Abstract: An electrical connector assembly comprises a first connector (1) and a second connector (1?) having a same configuration with a housing (30, 30?) and a mounting face (34, 34?) adapted for mounting onto a printed circuit board PCB (100) except for a distinguishable portion (353, 353?) provided on the housing (30, 30?) adjacent to the mounting face (34, 34?) thereof. The first connector (1) is not able to be regarded as the second connector (1?) to be mounted onto the PCB (100) due to the different distinguishable portions (353, 353?) of the first and second connectors (1,1?).

Abstract: An electrical connector assembly comprises a first connector (1) and a second connector (1?) having a same configuration with a housing (30, 30?) and a mounting face (34, 34?) adapted for mounting onto a printed circuit board PCB (100) except for a distinguishable portion (353, 353?) provided on the housing (30, 30?) adjacent to the mounting face (34, 34?) thereof. The first connector (1) is not able to be regarded as the second connector (1?) to be mounted onto the PCB (100) due to the different distinguishable portions (353, 353?) of the first and second connectors (1,1?).

Abstract: A modular jack (100) includes an insulative housing (1) defining a receiving cavity (151) for receiving a complementary connector, a contact module (2), a detective switch (3) and an outer metal shield (4) enclosing the housing. The detective switch includes an immovable switch (31) and a movable switch (32) abutting against the immovable switch. The immovable and movable switches respectively include an engaging portion (311, 3212) and a soldering portion (313, 323) for electrically connecting with a printed circuit board. The movable switch further includes a projecting portion (3211) for engaging with the complementary connector.