76 Chapter 11 Troubleshooting the IP Softphone 2050NN40050-100NN40050-100d Select Hardware.The Hardware dialog tab appears.e Click Device Manager.3 If Universal Serial Bus controllers does not appear in the Device Manager:• Ensure that USB is enabled in your computer setup menu.• Check for a BIOS upgrade.• Contact your computer supplier.4 Verify that USB Audio Device appears under Sound, video and game controllers in theWindows Device Manager. To open the Device Manager, refer to step 2.5 Verify that HID-compliant device and USB Human Interface Device appear under HumanInterface Devices in the Windows Device Manager. To open the Device Manager, refer to step2.6 If none of the devices in steps 4 and 5 appear in the Windows Device Manager (and theconditions in steps 1 and 2 are correct), then consult the USB Troubleshooting section inWindows Help.7 Verify that you have selected USB Audio Device as the microphone and speaker for theSoftphone.USB Headset Adapter features appear dimmedSymptom:In the USB Headset dialog box of the IP Softphone 2050 Settings window, all the features appeardimmed.Description:Either the IP Softphone 2050 does not recognize the adapter as a supported Nortel adapter, or theadapter is earlier than 2.0. Supported adapters include: Enhanced USB Adapter (desktop) andNortel Mobile USB Adapter (mobile).Potential causes:• Your USB Headset Adapter does not support the functions listed on the USB Headset dialogbox.• The USB Headset Adapter has failed to enumerate properly.Action:If you suspect faulty enumeration, do the following:1 Unplug the USB cable from the USB Headset Adapter.2 Wait one minute.
