====== BT telephone socket wiring ======

{{:electrics:telephones:teleskt.jpg|:electrics:telephones:teleskt.jpg}}

^ 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 |
Be warned however that the above colour codes may not have been followed

The top drawing is also a little incorrect.

BT's leg A connects to terminal 5, and leg B to terminal 2. This was due to a design/manufacturing error.......not that it makes too much odds, 99% of devices will work with either polarity.

Also, terminal 4 is best connected on extensions when two lines share the same cable - it prevents cross talk, and prevents the possibilty of the second lines phones tinkling when the other line rings.

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