RE: Connecting BT lines into home cat5 network

[Keith Doxey <keith.doxey@xxxxxxx>]

Hi All,

Just checked a couple of our adapters with a multimeter.

Nigel is correct in what he says....couldnt disagree with a mate could I !

However, there are differences between the two types of adaptors

Master adapter fitted with ringing capacitor between 2&3 in BT socket
Colour 	 - RJ45 - BT Socket - Function
WHITE/Orange -  1	-	4	-	Earth (seldom used)
BLUE/White   -  4	-	2	-	B leg
WHITE/Blue   -  5 -	5	-	A leg
NOTE....Pin BT3 the bell wire is NOT connected through to RJ45.
Master adapters are really intended for PBX extensions only.

If you have multiple phones you should use secondary adapters and the point
from which the line is distributed should be fed from a master socket or
have a capacitor connected to the krone connectors at the patch panel.
Secondary adapter (no capacitor fitted)
Colour 	 - RJ45 - BT Socket - Function
WHITE/Orange -  1	-	4	-	Earth (seldom used)
ORANGE/White -  2 -	3	-	Bell Wire (Ringing)
BLUE/White   -  4	-	2	-	B leg
WHITE/Blue   -  5 -	5	-	A leg

The neatest way of doing this is to have a block of sockets on your patch
panel that have the required pins connected together so that you just plug
normal patch cords in and patch over your structured wiring. Run a bit of
cable from the rear of the rack to your BT Master socket.

You can also just cut patch cords in half and join all the wires up but
that
gets pretty messy :-(

As Nigel said, there is a removeable plate that you are allowed to wire to
on the more modern NTE5. If you have an older master socket you are not
supposed to wire directly to it but .......




.......lots of people do. (I DIDNT REALLY SAY THAT) :-))

HTH

Keith


> -----Original Message-----
> From: Nigel Orr [mailto:Nigel.Orr@xxxxxxx]
>
> Do you have a linebox or an older master socket?  If you've
> got a linebox,
> just get an RJ45 cable, chop one end off, and put it on the terminals
> behind the 'first layer' front cover.  Older master sockets
> have a single
> front panel, lineboxes have a 2-part panel, you are allowed
> to remove the
> first part, which reveals yet another BT socket underneath and some
> terminals, and wire to the terminals you can see.  Older
> sockets, when you
> remove the panel, have all the surge arrestor and ring
> capacitors visible
> on the back of it, and you're not supposed to wire to them.
>
> You could make up a BT-RJ45 lead, but then you can't hide
> your wiring so
> easily...
>
> Not sure what pairs in the RJ45 the adaptors use, I'd expect
> them to use
> blue for the line and orange for the ring, if that's correct,
> you would
> wire blue w/white stripe to 2 in the BT box, White w/blue
> stripe to 5,
> Orange/White to 3 and White/Orange to 4.  If that doesn't
> work, or only
> works partially (eg no incoming ring on some phones), they
> probably use
> different pairs and you'll need to use a multimeter/continuity
> tester/manual/repeated experimentation to find out which
>
> I expect Keith will be along in a minute to repeat all this,
> add to it...
> or maybe even disagree!!
>
> Nigel
>
>
>
>
>
>


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