Hi, Here's the problem I'm "hearing": Test Case #1 x1001 calls x1002 - Audio is rock solid Test Case #2 x1001 calls x3001 (Conference Bridge) x1002 calls x3001 (Conference Bridge) - Audio is mostly perfect. However, occasional "glitches" in the audio can be heard Notes: - Bypass media is switched off. FreeSWITCH routes audio for both the bridged, and the conferenced call - rtp-autoflush-during-bridge is "true" on Sofia profile internal.xml - I enabled the debug trace for auto-flush in switch_rtp.c (line 1895) and see occasional auto flush of rtp packets for *both* test cases. The glitches don't coincide with the flushing. In fact with flushing you can't hear when data gets flushed (2x20ms packets). Environment - CentOS 5.4 - Tested on AWS EC2 Small, Medium, Large instances. On Medium and Large CPU affinity for FreeSWITCH set to the 2nd core. Questions: - What's different between bridging a call and a conference call run through mod_conference in terms of audio processing? - Thoughts on how to debug this? Thanks, Chris.