Testing the headset system and the sound quality
Adjusting the volume
Adjusting the microphone volume of the call transmission
By default, the microphone volume control is set to position 4. This setting is suitable for most telephones.
Make a call to someone who will help you find the correct sensitivity setting for your microphone.
Turn the microphone volume control so that the other party can hear you at a comfortable level.
Adjusting the microphone volume of the USB transmission
Some softphones adjust the microphone sensitivity automatically.
Activate this function in order to be able to optimally use the micro- phone and, via your operating system, adjust the microphone sensiti- vity so that the other party can hear you at a comfortable level (see the Help function of your operating system).
Adjusting the automatic audio transmission “Auto Audio”
With the “Auto Audio” function activated and in the case of a USB connec- tion, the audio signals – e.g. from Windows® Media Player® or iTunes® – are automatically transmitted to the headset.
When you receive a call or when a connection to Skype™ is established, the audio transmission stops and you hear for example the ring tone. The “Auto Audio” function is activated by default.
Activating the “Auto Audio” function
Use a pointed object to press the Set button for approx. 5 seconds. The Link LED 
rapidly flashes blue several times.
Deactivating the “Auto Audio” function
Use a pointed object to press the Set button for approx. 5 seconds. The Link LED 
rapidly flashes red several times.
5s
SD Series – Setup Guide 17