BT cable install
Discussion
So I have just drilled the external BT cables into the house.
Is this correct re the wiring?
This often has Orange, White, Green and Black wires. Usually (but not always) Orange and White are the active pair and go to connections 2 and 5.
So
Orange = 2
White = 5
Green =
Black =
But what do they corrolate to the internal colour wiring?
Internal BT have 4 wires with different cables.
Thanks
N
Is this correct re the wiring?
This often has Orange, White, Green and Black wires. Usually (but not always) Orange and White are the active pair and go to connections 2 and 5.
So
Orange = 2
White = 5
Green =
Black =
But what do they corrolate to the internal colour wiring?
Internal BT have 4 wires with different cables.
Thanks
N
Edited by Too Late on Saturday 31st January 15:35
Salesy said:
Number 3 was used when we had real "RING RING" phones.
..and if you need that for an old phone you can use an ADSL filter between the phone and socket to generate the ring.Wiring details are all here. http://www.wppltd.demon.co.uk/WPP/Wiring/UK_teleph... . As pointed out above, 3 isn't generally connected now, and 4 was only ever connected for neatness.
It's easier to follow in the future if you do it right, but it doesn't actually matter - incoming 2 & 5 can be either way around and internally as long as the same colour wire is used to link each terminal it'll be fine.
Sheepshanks said:
It's easier to follow in the future if you do it right, but it doesn't actually matter - incoming 2 & 5 can be either way around and internally as long as the same colour wire is used to link each terminal it'll be fine.
Err..It is polarity dependant, yes, the phone won't care, but your adsl modem will, yes it still works, but not as well.
Scuffers said:
... but your adsl modem will, yes it still works, but not as well.
Evidence?I've always understood it didn't matter, and, bearing in mind how much effort goes into getting decent broadband performance, you'd think Googling this would produce a lot of hits if it was an issue. Yet it doesn't.
Put a meter across the line, it hase a + and -.
In telephony terms, observing polarity is important, and becomes moreso with ADSL, its about noise and cross-talk.
Usually, this will show up as frame alignment issues, the line will sync, but will struggle to maintain stable sync.
From the users POV, line will run in fits and starts, like you have contested connection, most people then blame traffic on their isp's network.
In telephony terms, observing polarity is important, and becomes moreso with ADSL, its about noise and cross-talk.
Usually, this will show up as frame alignment issues, the line will sync, but will struggle to maintain stable sync.
From the users POV, line will run in fits and starts, like you have contested connection, most people then blame traffic on their isp's network.
I always understood the B was for battery and should be at -55V compared to the A. New BT line just installed, the B is at +55VDC, and broadband performance isn't as good as I'd expect. Speedtest.net says 19Mbit/sec, however HTTPS performance is poor, and SSL VPNs keep dropping out. I was blaming Plusnet for caching stuff and having congested links out to the exchanges, but now I'm not quite as sure...
I'm going to swap them round and will report !
I'm going to swap them round and will report !
I am still confused. Sorry chaps. What numbers do I punch down for the green and black cables?
External bt
Orange = 2
White = 5
Green =
Black =
Internal.. Is the correct?
2 = Blue with White Bands
5 = White with Blue Bands
So orange is punched down to 2 and white is 5.. That's correct isn't.
What do I do with green and black.
Thanks
N
External bt
Orange = 2
White = 5
Green =
Black =
Internal.. Is the correct?
2 = Blue with White Bands
5 = White with Blue Bands
So orange is punched down to 2 and white is 5.. That's correct isn't.
What do I do with green and black.
Thanks
N
Edited by Too Late on Sunday 1st February 21:38
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