Volume Music on Hold
If you find the need to adjust volume of music on hold (MOH) you should edit your music on hold audio files using a product such as Audacity as the PBX does not have a way to control the volume.
http://audacity.sourceforge.net/
When you edit the file reduce the amplitude of the file and then save it. Once saved it can be re-uploaded to the PBX.
Here is a ZIP file with some MOH files at their initial volume, and a decrease level. The files with the db listed are the lower volume.
Some of our dealers have asked for a school bell audio file, see below: