Allows others to hear your audio while on the phone on some Samsung and new Sony Ericsson phones. Besides that, its a music player that goes full screen on landscape mode and has a funny sound board. I made a toggle button that hangs so you can use it for hold music during a …
Messages on Hold – continuous loop of music and messaging that plays as callers wait to speak to a business representative. Messages On Hold present a mix of marketing messages and customer service information that is mixed with music to play in a loop for callers waiting on hold.

Depending on which ESI phone you have, use the appr opriate diagram (below) to connect it. Each diagram represents the panel on the phone’s underside. Note: The “Top of phone” and “Bottom of phone” references in these diagrams show the correct vertical orientation of the phone — i.e., the part with the display is the top.
And the best part is that you don’t need to write your on hold message script to be so formal. The point of an on hold message is to keep them on the line, not to bore them to death! So, you might as well try to have some fun with it and make your customers laugh while they wait.