Just FYI and a big thanks to Anthm and his team I have just completed a mid duration test run with FreeSwitch. Using sipp and a single core Xeon 3.06ghz machine with 1 Gig of ram, FreeSwitch ran for 27 hours under a call load of 60calls per second, with each call lasting 5 seconds each. Calls were ran in ³no media mode² passing the calls to a second FreeSwitch box on identical hardware which Answered the Calls and played back media until sipp acting as a UAC terminated the call. Total Calls Competed: 6,008,187 Total FreeSwitch Session on the relay box: 12,019,199 Average Concurrent Calls: 327 Total Time Ran 27hours My intent was to leave the test running for 48 hours and try to reach the 10million calls mark, however, I screwed up hit the wrong key (^\) and forced a segfault into sipp pulling an early abort on the test. Currently I am working out a test plan to determine several performance metrics independent of Tony and his team. If anyone has any suggestions on performace metrics and test tools you would like to see here drop me a note and let me know. K