Music on hold may be utilised for a variety of phone tasks. It can be played when the caller is on hold or while their call is transferred to another internal participant. When callers are on hold and queuing, or while waiting to be connected to another participant, call centres commonly play music. Some systems allow you to listen to music on hold instead of a ringtone. When a call is placed here, instead of the standard ring tone, music is played until a successful connection is achieved.