NEC Color CodingE1 TX RX1 Black-Brown Grey Black3-Grey Black42 Purple Red4-Purple Red Long Grey Black1-Grey Black23 Purple Red1-Purple Red2 Grey Red3-Grey Red44 Yellow Black Long-Yellow Black4 Grey Red1-Grey Red25 Yellow Black2-Yellow Black3 White Black4-White Black36 Yellow Black1-Yellow Red Long White Black1-White Black27 Yellow Red2-Yellow Red3 White Red4-White Red38 Grey Black Long-Yellow Red1 White Red1-White Red2

DBS 3900 COLOR CODING

E1 RX TX

1 White-Blue White-Grey2 White-Orange Red-Blue3 White-Green Red-Orange4 White-Brown Red-Green