname.dyndns.org and allow remote access to a host. Many ISPs assign public IP addresses using DHCP, so locating a specific host on the LAN using the standard DNS is difficult. 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 (DyndDNS.org or dlinkddns.com). Choose ADVANCED > Dynamic DNS. The page shown in the following page appears.

appears.

 DDNS provider: Select one of the DDNS registration organizations from

the down-list drop.

 Host Name: Enter the host name that you registered with your DDNS

service provider.

 Interface: Select the inter f ac e you want to use.  Username: Enter t he user name for your DDNS account.  Password: Enter the password for your DDNS account.

Click Apply to save the settings.

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4.4.9 Storage Service

Choose ADVANCED > Storage Service. The Storage Service page shown in

n the Storage Service page, click Storage Device Info. The page shown in the

information of USB

the following figure appear s.

4.4.9.1 Storage Device Info

following figure appears. When you insert USB storage, this page will show the storage, such as file system, t otal space and used space.

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4.4.9.2 User Accounts

In the Storage Service page, click Storage User Account. The page shown in Click Add to add a user. The page shown in the following figure appears.

the following figure appears.

 Username:set valid user that access CPE’s samba serv er  Password:user’s password  Confirm Password:user’s password  volumeName:the director y you want to share

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4.4.10 Multicast

Choose ADVANCED > Multicast. The page shown in the following figure

maximum amount of time in seconds that the IGMP router waits to

um Response Time field in the IGMP v2 Host

Membership Query message header. The default query response

interval is also the amount of time in seconds between successive

susceptible the subnet is to lost packets. IGMP can recover from

max group data

appears.

 Default Version:IGMP version  Query Interval(s):The query interval is the amount of time in seconds

between IGMP General Query messages sent by the router (if the router is the querier on this subnet )

 Query Response Interval (1/10s): The query response interval is the

receive a response to a General Query message. The query response interval is the Maxim

interval is 10 seconds and must be less than the query interval

 Last Member Query Interval (1/10s): The last member query interval is

the amount of time in seconds that the IGMP router waits to receive a response to a Group-Specific Query message. The last member query

Group-Specific Query messages.

 Robustness Value: The robustness variable is a way of indicating how

robustness variable minus 1 lost IGMP packets.

 Maximum Multicast Groups:max multicast group s  Maximum Multicast Data Sources (for IGMPv3):

sources that want to receive.

 Maximum Multicast Group Members:Max member in one group  Fast Leave Enabl e: Enable or disable fast leave feature.  LAN t o LAN ( Intra LAN) Multicast Enable: Enable or disable Lan to

Lan msulticast.

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4.4.11 Network Tools

Choose ADVANCED > Network Tools. The page shown in the

following figure appears.

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In the NETWORK TOOLS page, you can configure port mapping,

IGMP, quality of service,

queue, QoS classification, UPnP, ADSL

069, and certificates through clicking the

settings, SNMP, TRnavigation.

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4.4.11.1 Port Mapping

Choose ADVANCED > Network Tools and click Port Mapping. The page

shown in the following figure appears. In this page, you can bind the WAN interface and the LAN inte rface t o t he same group.

DSL-2750B User Manual 61

Click Add to add port mapping. The page sh own in the following figure appears.

The procedure for creating a ma pping group is as follows:

Step 1 Enter the group name. Step 2 Select the WAN interface for your new group. Step 3 Select LAN interfaces from the Available Interface 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 4 Enter the option information of DHCP vendor IDs. Step 5 Click Apply to save the settings.

DSL-2750B User Manual 62

DSL-2750B User Manual 63

4.4.11.2 IGMP

Choose ADVANCED > Network Tools and click IGMP. The page shown in the

Choose ADVANCED > Network Tools and click Quality of Service. The page

following figure appears. When enable IGMP Snooping, the multicast data transmits through t he specific LAN port which has received the request r epor t .

4.4.11.3 Quality of Service

shown in the following figure appear s . In this page, you can enable/disable the QoS. Click Save/Apply to take the setting effect.

