The N-8000DI provides contact closure control and monitoring for the N-8000 intercom system. Each N-8000DI has 32 contact closure inputs and 32 contact closure outputs. Outputs may be linked to contact closure inputs, be triggered by a station call, be triggered by IP control or a master station, or be triggered by a fault in the network or a 2-wire (N-8000EX/N-8010EX) line fault for 24/7 supervision. Rack mount and wall mount hardware included.