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jessy1616bike
Junior Member
Joined: 19 Apr 2008
Posts: 22
Location: TORQUAY
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 Posted: Thu May 15, 2008 7:12 pm Post subject: wiring for bt master socket?help with colors.......... |
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hi all,i need help with the the wiring of a master socket which was removed by the previous owner...i know its the property of bt but they want £100 to fit the socket!....the wire are as follow,4xyellow,1xwhite,1xblack,1xgreen,1xorange,im thinking of switching from cable to talk talk,so will need to have a working master socket,any idea on color?  thanks
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Hoovie
Devon DIYer
Joined: 27 Jul 2007
Posts: 8040
Location: East Devon
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| Posted: Thu May 15, 2008 7:39 pm Post subject: |
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Hi Jessy,
I am gonna guess your telephone line comes in on an overhead cable 
Have a look at this post and all will be revealed in 2nd from last message 
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jessy1616bike
Junior Member
Joined: 19 Apr 2008
Posts: 22
Location: TORQUAY
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| Posted: Thu May 15, 2008 9:09 pm Post subject: |
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hi,yes it comes off a pole in the lane behind my garden.....where is it i should look?thanks
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Hoovie
Devon DIYer
Joined: 27 Jul 2007
Posts: 8040
Location: East Devon
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| Posted: Thu May 15, 2008 9:19 pm Post subject: |
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| jessy1616bike wrote: |
| hi,yes it comes off a pole in the lane behind my garden.....where is it i should look?thanks |
Sorry - I am a right plank!! I thought I pasted this link in my message
http://www.ultimatehandyman.co.uk/forum1/can-i-get-rid-of-this-t9057.html 
The last but one post in that thread tells you what the colours are, courtesy of the UHM Phone Expert
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jessy1616bike
Junior Member
Joined: 19 Apr 2008
Posts: 22
Location: TORQUAY
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| Posted: Fri May 16, 2008 4:55 am Post subject: |
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great thanks for that....could i connect the orange and white into the master socket?and if so which wires go where?thanks rob
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thescruff
Senior Member
Joined: 10 Mar 2008
Posts: 5712
Location: Bath
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| Posted: Fri May 16, 2008 6:49 am Post subject: |
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Hi,
The standard layout was ;
No1 green/white
No2 blue/white
No3 orange/white
No4 white/orange
No5 white/blue
No6 white/green
Incoming to No 2 & 5
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Hoovie
Devon DIYer
Joined: 27 Jul 2007
Posts: 8040
Location: East Devon
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| Posted: Fri May 16, 2008 6:50 am Post subject: |
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So the chances are Orange and White are the active pair (it is slightly possible that green and black are, but assume not for the time being)
Orange should go to connection 2 (maybe called A)
White should go to connection 5 (maybe called B)
They are actually swappable usually so don't worry too much about getting them mixed up.
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EJJ150847
Senior Member
Joined: 04 Jan 2008
Posts: 1451
Location: Fareham, Hampshire
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| Posted: Fri May 16, 2008 7:54 am Post subject: |
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Here is some info on telephone coloours and uses, I think they are the same from when I did my 'phones, print it or save it somewhere.
John
B - W = Blue with thin white bands
W - B = White with thin blue bands
O - W = Orange with thin white bands
Colours shown in brackets are for use when
existing GREY or Cream cable is used.
(O) - Orange (B) - Blue (G) - Green
Although pin 4 has no function in a domestic installation it is usually
connected for the sake of neatness.
The BT Drop Cable (The cable coming from the outside world)
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 in the master socket. In some master boxes (such as the type with a removable front section) they go to two connectors marked A and B.
Which way round they are connected usually doesn't matter but some modems (especially older USA sourced ones) and some answering machines are fussy about polarity, so it's wise if possible to check the voltage on the line and connect -48V to the B leg (5) and 0V to the A leg (2) in the master socket.
Internal Cabling
Conn No. Usual Cable Colour Carries
1 N/A No connection
2 Blue with White Bands, Speech and Ringing
3 Orange with White Bands Ringing
4 White with Orange Bands Not used but usually connected for neatness
5 White with Blue Bands Speech and Ringing
6 N/A No connection
An Important Note on Colour Codes
The colour code shown above is the one which would normally be used by BT. HOWEVER it isn't always adhered to, especially if internal wiring in a new house has been installed or modified by previous occupants.
You should never rely solely upon the colour code - always check both ends of the cable.
Fault Finding
No ringing - Terminal 3 disconnected
Phone ringing continuously.-Terminals 2 and 5 swapped (2 at one socket connected to 5 on another and vice versa)
Very poor speech quality, possibly poor bell. -Terminal 3 and 2 or 3 and 5 transposed
Ringing but no speech (or very poor speech) and can't dial out. Wire between terminals 2 or 5 broken.
Testing the cabling You have an installation where the main socket works and the remote in the garage roof doesn't. You need to test the continuity of the circuit. So you can use a very long lead with and a test meter - or cheat.
* Firstly, disconnect the BT line completely.
* In the remote end bridge any two terminals (make a note of which two).
* Measure continuity between these two wires at the master socket end - should be no more than a few ohms.
* Repeat for the second pair of wires.
* If either show a fault swap the combinations - so if you tried 2 and 4 and that was OK, and then 3 and 5 and that failed, you know 2 and 4 are both good so trying 2 and 5 and 2 (or 4) and 3 will show you the faulty wire.
OK - so you have tested the cables and there is 150 yds of cable buried in the newly decorated wall and only 2 wires have continuity - what do I do??
This is about the only occasion where you cheat and use a second master socket.
The second master gives you back your ring signal so connect the two working wires to terminals 2 and 5 on the new master and hope for the best!
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jessy1616bike
Junior Member
Joined: 19 Apr 2008
Posts: 22
Location: TORQUAY
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| Posted: Fri May 16, 2008 4:40 pm Post subject: |
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thank you very much for the help and replies....  rob
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jultom
Junior Member
Joined: 15 Sep 2008
Posts: 1
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| Posted: Mon Sep 15, 2008 1:08 pm Post subject: |
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| Hi did this work please, i have the same problem, moving in 2 weeks and bt want £125 to fit new socket |
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thescruff
Senior Member
Joined: 10 Mar 2008
Posts: 5712
Location: Bath
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| Posted: Mon Sep 15, 2008 1:18 pm Post subject: |
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Hi 
It works if you follow the instructions.
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