Electrical connector system with magnetic module

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;
• the transformer further having a magnetic core defining two holes parallel extending therethrough and forming a center wall between the two holes, the wires of the transformer winding around the center wall and through said two holes;
• wherein the common mode filter further comprises a ringy magnetic core, the third wire and the fourth wire winding around said magnetic core to form a common mode module for filtering common noise in the signal channel.