This preferred embodiment includes {TAIL ~ a network diagnostic device} that connects to the inter messaging network and requests a test data file to be retrieved from {HEAD ~ the voice mail sub systems} in the inter messaging network 
This preferred embodiment includes { TAIL ~ a network diagnostic device } that connects to the inter messaging network and requests a test data file to be retrieved from { HEAD ~ the voice mail sub systems } in the inter messaging network
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH