RE: [EFM] RE: [EFM-Copper] the merits of 12 kft and +
- To: "'O'Mahony, Barry'" <barry.omahony@xxxxxxxxx>, <cribeiro@xxxxxxxxxxxxxxxx>, "'Stanley, Patrick'" <pstanley@xxxxxxxxxxx>, "'Jack Andresen'" <jandresen@xxxxxxxxxx>
- Subject: RE: [EFM] RE: [EFM-Copper] the merits of 12 kft and +
- From: "Ron McConnell" <rcmcc@xxxxxxxxxxxxx>
- Date: Mon, 5 Nov 2001 16:50:37 -0500
- Cc: <firstname.lastname@example.org>, "'Behrooz Rezvani'" <email@example.com>, "'Frank Miller'" <firstname.lastname@example.org>, "'Vladimir Oksman'" <email@example.com>, "'Copper'" <firstname.lastname@example.org>, <email@example.com>, "'Hugh Barrass'" <firstname.lastname@example.org>, "'Howard Frazier'" <email@example.com>, "'Frank Van der Putten'" <firstname.lastname@example.org>, "John W2XS Meade" <email@example.com>
- Importance: Normal
- In-Reply-To: <86DB568235A8D511ABAC0002A5072CA5CA0622@xxxxxxxxxxxxxxxxxxxxxx>
- Sender: firstname.lastname@example.org
Carlos Ribeiro, CTBC Telecom, says
about telephone/ISDN operation during customer
"...ISDN, but not in all countries;
I believe that the US standard has not
remote power, ..."
Remote powering the ISDN DSL NT via the loop
was being considered in the US in the mid-1980s.
I did some back of the envelope
calculations (easily verified) that showed
that if ISDN were as successful as everyone
expected/hoped/dreamed, the CO battery plant capacity
would have to be doubled to handle the 24 hour,
7 day, 365 day/year power requirements.
I showed the numbers to the Bellcore power folks
and RBOC reps to T1D1.3 (T1E1.4 predecessor)
in the little Bellcore ISDN newsletter.
Full time remote network powering got dropped in a hurry.
Hooks for network powering through the interface
and for customer or network provided battery backup
were included for the cases in which
it was really necessary.
I wonder what the Germans' experience with
battery capacity was/is.