Cable Forum - View Single Post - VM Phones

Mr_Moo · 03-03-2009, 20:01

Virgins/ntl:telewests network uses 35 volts D.C on their lines and BT uses 55 volts D.C. Now I'm not sure exactly how BT's network works, but considering they use telegraph poles and the line/signal probably has further to travel they would need the extra voltage to carry it. Therefore upon the misfortune of a small commercial power outage the chances that the same source of power is in the same area is slim. Thus being why when you have a power cut in your area and have a BT line, it is not affected.

03-03-2009, 20:01	#26
Mr_Moo Inactive Join Date: Jan 2009 Location: Peterborough Posts: 143	Re: VM Phones - What happens in a power cut? Virgins/ntl:telewests network uses 35 volts D.C on their lines and BT uses 55 volts D.C. Now I'm not sure exactly how BT's network works, but considering they use telegraph poles and the line/signal probably has further to travel they would need the extra voltage to carry it. Therefore upon the misfortune of a small commercial power outage the chances that the same source of power is in the same area is slim. Thus being why when you have a power cut in your area and have a BT line, it is not affected.