Audix is quite simply voice mail. Many companies use it. It is a common way to refer to the voice mail system within many companies, regardless of what brand the company may be using.
"Like many great technological innovations of uncertain origin, Audix owes its parentage to Bell Labs. Inspired by the early popularity of telephone- answering machines for the home, Bell Labs technicians wanted to build a similar system for corporate phone networks -- one that didn't involve the use of annoying plastic minitapes. After engineers found a way to store the phone messages digitally, AT&T introduced the first system in 1984, dubbing it "Audix," or Audio Information Exchange."
I was unable to reach Jane Doe, regarding the replacement printer, but I left her an audix.