Aiphone 1-Call Master Station with Door Release | AIP-LEM-1DLC The Aiphone LEM-1DLC 1-Call Master Station provides audio communication and door-release control for a single entrance in a compatible dual-master intercom system. It allows two indoor master stations to communicate with the same door station, making it ideal for locations where entrance calls need to be answered from separate rooms or work areas. The station supports push-to-talk audio communication, allowing users to speak with a visitor before activating compatible electric door-release equipment. Its built-in door-release button provides convenient access control from the master station. Designed for desk or wall installation, the LEM-1DLC is suitable for small offices, retail locations, reception areas, warehouses, clinics, and residential properties requiring two indoor answering points. NOTE: No master-to-master communication. Includes In-Use Occupied Lamp Manufacturer's Limited Warranty 1 Year Some Applications Offices Courthouses Hotel/Motel door entry Retail/Convenience Stores Small Secured Facilities