All of a sudden I (and my colleagues) have lost voice. We try everything we can think of.

[ArthurConan Doyle]

Voice may come back for a while for some of us, but goes away again. We try different regions. We do not see dots above our (or other avatar's) heads. They see dots, but we do not. We may get voice back the next day, only to have it suddenly disappear. We have tried different viewers. No luck.

[Rolig Loon]

Viewers play a minor part in voice functionality. The bulk of voice support is given by the external application called SLVoice, which is made by the SL voice provider, Vivox. Voice failures are almost always due to one of the following reasons:

• Your ISP is throttling or blocking the voice service;
• failure of the Vivox service;
• voice issues on the region you are on;
• voice being throttled by bandwidth set incorrectly - please check it by following the instructions here;
• voice hardware (mic, headset) not configured correctly in your operating system settings;
• voice hardware not configured correctly in the viewer;
• another application has your voice hardware in use (example, Skype);
• your anti virus software has “mangled” the voice application; see here.

You can test voice by going to Voice Echo Canyon. If voice is working correctly for you, anything you say there will be echoed back to you.