11-21-2018, 03:13 AM
cable/dsl/fiber/T1 and independent power
Copper connections from Telcom have a real uptime requirement and are powered by huge batteries in the switch; the batteries are floated on grid power. I believe the design goal is enough battery to last through a 4-day grid outage.
Remote DSLAMs also have batteries in them, and a connector for portable generator feed.
Telcom fiber isn't subject to the same regulations but is located in the same facility. Mid-span optics are passive, fiber only needs power at each end.
I believe cable is merely grid-powered.
As usual, I didn't notice any outages, I just read about them here.
Copper connections from Telcom have a real uptime requirement and are powered by huge batteries in the switch; the batteries are floated on grid power. I believe the design goal is enough battery to last through a 4-day grid outage.
Remote DSLAMs also have batteries in them, and a connector for portable generator feed.
Telcom fiber isn't subject to the same regulations but is located in the same facility. Mid-span optics are passive, fiber only needs power at each end.
I believe cable is merely grid-powered.
As usual, I didn't notice any outages, I just read about them here.