OK, I have been in telecom for a while and have never seen anything like this. We had an outside company that we deal with quite frequently. Every time they left a voicemail, the beginning 8 seconds were silence. After getting some captures I had determined is was not an issue with RTP. Packets were being received fine so it was simply silence from the remote end. After some head scratching I thought that maybe the default "beeptone.wav" that is used to signal the start of recording was somehow being interpreted as DTMF by the remote PBX. So, off to the net for a new tone I could swap it out with and wallah everything worked fine! The VM's from this company are now fixed and no longer cuttoff. The bad news is the problem seems to be affecting other company's systems now. I have two users that are now reporting this quite regularly. The new tone we selected is more of a chime sound, so I don't understand why this is happening. It is certainly not being confused with DTMF at this point. Could it truly be the remote end, or could 3CX actually be getting confused by it's own tone?