To: neverdem
AT&T adopted direct current for the phone system because of its inherent stability, which is part of the reason that landline phones often survive storms better than the electric grid...Say what?
Methinks that something got lost in the translation.
8 posted on
11/20/2011 10:27:36 PM PST by
Zeppo
("Happy Pony is on - and I'm NOT missing Happy Pony")
To: Zeppo
>AT&T adopted direct current for the phone system
>because of its inherent stability, which is part of the
>reason that landline phones often survive storms better
>than the electric grid... Say what?
Methinks that something got lost in the translation.
That part's true. POTS uses +24VDC TIP and -24VDC Ring.
12 posted on
11/20/2011 10:34:23 PM PST by
Antonello
(Oh my God, don't shoot the banana!)
To: Zeppo
They use both AC and DC on the same phone lines for different functions. They use DC to register an off-hook condition and to power the carbon transmitters (microphones) and AC to operate the ringers. Later phones use the same DC to power the touch-tone electronic circuitry. It’s about simplicity, not stability.
39 posted on
11/21/2011 3:37:16 AM PST by
Fresh Wind
('People have got to know whether or not their President is a crook.' Richard M. Nixon)
To: Zeppo
Methinks that something got lost in the translation. Yup....bat'ries.
40 posted on
11/21/2011 3:52:43 AM PST by
Roccus
(POLITICIAN...............a four letter word spelled with ten letters.)
To: Zeppo
Telco CO gear does run on 48DC but not for th
e reasons in this story
53 posted on
11/21/2011 5:17:08 AM PST by
tophat9000
(American is Barack Oaken)
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