Dell D420 specifications Mobile Broadband or Wireless Wide Area Network Wwan

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2.Under Pick a Help topic, click Dell User and System Guides.

3.Under Device Guides, select the documentation for your wireless network card.

Completing the Connection to the WLAN

When you turn on your computer and a network (for which your computer is not configured) is detected in the area, a pop-up appears near the wireless signal icon in the lower-right corner of the Windows desktop.

Follow the instructions provided in any utility prompts that appear on your screen.

Once you have configured your computer for the wireless network that you selected, another pop-up notifies you that your computer is connected to that network.

Thereafter, whenever you log on to your computer within the range of the wireless network that you selected, the same pop-up notifies you of the wireless network connection.

NOTE: If you select a secure network, you must enter a WEP or WPA key when prompted. Network security settings are unique to your network. Dell cannot provide this information.

NOTE: Your computer can take up to 1 minute to connect to the network.

Enabling/Disabling the Wireless Network Card

NOTE: If you are unable to connect to a wireless network, ensure that you have all the components for establishing a WLAN (see What You Need to Establish a WLAN Connection).

You can turn your computer's wireless networking function on and off by using the WiFi Locator - Wireless On/Off switch. If the wireless networking function is turned on, use the WiFi Locator - Wireless On/Off switch to disable it. If the wireless networking function is turned off, use the WiFi Locator - Wireless On/Off switch to enable it.

Monitoring the Status of Wireless Network Connections Through Dell™ QuickSet

The wireless activity indicator provides an easy way to monitor the status of your computer's wireless devices. Right-click the Dell QuickSet icon in your taskbar, and then select or deselect Wireless Activity Indicator Off to turn the wireless activity indicator on or off.

The wireless activity indicator indicates whether your computer's wireless devices are enabled or disabled. When you turn the wireless networking function on or off, the wireless activity indicator changes to display the status.

For more information about the wireless activity indicator, see the Dell QuickSet Help file. For information about QuickSet and how to access the Dell QuickSet Help file, see Dell™ QuickSet.

Mobile Broadband or Wireless Wide Area Network (WWAN)

Much like a WLAN, a Mobile Broadband network (also known as a WWAN) is a series of interconnected computers that communicate with each other through wireless technology. However, a Mobile Broadband network uses cellular technology and therefore provides Internet access in the same varied locations from which cellular telephone service is available. Your computer can maintain the Mobile Broadband network connection regardless of its physical location, as long as the computer remains in the service area of your cellular service provider.

What You Need to Establish a Mobile Broadband Network Connection

NOTE: Your computer supports use of a 34-mm ExpressCard in an adapter to provide Mobile Broadband (WWAN) connectivity. Your computer does not support use of a WWAN Mini-Card.

To set up a Mobile Broadband network connection, you need:

A Mobile Broadband ExpressCard

For instructions on using ExpressCards, see Installing a PC Card or 34-mm ExpressCard.

The Dell Mobile Broadband Card Utility (already installed on your computer if you purchased the card when you purchased your computer, or on the CD that accompanied your card if purchased separately from your computer)

If the utility is corrupted or deleted from your computer, see the Dell Mobile Broadband Card Utility user's guide for instructions. The user's guide is available through the Windows Help and Support Center (or on the CD that accompanied your card if you purchased it separately from your computer). To access the Help and Support Center, see Windows Help and Support Center.

Connecting to a Mobile Broadband Network

NOTE: These instructions apply only to Mobile Broadband ExpressCards or Mini-Cards. They do not apply to internal cards with Bluetooth® wireless technology or WLAN Mini-Cards.

