SmokePing

Smoke Ping SampleSmokePing keeps track of your network latency:
  • Best of breed latency visualization.
  • Interactive graph explorer.
  • Wide range of latency measurement plugins.
  • Master/Slave System for distributed measurement.
  • Highly configurable alerting system.
  • Live Latency Charts with the most ‘interesting’ graphs.
  • Free and OpenSource Software written in Perl written by Tobi Oetiker, the creator of MRTG and RRDtool

It has been a great resource I’ve been using for years. It is very helpful in troubleshooting VoIP issues, as well as general WAN latency. For more information on this tool, go to http://oss.oetiker.ch/smokeping/ and you can also find a free copy to use on www.dslreports.com

Enjoy