Music on hold (MOH) refers to the business practice of playing recorded music to fill the silence that would be heard by telephone callers who have been placed on hold. It is especially common in situations involving customer service.
Most MOH systems are integrated into a telephone system designed for businesses via an audio jack on the telephone equipment labeled “MOH”. There are also some units with “analog” capability that allow music on hold for small and home based companies without a phone system.
The source of the music is usually from CDs or digital files such as MP3, but some older systems may still use cassette tapes (sometimes employing endless-loops), or reel-to-reel tape players.
Newer technology allows MP3 files to be downloaded automatically from the internet so that messages (or interesting content in the form of news and weather, amongst many) can be changed daily. The new “Online On Hold” technology makes the older technology redundant since it requires no additional hardware.
