ATT Microcell in Austin, TX

Tue Feb 18 19:33:46 UTC 2020

On 2/18/20 2:25 PM, Matt Hoppes wrote:
> Power goes out and the pole mounted nodes go out eventually.

Where "eventually" seems to vary a LOT.  I've observed hold up times as 
long as 8+ hours all the way down to "well, I guess there was a minor 
power glitch at the nearest power injection point because it dropped 
everything for 30 seconds while stuff came back up".  Lots of factors 
seem to play in this both in terms of design and maintenance.  For a 
while, some MSOs took their job seriously as they were offering 
relatively popular business-oriented voice products.  MSOs targeting 
only consumer service and still in the mindset of linear TV (or having 
not touched their plant since that was the major use case) often have no 
battery at all.

The same seems true of many FTTN deployments.  Hold-up time on nodes 
varies a lot.  The older the deployment, the more design hold-up time it 
seems to have, but of course maintenance varies a lot.  Newer 
deployments, especially fiber-to-the-curb often have essentially no 
hold-up at the local node unless it's back powered from the customer 
prem (in which case the customer can keep it up themselves).
-- 
Brandon Martin