Originally Posted by
NutLoose
I would imagine the AA system only connected to the AA dispatch room, and didn't have the facility to call out.
Nutloosei never used one but I think you are wrong. If it only connect to the control room you would not need 4d.
I think the purpose of the boxes was to provide a facility where the GPO did not put its phone boxes. The latter were sited where there were people whereas the AA/RAC were for motorists out in the countryside.
The next improvement was a radio telephone from the AA. This was hard wired to the car and marketed for women who might need reassurance when driving alone. It only communicated with the control room. I think this was late 60s.