Do you have choppy sound internally? If you do then there is something wrong with your network - not enough bandwidth, cheap switches, etc. If your equipment will do it, turn on QOS (Quality of Service). That should help internally. If it's from the 3102, then it's the 3102 giving problems. I have not used that one myself but others have gotten it to work with little to no issues. AudioCodes and Patton gateways are getting much better reviews for sound quality and reliability. If you're getting choppy sound from a VoIP providor give them a call. Mine has helped quite a bit to resolve issues or at least traced them down to uncontrollable outside sources.