Thought i would throw this out there about a call i got from client who was trying to change greeting while main phone answering person was on vacation. He changed 7821 voice prompt but entered a *[star]in front of it and received message that call answering is turned off, now all calls get message that business is closed, and i was trying to check all codes on ip office thinking that t was a simple fix. Could not find anything so im thinking about doing a restore and fixing any changes made to system from that restore point..
Turns out that *7821 is a Comcast code to change answering on all lines, go figure that 2 codes would be almost identical
.I checked Comcast codes after posting this *78 is a do not disturb code

Does Comcast always include voicemail on their lines? I could see how that would help their pitch, but it obviously presents a conflict if you already have your own answering device. I assume you had the customer remove that service?

Sorry for delay in answering, yes had this removed in comcast feature code.