The Telephony plugin to Wireshark is pretty neat, but moreso for diagnosis than monitoring. Is there -- this would probably be a PCAP client app -- something that just monitors a port for SIP/STP flows, and shows a call progress thermometer, with a flow number, destination or source DN, direction, and some color coding to show you that the call is proceeding as expected or is anomalous? Basically, something that launches a small state machine for each new flow it seems, and displays the status of the state machine as a row in a table? Clearly, this would get out of hand for hundreds or thousands of calls, but dozens is a pretty big market... Cheers, -- jra -- Jay R. Ashworth Baylink jra at baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274