How to play an announcement after a number of rings?

Q. Can you tell me the easiest way to have messages, periodically after a set amount of rings?

A. For that you'll need a call queue - you can then choose a sound file to play periodically at set intervals. While they are waiting, callers can either hear music or ringing, whichever you prefer. If you decide to play music on hold, you may use the default system music or upload your own.