Patent ID: 7749027

Claim:
An electrical connector system used for a network interface, said network interface providing signal channel between a first side and a second side, said electrical connector system comprising: a substrate forming a plurality of conductive traces; an electrical connector mounted on the substrate; a transformer having a first wire having two opposite ends electrically connected to said first side and a second wire having two opposite ends; a common mode filter having a third wire and a fourth wire that are physically separated from the second wire; wherein the third wire has an end electrically connected to one end of the second wire and an opposite end electrically connected to said second side, and wherein the fourth wire has an end electrically connected to the opposite end of the second wire and an opposite end electrically connected to said second side, thereby a signal channel is formed between the first side and the second side; wherein the transformer comprises a body portion and a plurality of conductive pads attached on the body portion, and the first and the second wires of the transformer are formed in the body portion and respectively electrically connected to the conductive pads.