[sudo-discuss] voip phone calls

[Jake]

weird.. the voip phone in sudoroom rang, and i answered it (it looked like 
it was coming from the payphone)

but then someone was pressing touch tones, and then a click.. and now 
there's music on the line.  I have no idea how that is possible.

and the other day, i am told that the payphone started ringing out of the 
blue.. no explanation for that.

is someone hacking our voip and playing around?