> On Jan 16, 2018, at 4:19 PM, Grant Taylor via cctalk <cctalk@classiccmp.org>
> wrote:
>
> On 01/16/2018 02:07 PM, Paul Koning via cctalk wrote:
>> Which of course also goes out if the power fails, perhaps not as quickly as
>> a poorly constructed POTS system but it will. Various emergency
>> sitatuations (hurricanes etc.) have demonstrated this repeatedly.
>
> That surprises me. In Missouri, analog (a.k.a. B1) phone lines are
> considered "life saving devices" and have (had?) mandates to be available for
> service even when the power is out.
Sure. That's why I said that a POTS that fails in an hour or so is "poorly
constructed".
Still, any telecom service is going to deal only with limited power failures.
Once the batteries drain, or the generators run out of fuel, *poof*. And any
of them rely on quite complex infrastructure that can, and sometimes will, fall
apart. I still remember a small NH telco which broke 911 service for a full
day because their SONET loop wasn't a loop. They had only bothered to connect
one end, so when a squirrel chewed through a fiber cable the supposedly fault
tolerant connection wasn't, and the whole town went off line.
> This is one of the reasons that TelCo equipment had such massive battery
> backups.
>
> I expect that a true analog (B1) phone line should stay in service even
> without power.
It certainly does, which is why I still use them. Then again, mine is the only
house of about 20 on this one-mile stretch of line that still uses POTS.
paul
