Re: Switching wires in the pair improves ADSL connections?



steveybar wrote:

Each Master Socket contains a capacitor, and each PSTN lines' impedance
matching is based on just one line socket capacitor at the customers end
of the line.

NO. The ring cap doesn't come into it.

Of course it does, and so will all the extra capacitors if master sockets
are fitted instead of slave sockets for extra extensions.

Pure nonsense. In most cases the extra cap doesn't even connect to anything
since it's superfluous. The proof of this can be seen by disconnecting the green
(bell) wire ona BT wired extension circuit. Everything works as normal. It's
purely there as a 'legacy' thing for the likes of old rotary dial phones.

The ring circuit on almost every modern phone (actually almost certainly ALL
modern phones) is derived from the A and B lines directly and doesn't use BT's
bell circuit. Hence providing a bell circuit at each outlet simply makes no
odds. It just doesn't go anywhere and can't affect anything. Even if it DID it
still wouldn't be a problem.


If this isn't the case, why then is it the norm for just 1 master socket
and all additional sockets to be slaves (no capacitor)

It's just how BT always did it. It's not that way in other countries and
ADSL works just fine there too. In fact, the very reason for the ring wire
that
messes up the line balance at ADSL frequencies is because of the single
cap idea.

Graham

Yes this is how BT always did it for the reason I have stated.

RUBBISH.


Other countries' network/line impedances are different from that of the UK.

Pure bollocks. You haven't the tiniest clue what you're talking about.

The impedance of a twisted pair at ADSL frequencies is set by the laws of
physics and is around 100 ohms. Much like CAT5 network cable in fact.

STOP TALKING GARBAGE.

Graham


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Relevant Pages

  • Re: Switching wires in the pair improves ADSL connections?
    ... The ring cap doesn't come into it. ... and so will all the extra capacitors if master ... sockets are fitted instead of slave sockets for extra extensions. ...
    (uk.telecom.broadband)
  • Re: Switching wires in the pair improves ADSL connections?
    ... The ring cap doesn't come into it. ... and so will all the extra capacitors if master ... sockets are fitted instead of slave sockets for extra extensions. ...
    (uk.telecom.broadband)
  • Re: Vintage phone wont ring on house wiring
    ... The vintage phone does not ring if plugged through the house extension ... wiring, even with all the other phones unplugged. ... will ring when plugged into any of the extension sockets. ...
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  • Re: landlords
    ... Lights shouldn't be on the ring main. ... Each circuit in the house is a ring main - you have one for sockets, ... Nope lighting circuits are not ring mains. ... They certainly have been in every house I have known the wiring of. ...
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  • Re: Riggers Diary
    ... The ring main configuration was designed to save huge amounts of copper ... This made the sockets less safe, ... The purpose of the plug fuse is to protect the appliance *wiring*. ... fitting a two pin plug into a three pin socket - although some made two ...
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