Sign in with Microsoft
Sign in or create an account.


Assume that you develop a Microsoft Unified Communications Managed (UCMA) API 3.0 Runtime-based application that is integrated with a Lync Server 2010 environment. The application sends tones by using the ToneController.Send method (tone, volume). In this situation, the volume parameter value is unexpectedly inverted to "100%-volume".

For example, if the volume parameter value is set to 70%, the ToneController API will invert the value to 30%.

Additionally, if the values of the tones for the volume are too low, PSTN gateway may reject the tones.


To resolve this issue, install the following cumulative update:

2847888 Description of the cumulative update for Lync Server 2010, Unified Communications Managed API 3.0 Runtime: July 2013

More Information

For more information about the ToneController.Send method, go to the following Microsoft website:

General information about the ToneController.Send method

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!