Electronics > Beginners
Cat6/Telephone
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Invader75:
Hi,

We've just had an annexe built. I supplied the Cat6 cable for the electrician to connect up. Just been down there and it appears he's connected it up as a phone line. 🤔

Couple of questions. Obviously I can change the connector and socket over easy enough. But, as we don't yet have a phone line down there yet, is there anyway to use the Cat 6 to carry both a phone signal and internet. I know this sounds like a stupid question, and it probably is. ;-)
Ian.M:
Although slower ethernet modes only need two pairs, its a *really* bad idea to mix ethernet and telephone in the same cable as it drastically increases the risk that you'll fry everything on your network if there is a lightning strike near your house or the phone line to it. 
Invader75:
Ok. Fair point. I must add we're in the suburbs of Cardiff, Wales, with the annexe being single story timber frame.
FrankE:
Don't mix them in the same cable. There's 48V on a telephone cable. The ring signal is 50V ac. There is a risk of crosstalk.
Invader75:
Ok, guess I'll have to run a phone cable down to the annexe separately.

Thanks for you help
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