You guys will laugh at my problem above and what the issue was..
Checked wiring in BT box was correct. Thought the extensions must be wired differently for some reason (I know they are very old). Opened up one and got confused with odd color wires (I think they were old/faded now). Opened up the other extension box after that though and it was all wired as it should be.
Ok I thought, the junction box after the BT box would show if anything was wired odd as I know one of the extension boxes is correct. Opened that up, all correct so BT box is going to as standard too.
So I look at the BT wiring box again. Just a minute.. the blue/white and white/blue are back to front!!! Stupid *&@^ BT engineer!!
Little screw driver out and 30 secs later the phones are all working properly
Shell (not bad for a girl - I am an IT/network engineer for a living though lol!)
Checked wiring in BT box was correct. Thought the extensions must be wired differently for some reason (I know they are very old). Opened up one and got confused with odd color wires (I think they were old/faded now). Opened up the other extension box after that though and it was all wired as it should be.
Ok I thought, the junction box after the BT box would show if anything was wired odd as I know one of the extension boxes is correct. Opened that up, all correct so BT box is going to as standard too.
So I look at the BT wiring box again. Just a minute.. the blue/white and white/blue are back to front!!! Stupid *&@^ BT engineer!!
Little screw driver out and 30 secs later the phones are all working properly
Shell (not bad for a girl - I am an IT/network engineer for a living though lol!)