AIPHONE AI-910DI Direct Select Input/Output Relay Board Card

Direct Select Input/Output Relay Board Card is an interface card that connects to the AI-900 Exchange to enable calling-station indication output, direct select input, and external equipment control output functions. Because these interface cards also have a talk function, by mounting these cards in a control console in combination with a microphone or other devices, the system can be used in substitute for the AI-MS900 Master Station.