Aiphone DB-1SD Sub Master Station for DB-1MD

FEATURES All Call between stations in same residence / office Option button for external device control (N/O dry contact, AC/DC 24V 1.6A Max) Call tone volume control with LED mute indicator Receive volume control Optional Call Extension Speaker (IER-2) Optional external signaling to 3rd party bell or light using RY-ES (used in lieu of IER-2) Door release button (powered by door station)   SPECSCommunication: Hands-free (VOX) or push-to-talk (simplex)Wire Type:Entrance Station to Tenant Master Station: 2-cond., low cap, PE insulation, solid, non-shielded - use Aiphone #871802Tenant Master Station to Tenant Sub Station: 4-cond., low cap, PE insulation, solid, non-shielded - use Aiphone #871804Between Tenant Sub Stations: 4-cond. + 2-cond. when sharing power - use Aiphone #822206 or #871804Distance:Power Supply to Tenant Master Station: 180'(22AWG) 510'(18AWG)Tenant Master Station to farthest Tenant Sub Station: 330'Power Supply to Entrance Station (cumulative): 360'(22AWG) 1,020'(18AW