I had a Netgear CM500V modem which I replaced with an Arris SBV3202 to work with upgraded speed to 600 Mbps. Owned modems and router. After installing, everything worked as expected except I had a persistent stuttering dial tone when no voicemail was waiting. I tried leaving myself a new message and deleting it but the stutter would not go away. Advanced Repair at Comcast suggested there was a line problem and would send someone out. Being doubtful of this since it happened when I switched modems, I thought I would wait a few days and consider if I wanted to incur possible charges for this. I decided to reinstall my old modem and see if it experienced this new problem. No, it worked as expected and the voicemail stutter disappeared. Are there any known voicemail conflict issues with this Arris modem? I don’t want to take a chance on replacing with the same model.