I'm using the free 3CXPhone softphone. The first few seconds of each call I make starts out garbled, with intermittent gaps in the audio, then it clears up and 99% of the remaining call is very good. I have a very strong broadband connection, the necessary RTP and SIP ports are unblocked with my firewall and I have another softphone from my VOIP provider and all calls are 100% from start to finish with that phone, so I know my hardware and network are not the problem, there is something not working right with the 3CX phone. Mostly I left the settings as default and just entered the RTP range for my VOIP provider, the username and password for my accounts. I have SIP accounts from 2 different providers and exactly the same thing happens regardless of which account I place or receive calls with. The problem is with the 3CX softphone. I would have just stayed with the softphone provided by my first VOIP provider but it is locked and does not allow multiple accounts or to be used with any other provider...so I found and tried the 3CX softphone. Any suggestions of how to get a consistently clear transmission?