At the suggestion of the Ring Service Advisor, I installed a cable modem with a Broadcom processor. I purchased a Motorola MB7420 Cable Modem and installed it this morning. No noticeable improvement on audio quality even though the internet connection was excellent.
115 Mbps Download, 11 Mbps Upload
0% Packet Loss (target <1%)
34 ms Ping (target <150 ms)
1.7 ms Jitter (target <30 ms)
I will make contact with the service advisor and see what the next troubleshooting step will be.