To follow on from disturbedone, the setting he is talking about is "Development tracing". It is in the "system" tab in "trace options". Once this is ticked on, go to "Status" and you will see a lot of extra viewing selections. Choose "Voicemail Staus". This is a view only screen, it wont log a file, so you will need to be looking at it when you think the ports are being exceeded.It doesnt keep a record of how many times either.