Volvo 330 was tracking from new shot to medium stone fill to load a sales truck. Euclid End Dump sitting 5/10 min, was radioed to move forward to let truck through. Euclid backed into cab of Volvo 330 crushing cab, broken windows, broken door. Operator of Volvo was able to jump out of equipment (was not injured). Operator of Euclid was suspected on being phone distracted.