DSL-2750B User Manual 64

4.4.11.4 Queue Config

Choose ADVANCED > Network Tools and click Queue Config. The page

Click Add. The page shown in the following f ig ur e appears.

shown in the following figure appears.

Click Save/Apply to save the settings.

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4.4.11.5 QoS Classification

Choose ADVANCED > Ne twork Tools, and click QoS Classification, the page

shown in the following figure appears.This page allows you to config various classification.

DSL-2750B User Manual 66

Click Add. The page shown in the following f ig ur e appears.

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4.4.11.6 UPnP

Choose ADVANCED > Network Tools and click UPnP. The page shown in the

Choose ADVANCED > Network Tools and click ADSL Settings. The page

the modulation mode with

following figure appears. In this page , you can configure universal plug and play (UPnP). The system acts as a daemon after you enable UPnP. UPnP is used for popular audio visual software. It allows automatic 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 Inter net requests. Click Apply to save the settings.

4.4.11.7 ADSL

shown in the following figure appears. In this page, you can select the DSL modulation. Normally, you can keep the factory default setting. The device negotiates DSLAM. Click Apply to save the settings.

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4.4.11.8 SNMP

Choose ADVANCED > Net work Tools and click SNMP. The page shown in the

right figure appears. I n t his page, you can set SNMP parameters.

 Read Community: The network administrator must use this password to

read the information of thi s device.

 Set Community: The network administrator must use this password to

configure the information of this device.

 Trap Manager IP: The tra p information is sent to this host.

Click Apply to save the settings.

DSL-2750B User Manual 69

4.4.11.9 TR-069

Choose ADVANCED > Network Tools and click TR-069. The page shown in

Configuration Server

Choose ADVANCED > Network Tools and click Certificates. The Certificates

the following figure appears. In this page, you can configur e t he TR-069 CPE. WAN Management Protocol (TR-069) allows a Auto(ACS) to perform auto-configuration, provision, collection, and diagnostics to this device. In this page, you may configure the parameters such as the ACS URL, ACS password, and conne ction request user name. After finishing setti ng, click Apply to save and apply the settings.

4.4.11.10 Certificates

page shown in the following figure appears. In this page, you can c onfigure local certificate and trusted certificate.

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4.4.12 Routing

Choose ADVANCED > Routing. The page shown in the following page

Choose ADVANCED > Routing and click St atic Route. The page shown in the

appears.

4.4.12.1 Static Route

following figure appears. This page is used to configure the routing information. In this page, you can add or delete IP routes.

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Click Add to add a static route. The page shown in the following figure appears.

 Destinatio n Network Address: The destination IP address of the router.

Choose ADVANCED > Routing and click Default Gatewa y. The page shown

 Subnet Mask: The subnet mask of the destination I P address.  Use Gateway IP Address: The gateway IP address of the router.  Use Interface: The interface name of the router out put por t .

You can click Use Gateway I P Address or Use Interface. Click Apply to save the settings.

4.4.12.2 Default Gateway

in the following figure appears. Select the WAN interface as your default gateway. Click Apply to save the settings.

DSL-2750B User Manual 72

4.4.12.3 Policy Routing

Choose ADVANCED > Routing and click policy Routing. The page shown in

Click Add, the page shown in the following figure appears.

the following figure appears. The policy route binds one WAN connection and on e LAN interface.

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4.4.13 RIP

Choose ADVANCED > Routing and click RIP. The page shown in the following

Network address translation (NAT) is the process of modifying network address

following figure

figure appears. This page is used to select the interfaces on your device that use RIP and the versio n of the protocol used. If you are using this dev ice as a RIP-enabled device to communicat e with othe rs using the routing information protocol, enable R IP and click Apply to save the settings.

4.4.14 MultiNat

information in IP packet headers while in transit across a traffic routing device for the purpose of remapping a given address space into another. The packets which source IP address match between “internalStart” and “internalEnd” in the NA T table come to the router , the router changes source IP of this packet by the IP address that set between “externalStart” and “externalEn d”, then transmit the packet into Internet. Choose ADVANCED > MultiNat. The page shown in the appears.

