When you work with a professional audio production company, that uses legally licensed music and professional voice over talent and has experience editing audio for telephony applications, the sound quality is going to be much better than something put together by an amateur or something you've recorded and thrown together yourself. Professional audio production is very cost-effective, and you'll get a big bang for your buck by going professional.
A well written script is the cornerstone of any great on hold message. It must capture the caller’s attention, so they remain engaged while navigating menu options or waiting on hold. The script that callers hear can set the tone for the rest of the conversation. It should also be in line with your goals, which can be broken down to 3 main objectives. It can be to inform the caller, promote the brand or product, or just entertain the caller. Most of all, it has to be engaging.

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.
As you begin your search for an on hold messages service provider, you’ll find many companies advertising that they can do the job for you. But, you don’t want just any company, nor do you want the same ho-hum, boring hold-music heard at most businesses, because boring is something your business can’t afford to be. You want a provider that adds real value to your bottom line, you want an on hold company that’s responsive to your needs, has a proven track record, and finally, you want a provider that makes the process easy, so you don’t have to!