What we have is when we either make a call, or receive one, we lose sound from the other end periodically. Usually around every minute, lasting 5-10 seconds. Our callers say they can hear us say "are you there", but we simply can't hear them. Just silence. No static or strange sounds.
Doesn't effect the internet, and we don't have dropouts much anymore either. This is just VFX.
Unfortunately, I don't have another router to test. But I have a DLink 502T modem and a Lynksys WRP400 setup.
My cell is poked and obviously the landline is no good. So posted here.