What high voltage telephone equipment? Telephone hardware is low voltages just like networking voltages. Why would ethernet transceivers be in hardware? Low voltages.
We are now discussing people who invent lies - to sound honest. Ethernet transceivers are required to be some of the most robust. Will withstand 2000 volt transients without damage. Some are even more robust.
We engineers constantly deal with IT people. Who know as much about computer hardware as a taxi cab driver knows about V-8 engines.
How many computers have you designed? Not assembled. Designed by first drawing schematics. My first design was over 45 years ago. Stop trying to claim knowledge. Your examples are disinformation.
Anyone with minimal IT and computer knowledge knows telephones are low voltage. Ethernet ports are among the most robust ports in electronics
Only the most electrically ignorant constantly promote expensive magic boxes. You don't even know that lightning protection is compromised (bypassed) because converter connect to AC mains. But then you are an IT guy. Who has no idea how robust hardware really is.
Has no idea that direct lightning strikes all over the world, over 100 years ago, caused no damage to low voltage hardware (ie telephone equipment) when and because earth ground was properly implemented.
Please stop claiming superiority using 'IT' as proof. If informed, then stated is why ALL professionals required low impedance connections to earth ground. So that surges (including direct lightning strikes) cause no damage. Cited professional sources. What have you posted? Technical lies justified only by hearsay and tweets.
IT people, so often, have no idea how a computer or electricity works. A perfect example of ignorance is "high voltage telephone equipment." The lie suggests knowledge only as a salesmen or accountant for Nokia.
For each room, cut paper into shaped for various furniture. For example, cut out a bed, dresser, and nightstand for bedrooms. With various configurations, it will then become obvious where cable and network ports are best located.
For example, doing so will make obvious where furniture cannot be so that doors can swing and window access exists.
Also install some plastic pipes, for example, between basement and attic. So that future low voltage wires are easily installed for features we do not yet know we need.
Dedicate a location for all communication, network, and security hardware. With enough AC plugs to power those devices. Bringing all wires to a common point (with a large plywood sheet on that wall for mounting) makes upgrades and debugging much simpler.
AC wired in a manner so that a future generator or power wall can power only items that must always have power.
All incoming TV, network, etc wires must enter a structure at one service entrance. So that all share same earth ground electrodes with AC electric.
Ufer grounds (using rebar) should be installed when footing are poured. Essential for all low voltage cabling.