We recently expanded our operations...occasionaly when we dial into audix to retreive voicemails the extension just rings. Also sometime extensions will not forward to voicemail and continue to ring. I believe we are maxed out on ports....is there a way that i can see usage? What do you suggest i do to determine whats going on. I though maybe the card had low voltage and wasnt "hearing" the rings....avaya has replaced the card and we are having the same problem.