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Sqwertz[_53_]

On Fri, 16 Apr 2021 19:52:27 -0700 (PDT),
wrote:

> On Friday, April 16, 2021 at 8:56:07 PM UTC-5, Taxed and Spent wrote:
>>
>> On 4/16/2021 6:52 PM, wrote:
>>>
>>> Here, copper wiring is no more. Everything now is digital and copper
>>> wiring is no longer installed or even maintained. The downside to
>>> digital service is when electrical power is lost so is the phone service
>>> and no internet service, either.
>>>
>> That is not necessarily true. And you need to have your phone and modem
>> on a UPS.

Corded handset phones that are not designed for PBX will (should)
still work without power, but just for voice and generic rings. Any
integrated answering machine or digital features will be defunct
without power. They have pass-through current and continuity from
the phone line connected to the router. Only your router needs to
have power (and any separate ObiTalk-like device) for your attached
VoIP phone line to provide your phone the continuity to carry voice
calls.

BUT:

That incoming "RING RING" can drain the shit out of your UPS
100-500X times faster than just speaking on the phone for the same
time(*). So answer your phone ASAP or keep the phone unplugged until
you need to make outgoing calls in a power outage when using a UPS.
You don't want spam callers ringing your phone on your UPS-powered
phone.

(*) Remember the old movies where they'd click the phone hook to get
a line out? Only the ringing of the phone required any real power.
For voice, the mere clicking of the Off-Hook lever or the sound of
voices vibrating the magnets in the phone's speaker and mouthpiece
provide the current necessary to travel for miles until it was
acknowledged at an operators station. Where it was then slightly
amplified (still with very low voltage), and passed onto somebody
else at the other end.

The ringing, OTOH, could take up to 75V and 2amps back then (we had
those obnoxious bells mounted on our floor joists back then). But
12v and .5 amp draws are more typical on today's phone lines for
ringing.

I'm sure John could have told you the same thing, seeing as how he
has all the degrees in this shit.

-sw