22-02-2021, 08:21 AM
(21-02-2021, 07:57 PM)Kalee20 Wrote: One of the problems with this is, fibre optics can't carry power. So, power for the 'phone instrument has to be provided locally. It's still not the case that every landline user has mains power available at point of use!
A very long time ago, local battery phone systems were common. Then superseded by the central battery system that we all know. So these changes mark a sort of return to the past.
As for mains not being available, there are 2 possibilities. One is that mains isn't conveniently close to the OR demarcation point. That's a simple if potentially annoying problem. There will also be a tiny minority of lines to premises without any mains power. OR may keep a POTS service running for these few cases. Just as they still offer ISDN to a limited number of customers, despite it being obsolete.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