DSL-2750B User Manual 74

Click Add, the page shown in the following figure ap pear s.

In this page, please select the proper ty pe; select the proper Use i nterfac e, and

Choose ADVANCED > Schedules. The page shown in the following figure

configure the other par ameters in this page. After finishing setti ng, cl ick Apply to save the settings.

4.4.15 Schedules

appears.

DSL-2750B User Manual 75

Click Add to add schedule rule. The p age shown in the following figure appears.

Click Apply to save the settings.

Choose ADVANCED > Logout. The page shown in the following figure

4.4.16 Logout

appears. In this page, you can log out of the configuration page.

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4.5 Maintenance

Choose MAINTENANCE > System. The System page shown in the

local hard drive.

4.5.1 System

following figure appears. In this page, you can reboot device, back up the current settings to a file, restore the settings from the file saved previously, and res tore the factory default settings. The buttons in this page are described as follows:

 Reboot: Reboot t he device.  Backup Settings: Save the settings to the

Select a location on your computer to back up the file. You can name the configuration fil e.

 Update settings: Click Browse to select the configuration file of

device and click Update Settings to begin restoring the device configuration..

 Restore Default Settings: Reset the device to default settings.

Notice: Do not turn off your device or pres s t he Reset button while an operation in this page is in progress.

DSL-2750B User Manual 77

4.5.2 Firmware Update

Choose MAINTENANCE > Firmware Update. The page show n i n the following

hile this

Choose MAINTENANCE > Access Controls. The Access Controls page

figure appears. In this page, you can upgrade the firmware of the device. The procedure for updat in g the firmware is as follows:

Step 1 Click Browse…to search the file. Step 2 Click Up date Firmware to update the configuration file.

The device loads the file and reboots automatically.

Notice: Do not turn off your device or press the reset button w procedure is in progress.

4.5.3 Access Controls

shown in the following figure appears. The page contains Account Password, Services.

DSL-2750B User Manual 78

4.5.3.1 Account Password

In the Access Controls page, click Account Password. T he page shown in

the following figure appears. In this page, you can change the password of the user and set time for auto matic logout. You should change the default password to secure your network. Ensure that you remember the new password or write it down and keep it in a safe and separate location for future reference. If you forget the password, you need to reset the device to the factory default settings and all configuration settings of the device are lost. Select the Username from the drop-down list. You can select admin, support, or user. Enter the current and new passwords and confirm the new password, to change the password. Click Apply to apply the settings.

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4.5.3.2 Services

In the Access Controls page, click Services. The page shown in the following

figure appears. In this page, you can enable or disa ble the serv ices that ar e used by the remote host. For example, if telnet service is enabled and port is 23, the remote host can access the device by telnet through p ort 23. Normally, you need not change the settings. Select the management services that you want to enable or disable on the LAN or WAN interfa ce. Click Apply to apply the settings.

Note:

If you disable HTTP service, you cannot access the configuration page of the device any more.

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4.5.4 Diagnostics

Choose MAINTENANCE > Diagnostic. The page shown in the following figure

appears. In this page, you can test the device. This page is used to test the connection to your local network, and the connection to your DSL service provider. Click Rerun Diagnostics Test to run diagnostics.

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4.5.5 System Log

Choose MAINTENANCE > System Log. The System Log page sho wn in the

In this page, you can enable or disable the

Choose MAINTENANCE > Logout. The page shown in the following figure

following figure appears. This page displays event log data in the chronological manner. You can read the event log from the local host or send it to a system log server. Available event severity levels are as follows: Emergency, Alert, Critical, Error, Warning, Notice, Informational and Debugging. system log function. The procedure for logging the events is as follows:

Step 1 Select Enable Log check box. Step 2 Select the display mode from the Mode drop-down list. Step 3 Enter the Server IP Address and Server UDP Port if the Mode is set

to Both or Remote. Step 4 Click Apply to apply the settings. Step 5 Click View System Log to view the detail information of system log.

4.5.6 Logout

appears. In this page, you can log out of the configuration page.

