Thanks, that's worth a try. I've read this is usually due to upstream problems, so I watched my network activity for a while last night, but no programs were uploading anything. I also realized that my Obi device has been on half duplex/10 mb/s mode. I switched it to full duplex/100 mb/s. When I was on the phone yesterday, the other person said it sounded better. Not sure if this is just a coincidence. I did notice that the call was more natural sounding. In the past, it was almost like a 2-way radio and very easy to "step on" the other person while they were talking. Now, it seems like we can both speak at once.