Wiring a 232 to a bellset no 26

[Millay_2010]

Originally Posted by Dave Moll

Interestingly, the black/red/green/yellow leads which I have equate black to white and yellow to red, which is the opposite way round from yours.

The Problems with standards is, there are so many standards to choose from

[russell_w_b]

Originally Posted by Millay_2010

The Problems with standards is, there are so many standards to choose from

Indeed!

I think the easiest way is to refer to the plug numbers, L to R (which, of course, are reversed WRT the connections on the back of the socket!). Instead of referring to the BT standard plug and lead white, blue and red, think instead 2, 4, 5 (or 5, 3, 2 if referring to the terminals on the back of the socket).

Find a method you are comfortable with. I tend to think of the terminals on the back of the socket and take it from there:

White from plug = 5 socket back = 2 plug = common speech / loop / bell.
Blue from plug = 3 socket back = 4 plug = bell (and anti-tinkle via DON mechanism shunting the bell on instrument doing the dialling).
Red from plug = 2 socket back = 5 plug = speech / loop.

Years ago I used to remember it all by association:

A White sports coat (and a pink carnation): A wire
B red (bread): B wire
White Fiver: where white goes on the socket.
Sit on the cool white earth: relative polarity on socket back. And, of course, the telephone system is positive earth, so the others follow!