So what can we do to avoid inflicting further musical misery on our own customers while they’re patiently sitting on hold? We could just go back to playing a ringing sound, or an intermittent beep just to let people know they’re still connected, but that would be awfully dull. The best compromise is relatively simple electronic music that doesn't have too much going on as the ideal choice for hold music as it requires far less refined sound quality to get a decent rendition down a telephone connection.
A PBX or Key system is a telephone system that brings wires from all phone extensions in the building to one central control box. Some popular PBX or Key phone brands include NEC, Avaya, Mitel, Toshiba and Nortel (Norstar Meridian). If you have a business telephone system you only need our on hold media player in order to get on hold messaging.

You can add wired devices like office VoIP phones or landlines too. After you press "Done" you can start using your business phone number right away.
A hold messaging system provides a better calling experience from start to finish as you can also integrate VoIP Phone Solutions into your system. This routes calls to off-site locations and expands your ability to answer calls in a timely fashion and communicate with customers even if you are out of the store or office.