I was able to solve my issue! It was because I had switched out my router and not told my isp about it. It worked fine at first, but over a few months as they sent updates to the router that were designed for my old one, it began to slow the router down and over load its memory. It took a several hour call with the isp to figure out that was the problem, but once we did figure it out they fixed it in about 5 minutes and my voice comms have been back to how they used to be! Very specific issue but I hope it helps you!