video conferencing unusable due to video and audio freezes
Good morning, experts—
Video conferencing on our home network is effectively unusable. Video and audio freeze several times per minute. Each freeze lasts 3 to 8 seconds. App doesn't matter: Facetime, Zoom and Skype all exhibit this behavior. (Zoom displays the "Internet connection is unstable" message throughout the conference.)
This behavior doesn’t change whether using WiFi or a wired connection to the switch.
Our Xfinity package includes 175Mbps down, 5Mbps up. Speedtest confirms that we're making or exceeding these speeds, though now and then its "speedometer" needle jumps downward from 100+ to ~70 before increasing again in the download test.
Xfinity's Automated Assistant reports that it’s detected a problem with our connection that rebooting the modem should fix. However, I’ve rebooted it several times with no change in this report or the video conference behavior.
I’d welcome any guidance about how to suss this out.