[Gllug] ADSL on BT phone wires

[Ryland, Peter]

On Wed, 2006-08-16 at 13:34 +0100, Andy Farnsworth wrote:
> The tech then indicated that since the 
> DSL modem has it's own ground, one wire is all that was necessary for 
> the DSL rather than two.  Anyone know if this is just some tech making 
> it up as he went along or what?

Well, in the olden days of UK telegraphy and telephony, it used to run
on a ground return system, meaning that you would only have one wire
running to your home and the signal was grounded at each end forming the
complete circuit.

Considering a phone is only connected to the line and a modem is
typically also connected to the power socket, and hence a ground, it
doesn't seem too far fetched an explanation.

Pete


*****************************************************************************
This communication is confidential and is intended solely for 
the use of the individual or entity to whom they are addressed. 
If you are not that person you are not permitted to make use of 
the information and you are requested to notify 
postmaster at squaregain.co.uk immediately that you have 
received it and then destroy the copy in your possession. 
Squaregain Ltd is authorised and regulated by the 
Financial Services Authority and is a member of the LSE.
******************************************************************************

-- 
Gllug mailing list  -  Gllug at gllug.org.uk
http://lists.gllug.org.uk/mailman/listinfo/gllug