VPTEST - P2P VoIP performance testing
VPTEST measures how suitable an Internet connection is for Internet telephony (VoIP)
VPTEST tests connection characteristics such as delay, packet loss and jitter, and calculates a MOS value (MOS = Mean Opinion Score) that tells the user what kind of call quality a phonecall would have, if made over the same Internet connection.
Go to the screenshot section to see VPTEST in action.