The above telephone is wired as follows:-
On the main circuit Board
T1 - Red wire of handset cord.
T2 - Green wire of handset cord and grey/brown wire of switchook.
T3 - Blue wire of handset cord.
T5 - Nothing connected.
T9 - Nothing connected.
T10 - Yellow wire of handset cord.
T19 - Nothing connected.
T19A - Grey/white wire of switchook.
On the small terminal strip.
Y - Nothing connected.
X - Blue of line cord, grey/yellow wire of switchook and wire to bell.
G - Green of line cord.
L2 - Red of line cord and black of handset cord.
L1 - Grey/green wire of switchook, White wire of line cord and wire to bell.
Regulator (If fitted - blue cylindrical object)
Connect to T3 and T10.
The bell is 4000 ohms resistance.
Special Range Telephone Suffix's
A = NO RECALL, CALLING DEVICE
B = NO RECALL, NO CALLING DEVICE
C = RECALL, CALLING DEVICE
D = RECALL, NO CALLING DEVICE
G = MF DIALLING