That's funny cos I could have sworn Sky (Easynet) and C&W LLU'd lines all use voip protocol for the voice traffic. Of course all the traffic is converted at the exchange to be carried over existing copper equipment all the way up to the customer. There's no reason the same can't be done on the catv coax. This is done in the USA. Though here, they had telephony pairs put in at the same time so don't really need voip over coax. They could though decide to migrate their current phone service to transmit and recieve voice traffic by voip if they wanted like Sky and C&W. Would probably save them cost long term . .but haven't they outsourced the telephony side of the cable network off to BT Wholesale for maintenance?? Think there was a press release about this some time ago.
---------- Post added at 23:26 ---------- Previous post was at 23:13 ----------
in fact they do plan to migrate their existing telephony to voip...
http://www.pcpro.co.uk/news/enterpri...tching-network