We are trying to figure out why our system is performing slowly lately. We have done the basic maintenance and make sure all mailboxes have little or no messages. We also turned off the notify MsgLampOn & Off for phantom mailboxes. Could this be a hard drive issue?

Problem: almost all of our staff report having a long delay when they access their voicemail. For example, I enter my vm mailbox, takes forever to say "you have 1 new message.." then I hit 1 to listen to message and that takes at least 20 seconds before hearing the message, sometimes a lot longer. At the time of the example, there was only 3 of the 12 voice ports being used.

Any ideas would be greatly appreciated!
Thanks