My coworker was trying to change her voicemail greeting, and now:

The message light is flashing.
When she picks up the phone and presses the message button, it just gives her a pulsing beep, like a busy signal.

How can I get it to stop?

Thanks.

What model of Comdial phone system do you have??What model of phones do you have??

Oops. Sorry I forgot to include that. We have a DSU II system with Comdial Impact phones.

Try this: https://www.sundance-communications.com/cgi-bin/ultimatebb.cgi?/ubb/get_topic/f/2/t/000594.html