In Austria these wires are called A and B, white and brown in phone cords, yellow and brown for fixed wiring. Typical cable for fixed work is 3 (on newer work 4) conductor solid SVT-like with the colors yellow, brown, green and blue, the latter sometimes used for 2nd line. Blue exists only on newer cables, green was used (I believe) for extra bell.
One I have seen requires a 200V DC supply. Wonder where to get that in a country with 220V AC supply?
Old color code for fixed wiring (maybe 1960ies and earlier) was white for a, red for b and green. The letters for the lines must be pretty old here, as I found them on a phone from 1949. They're used in Germany as well.