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4.6 Status

Choose STATUS > Device Info. The page shown in the following figure

and local network

You can view the system informat ion and monitor performance.

4.6.1 Device Info

appears. The page displays the summary of the device status, including the system information, Internet information, wireless information information.

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4.6.2 Wireless Clients

Choose STATUS > Wireless Clients. The page shown in the following figure

Choose STATUS > DHCP Clients. The page shown in the following page

appears. The page displays authenticated wireless stations and their st at uses.

4.6.3 DHCP Clients

appears. This page displays all client devices that obtain IP addresses from the device. You can view the host name, IP address, MAC address and time expired(s).

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4.6.4 Logs

Choose STATUS > Logs. The p age shown in the following figure appears.

This page lists the system log. Click Refresh to refresh the sy stem log show n in the table.

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4.6.5 Statistics

Choose STATUS > Statistics. The page shown in the following figure appears.

. This

This page displays the statistics of the network and data transfer information helps techni cians t o ident ify if the device is functioning properly. The information does not affect the function of the device.

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4.6.6 Route info

Choose STATUS > Route Info. The pa ge show n in the f ollowing figure appears.

Choose STATUS > Logout. The page shown in the following figure appears. In

The table shows a l ist o f destinat ion r outes co mmon ly accessed by the net work.

4.6.7 Logout

this page, you can log out of the configuration page.

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5 FAQs

Question

Answer

Check whether the power switch is turned on.

Check the following:

– If the device conne c t s t o a hub or a switch, use the straight-through cable.

Why is the DSL indicator not on?

Check the connection betw een the DSL interface of the device and the socket.

Why does the Internet access fail when the DSL indicator is on?

Ensure that the following inform at ion is entered correctly:

User name and password

Choose start > Run fro m the des ktop. Enter Ping 192.168.1.1 (the default IP address of the dev ice) in th e DOS

The TCP/IP properties of the network card of the computer

Keep the device powered on and press the RESET button for 1 second. Then, the device automatically reboots

 User name and password of common account: admin/admin

Why are all the indicators off?

Why is the LAN indicator not on?

Why does the web configuration p age of the device fail to be access ed?

How to restore the default c onf ig ur ation after incorrect configurat ion?

 Check the connection between the pow er adapter and the power socket.



 The connection between the device and the PC, the hub, or the switch.  The running status of the computer, hub, or switch.  The cables that connects the dev ice and other devices:

– If the device conne c t s t o a c omputer, use the cross over cable.



window. If the web configuration page still cannot be accessed, check the following configuration:

 The type of the network cable  The connection between the device and the computer



and is restored to the factor y default configuration. The default configuration of t he device is as follows:

 IP address: 192.168.1.1  Subnet mask: 255.255.255.0.  User name and password of su per account: admin/admin

DSL-2750B User Manual 88

FCC Statement

This equipment has been t ested and found to comply with the lim its for a Class B digital device, pursuant to part 15 of the F CC Rules. These limits are designed to provide reasonable protection against harm ful interferenc e in a resident ial installation. This equipm ent generates, uses and can radiate radi o frequenc y energy and, if not installed a nd used in accordance with the instructions, m ay cause h armf ul interference t o radio c ommunications . However, there is no guarant ee that interference will not oc cur in a particu lar installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: —Reorient or relocate the receiving antenna. —Increase the separation between the equipment and receiver. —Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. —Consult the dealer or an experienced radio/TV technician for help.

FCC Radiation Exposure Statement

This device complies with F C C radia tio n exposure limits set f orth f or an unc ontroll ed en viro nment and it also complies with Part 1 5 of the FCC RF Rules. This equi pment must be installed and operated in ac cordance with provid ed instructions and t he antenna(s) used for this transmitter m ust be installed to provide a separat ion distance of at least 20 cm from all persons and m us t not be co-located or operating in conj uncti on with an y other antenn a or transm itte r. End-users and install ers must be provided with antenna install ati on instructions and consider removing the no-collocation statement.

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 interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Caution!

Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

DSL-2750B User Manual 89