The word “Ringback” is perhaps unfairly associated with a niche market of cell phone users. A ringback tone is a signaling tone that the caller hears while the phone is ringing. In America, the tradition has been to have a two second tone with a four second pause, mirroring the two second ring and four second pauses on the other end.
If you don’t have the capability in-house, or if you’d prefer to let someone else handle it, this task is easy to outsource.

Someone is late for the conference call, so the music starts. "Well, I've been sitting here all day," the song begins, sort of croony, with a vaguely country affect — the kind of opening that leads you to expect there is, somewhere, an ex-lover who probably isn't coming back. A certain variety of pining. But then, a few bars in, a turn: "Yes I'm waiting on this conference call, all alone. And I'm on hold, yes I'm on hold... I hope it's not all day, ey!"
And if you write something that doesn’t impress your coworkers or earn accolades, that’s fine. It’s called the writing process, and it’s why most writers prefer their seclusion. All writers are embarrassed by their first drafts.