In an embodiment, a dummy plug apparatus is provided for insertion into a modular jack to prevent connection/communication with a circuit, device or system that is connected to the jack. An example dummy plug apparatus includes a jack-engaging portion with a tab that releasably engages with a portion of the jack; a tag portion that extends from the jack-engaging portion, the tag portion being configured to bear indicia thereon; and a living hinge that interconnects the jack-engaging portion and the tag portion. The dummy plug apparatus may be configured such that the jack-engaging portion, the tag portion and the living hinge have a structure that is one-piece, unitary or integral-molded or formed.