On 1/13/22 01:11, Scott T Anderson via NANOG wrote:
For those individuals with backup battery power for their
modem/router, do they maintain Internet access throughout a power
outage (as long as their backup power solution works)? I.e., does the
rest of the ISP network maintain service throughout a power outage?
In 2016, there was a massive storm in my neighborhood that flooded my
fibre provider's GPON PoP. That was an outage.
In 2018, there was a neighborhood-wide power outage that caught the
provider off-guard re: their own backup.
In recent years, the provider has been able to maintain uptime through
extended and/or multiple daily power outages.
But in the end, your provider will be the weakest link, if you are able
to keep your devices powered throughout a lengthy or multi-day outage.
The mobile operators don't seem to be able to last more than 8hrs in my
neck of the woods, and worse if the the day has multiple outages, as the
battery never gets a chance to fully recharge.
Are the modems with backup power designed to operate for a specified
period of time without power and if so, for how long and how was that
duration identified?
All comes down to how large the battery is, and how much the site's
demand is.
If those with backup power do maintain Internet access during a power
outage, do they lose that access if the power outage extends beyond a
certain time? I.e., does the ISP network equipment go offline at some
point in time due to batteries being drained and not having power
generation capabilities?
Again, down to battery and demand sizing.
The other issue here is if there are multiple outages in the same 24hr
period, the ability for the operator to sustain uptime decreases,
because the battery never gets a full charge again.
Mark.
