From: tnp@invalid.invalid   
      
   On 20/01/2026 15:14, Marc Haber wrote:   
   > The Natural Philosopher  wrote:   
   >> On 20/01/2026 13:34, Marc Haber wrote:   
   >>> The Natural Philosopher  wrote:   
   >>>> On 20/01/2026 09:46, Marc Haber wrote:   
   >>>>> but the   
   >>>>> fiber operators artificially emulate the absurdly asymmetric plans   
   >>>>> from the legacy technologies,   
   >>>> The asymmetry results from traffic analysis done in the early days of   
   >>>> 'consumer Internet'.   
   >>>   
   >>> Both DOCSIS and VDSL vectoring can't do symmetric. They rely on the   
   >>> high data rate going from the central point to the branches.   
   >>>   
   >> It's not a question of 'cant': They were *deliberately designed not to*.   
   >>   
   >> And they don't 'rely' on anything other than a piece of [coaxial?] wire.   
   >>   
   >> The issue is that the total bandwidth (up + down) is limited. So you   
   >> select a protocol that fits most customers usage the best.   
   >   
   > I am really impressed by your technical knowledge.   
   >   
   > Can you explain how VDSL Vectoring with high bandwidth from the   
   > branches to the central point would know about the traffic on the   
   > other pairs to be able to appropriately distort the signal on the one   
   > pair so that it arrives in a readable change?   
   >   
   Look it up. its not exactly rocket science.   
   And has nothing to do really with the asymmetric implementation of   
   broadband signals ...   
      
      
      
   >> ADSL, VDSL and DOCSIS reflect that *choice*.   
   >>   
   >> Back in the day we used other serial protocols that were symmetric. Like   
   >> ISDN   
   >   
   > When we still believed that a twisted pair of subscriber line would be   
   > limited to like 3,5 kHz of bandwidth.   
      
   You really have got your knickers in a twist.   
      
   I only said ISDN because I suspected that uis all you would know about.   
      
   There was T1, or E1, for a start. And T2 and T3.   
      
     All copper based serial...   
   >   
   > Greetings   
   > Marc   
      
   --   
   "The great thing about Glasgow is that if there's a nuclear attack it'll   
   look exactly the same afterwards."   
      
   Billy Connolly   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)