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Contents Abbreviations and Acronyms Dell Latitude D420 Users GuideFront View About Your ComputerDevice status lights Keyboard and network status lights Fingerprint reader optionalLeft View Audio connectorsRight View Modem connector RJ-11 USB connectorsNetwork connector RJ-45 Video connectorBottom View Back to Contents Appendix Cleaning Your ComputerFCC Notice U.S. Only Macrovision Product NoticeFCC Class B Battery Performance Using a BatteryChecking the Battery Charge Dell QuickSet Battery MeterPower Management Modes Conserving Battery PowerLow-Battery Warning Standby ModeCharging the Battery Configuring Power Management SettingsReplacing the Battery Hibernate ModeStoring a Battery Installing a PC Card or 34-mm ExpressCard Using CardsCard Types Card BlanksInstalling a PC Card Installing a Smart Card or Secure Digital SD CardInstalling a 34-mm Express Card Removing a PC Card, 34-mm Express Card, or Blank Back to Contents Adjusting Brightness Using the DisplaySwitching the Video Image Setting Display Resolution and Refresh RateSwapping Primary and Secondary Displays What Are You Looking For? Find It Here Finding InformationGuides Service Tag and Microsoft Windows LicenseDell Support Website support.dell.com Select Drivers & Downloads and click GoOperating System CD Glossary Docking device See APR Device driver See driverPage Page NIC See network adapter Page System tray See notification area Video resolution See resolutionBack to Contents Getting Help Online ServicesObtaining Assistance Ftp.dell.comAutoTech Service Problems With Your OrderAutomated Order-Status Service Support ServiceBefore You Call Diagnostics ChecklistContacting Dell Antigua and BarbudaAustralia Sydney Aruba0011 Website support.euro.dell.comColombia China XiamenCosta Rica Czech Republic PragueCorporate France Paris MontpellierGermany Langen GreeceItaly Milan GeneralJamaica Website support.jp.dell.comWebsite support.ap.dell.com Malaysia Penang MacaoMexico MontserratSt. Kitts and Nevis Puerto RicoSt. Lucia St. Vincent002 Website support.ap.dell.com TaiwanWebsite support.ap.dell.com Thailand Trinidad/TobagoVenezuela Virgin IslandsNumeric Keypad Using the Keyboard and Touch PadKey Combinations Touch Pad Power ManagementFingerprint Reader optional Speaker FunctionsCustomizing the Touch Pad and Track Stick Changing the Track-Stick CapMouse Properties window Page Physically Connecting to a Network or Broadband Modem Setting Up a NetworkNetwork Setup Wizard Wireless Local Area Network WlanSetting Up a New Wlan Checking Your Wireless Network CardWhat You Need to Establish a Wlan Connection Determining the Wireless Network Device Manager Connecting to a Wireless Local Area NetworkEnabling/Disabling the Wireless Network Card Mobile Broadband or Wireless Wide Area Network WwanConnecting to a Mobile Broadband Network Under Pick a Help topic, click Dell User and System GuidesInternet Connection Firewall Dell Wi-Fi Catcher Network LocatorBefore You Begin Adding and Replacing PartsRecommended Tools Turning Off Your ComputerHard Drive Removing the Hard Drive Dismantling the Hard Drive Hinge Cover Replacing the Hard DriveMemory KeyboardPage Mini-Cards Wireless Local Area Network Wlan CardsMobile Broadband Wwan Cards Page Subscriber Identity Module SIM Card Coin-Cell Battery Internal Card With Bluetooth Wireless TechnologyBack to Contents Dell QuickSet Passwords Using Smart CardsSecuring Your Computer Security Cable LockUsing an Administrator Password Using a Primary/System PasswordUsing a Hard Drive Password Trusted Platform Module TPMUsing the Security Management Software Enabling the TPM FeatureSecurity Management Software Activating the Security Management SoftwareIf Your Computer Is Lost or Stolen Computer Tracking SoftwareViewing the System Setup Screens System Setup ProgramSystem Setup Screens Commonly Used SettingsChanging COM Ports Performing a One-Time BootEnabling the Infrared Sensor Locate Fast IR under Onboard DevicesPage What Is a Driver? Reinstalling SoftwareReinstalling Drivers and Utilities DriversManually Reinstalling Drivers Using the Drivers and Utilities CDSoftware and Hardware Incompatibilities Click Start→ Help and SupportCreating a Restore Point Using Microsoft Windows XP System RestoreUndoing the Last System Restore Restoring Your Operating SystemEnabling System Restore Using the Operating System CDReinstalling Windows XP Before You BeginSpecifications Video CommunicationsAudio DisplayAC Adapter BatteryEnvironmental PhysicalAbbreviations and Acronyms Transferring Information to a New Computer Start the Files and Settings Transfer WizardClick Files and Settings Transfer Wizard Back to Contents Identifying Your Computer Traveling With Your ComputerPacking the Computer Travel TipsBack to Contents Dell Technical Update Service TroubleshootingDell Diagnostics When to Use the Dell DiagnosticsOption Function Dell Diagnostics Main MenuAccessing the Dell Support Utility Drive ProblemsDell Support Utility Clicking the Dell Support IconHard drive problems CD and DVD drive problemsProblems writing to a CD/DVD-RW drive If you hear an unfamiliar scraping or grinding soundError Messages Mail, Modem, and Internet ProblemsVerify that the modem is communicating with Windows Page Click Start→ Control Panel→ Add or Remove Programs Keyboard Problems Ieee 1394 Device ProblemsExternal Keyboard problems Unexpected characters Lockups and Software ProblemsComputer does not start up Computer stops respondingNetwork Problems Memory ProblemsOther software problems Solid blue screen appearsWireless Local Area Network Wlan PC Card or ExpressCard ProblemsMobile Broadband Network Restart the computer and log on to the network againEnsuring Sufficient Power for Your Computer Power ProblemsDocking Power Considerations Scanner Problems Printer ProblemsAC Power Loss While the Computer Is Docked Docking While the Computer Is RunningTouch Pad or Mouse Problems Sound and Speaker ProblemsNo sound from headphones No sound from integrated speakersIf the display is blank Video and Display ProblemsIf the display is difficult to read If only part of the display is readable Adjust the Windows display settingsClick Start→ Control Panel→ Appearance and Themes Connect an external monitor
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