Read the forum guidelines
I have a Panoramic router with a Panasonic wireless phone system connected to it. Sometimes, when the phone rings and I answer, I can't hear anyone and they can't hear me. It does it just a couple of times a day but can be frustrating to both parties. I upgrated the router, no help. Switched to different phone manufacturer, no help. Unplugged the printer which is on wifi to see if the printer was trying to use fax line, no help. I've run out of ideas.
Did this just start happening? Do you also have a cable-box connected to the coaxial cable? Could be a splitter going bad as the humility increases.
No, it's been doing it for 6 months of so. This is a wireless phone connected directly to the panoramic router.