Topic Last Modified: 2011-04-07

Issue   During a Microsoft Lync 2010 meeting or call, either no one can hear you because your microphone is not working, or you cannot hear others because your speaker is not working.

Resolution   Make sure the audio device is plugged in correctly, and also check the volume settings on the device. If there is physical damage to the device or if the problem persists after restarting your computer, try using a different device. Additionally, make sure the device is optimized for Lync 2010. For a list of optimized devices, see “Phones and Devices Qualified for Microsoft Lync” at

Before making or receiving another call, check that the microphone or speaker is working. Then, check the audio quality by making a test call. To make a test call, do the following:

  1. In the lower-left corner of the Lync main window, click the audio device menu.

  2. Click Check Call Quality, and then listen to how you sound when using the selected device.

We recommend that you enable call forwarding or simultaneous ring so that incoming calls get routed to another phone and are not missed. For the steps about how to set up call forwarding and simultaneous ring, see “Call forward and simultaneous ring” at

If the problem persists, transfer the call to a landline by doing the following:

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