I'll add the wave phones only vibrate, they will not ring audibly.

This can, and does result in missed communications.
The display does indicate those missed calls/text.
We just often visually check the wave phone display for missed comms.
This became the norm for us. We would call/text on one of the other wave phones and accept/know it would/could be 30 minutes for a call/text back as no one could reasonably feel the vibration generally.
Once we realized this limitation/reality, life became more calm aboard.
Also, if someone calls a wave phone attached to a cabin #, and no one answers, as who could generally as it vibrates, this call will ring however many times, then default and ring within the cabin. This could/is be a huge annoyance for those who nap or what not within said cabin.
I thought I read about a way to solve this.

Don't recall.
Years ago pax reported they couldn't even unplug the phone, to disable ( safety).
Good luck figuring out the phone system and the bedside Ipod clock, even with instructions. lol.
Enjoy