Quad (STQ) is the shielded version of the Twisted Quad (TQ). This is the star quad. The structure of the shielded star quad is the same as that of the star quad. The four cores are twisted together in a cross pattern. Two opposite cores each form a connecting pair. In the shielded twisted quad, a shield, or braided shield, or a double shield consisting of an inner and outer shield is located above this arrangement.