I am the end user. I have no access to, privileges in, or knowledge of the systems controlling the phones used by my employer, New York State Information Technology Services. I did somehow accidentally turn this feature ON, so it would seem reasonabl...

Of course!  How simple... and just what the Cisco manuals say. What they don't say is how to find that button. Could you explain how to make it appear? I have tried what seems like every option in every menu, I find nothing like it.