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uk.telecom.broadband (UK broadband) (uk.telecom.broadband) Discussion of broadband services, technology and equipment as provided in the UK. Discussions of specific services based on ADSL, cable modems or other broadband technology are also on-topic. Advertising is not allowed.

Open circuit voltage on phone line very very low.



 
 
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  #41  
Old August 15th 17, 08:09 PM posted to uk.telecom.broadband
Roger Mills
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Posts: 275
Default Open circuit voltage on phone line very very low.

On 15/08/2017 13:24, Tim+ wrote:
Roger wrote:
On 15/08/2017 11:23, Abandoned Trolley wrote:


"ADSL is radio" - so why do they bother with the copper at all ?

AT



What makes you think that?


Because Woody said so? Why did you edit out that bit?

Tim


Sorry, yes. On re-reading, I see that he was querying what Woody said.

I don't think Woody meant it literally - but simply that it uses radio
frequencies which can jump gaps better than audio frequencies.
--
Cheers,
Roger
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  #42  
Old August 15th 17, 08:29 PM posted to uk.telecom.broadband
Rodney Pont[_2_]
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Posts: 15
Default Open circuit voltage on phone line very very low.

On Tue, 15 Aug 2017 11:23:06 +0100, Abandoned Trolley wrote:

ADSL is radio so it will jump gaps which will kill a c connection.
Only 1V across a line means it is shafted - open circuit with a very
high resistance load (like a meter) should show 50V or thereabouts.


"ADSL is radio" - so why do they bother with the copper at all ?


ADSL uses radio frequencies but sat very low power so that copper is
needed to carry the signal but it can jump small gaps.

Without the copper you would only be able to transmit to one subscriber
from each exchange because there would only be one set of frequencies
available and not a set for each wire pair :-)

--
Faster, cheaper, quieter than HS2
and built in 5 years;
UKUltraspeed http://www.500kmh.com/


 




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