You've asked a few times and I didn't reply since I felt you need to contact your ISP and get the one to one discussion about how the internet works. Throughput is never assured and will affect your application.
You are not alone in this issue.
Best of luck,
I regularly communicate with a friend, using the latest version of MSN Messenger and Creative Webcams. Lately, her voice is breaking up and becomes staccato over my speakers. I have given her a new headset, and it works perfectly on her pc with Sound Recorder in her W98se OS. However, still the same problem with MSGR! I have played around with her hardware acceleration and audio settings, with which I am familiar, but with no success. Neither is it my firewall, as I have tried with it shut down. We both use DSL broadband, (256Kb down, 64Kb up), and my OS is XP SP2. Any ideas on this frustrating glitch, please?