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« Last post by Feanor on Today at 07:58:23 pm »
ADSL can just-about-work with one leg of the pair disconnected, as you have discovered.
Sounds like you have chosen the wrong white.
Yes, it does matter.
I expect there *is* a tracer colour, if you look closely enough.
The landline phone is a 2-wire system, and needs both ends to work ( like a battery needs both ends connected ).
ADSL is a bit weird and can just-about-work under the severe fault conditions you have created!
Since there are 3 other whites, then trial-and-error might be the easiest method to find out which one you need...
If you have a meter to hand, then measure the DC voltage from the orange to each white in turn. The one you want will show about 48v DC.
Otherwise, You could stick your tongue on the orange and then each of the whites in turn, that would tell you pretty sharpish which one to use...
(Don't actually do that!!...)