an electrical connector for being mounted on a motherboard , includes an insulative housing having a front mating face providing a receiving cavity extending rearwardly thereinto , an internal circuit board containing a safety insulating and filtering circuitry and a telephone line - side modem controller , a pair of conductive contacts retained to the insulating housing , and a number of footer contacts connected with the internal circuit board for connecting to the motherboard . the safety insulating and filtering circuitry and the telephone line - side modem controller perform partial functions of a modem card assembly . the conductive contacts electrically connect with the internal circuit board and extend into the receiving cavity for contacting with a complementary connector .