You can use NAI's Sniffer or ethereal for the same . SNiffer is very good tool for Network Monitoring . Ir will show you the TOP 10 users in real time and you can put trigger's etc to trigger capture when traffic increases beyond a particular limit f...

You will have to use port forwarding i.e if you telnet to < port eg 5001> . Then the router will forward your request to the server .

I think it will also be helpful if you enable PIM SPARSE mode instead of PIM dense unless you have already done so .

hi , 1. Check if your Internet link is choking or not ? 2. check for viruses on lan ?

what is the error message ? also please send the output of debug isdn q931 too .