On Sun, 3 Feb 2019 15:17:28 -0500
James Knott
On 02/03/2019 03:10 PM, Dave Howorth wrote:
No VoIP here. We love POTS with an unpowered phone, as I said. I like to think it will keep working even if the whole Internet is fried.
The whole world is moving to IP, including the phone system. Also, your "unpowered" phone gets power from somewhere, unless it's two cans and a string. This means batteries and power backup. The batteries used to be in the central office, but now are often located elsewhere, closer to the customer. Also, with the move to fibre, there's no longer a copper path back to the CO for power, for many phones.
Aw shucks, you blew my lifelong cuddly blanket away :) I do tend to think that Openreach probably spends more time thinking about keeping the power on than I do though, so I'll keep my part simple. I once spent some time working with a telecoms supplier in London. They supplied ATM connections so clock was important to them. Their main timing was provided by a GPS clock. The backup was another GPS clock. They had another two backups that were GPS clocks. Only after all four had failed did they get to the fourth backup, which was an atomic clock. They still had to shut their entire network down one weekend because somebody had wired the incoming mains incorrectly when the place was first built. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org