The chances of a surge through an ethernet cable that will damage the modem is very slim.
Power surge through ethernet cable.
Lighting can hit your device and travel through ethernet but no surge protector will protect that.
Belkin 12 outlet advanced power strip surge protector 8ft cord and ethernet cable satellite telephone and coaxial protection 4000 joules white 4 7 out of 5 stars 987 39 39 39.
Last summer i had a lightning strike on the tv cable stanchion in my back yard.
Powerful surges that the device protects against include direct lightning strikes voltage spikes or poe overvoltages.
There is just not a lot of electricity going through.
It will weld it together so fast.
Interestingly enough the cable modem wasn t damaged but everything else was.
This allows a single cable to provide both data connection and electric power to devices such as wireless access points waps internet protocol ip cameras and voice over internet protocol voip phones.
A power surge can go through any wire.
Yep happens all the time.
The second unit plugs into another electrical outlet near the device you want.
Power over ethernet or poe describes any of several standards or ad hoc systems that pass electric power along with data on twisted pair ethernet cabling.
So the surge must have come in via the coax line went through the cable modem and into the airport extreme out the ethernet line through the thunderbolt to ethernet adapter and into the lacie d2.
So if your routers and switched are connected to surge protectors ethernet by it self is a long shot.
The ethernet ports protect from out of norm surges from the outlet grid.