Context-Sensitive Volume Control

In some countries, regulations state that a phone's receiver volume must be reset to a nominal level for each new call.

Transmit levels are fixed according to the TIA/EIA-810-A standard. The next table lists parameters that configure the receiver volume to reset and persist across calls each time a user makes changes to the default volume level. You can adjust the volume of phone sound effects—such as the ringer and the volume of receiving call audio—separately for the speakerphone, handset, and headset.