Device type: Built-in door loudspeaker, Communication technology: TCS:BUS, Installation type: Can be integrated, installed behind on-site front panels, the design of the existing front panel should be clarified in advance., Audio transmission: Hands-free (standard), two-way communication (can be activated), full-duplex hands-free for indoor stations with handset possible, can be activated in configo, Number of bell buttons: up to 16 can be connected., Number of bell button extensions: up to 6 built-in bell button extensions (ASI21000-0000 with a maximum of 32 bell buttons each) can be connected, Removable microphone (mm): Length of microphone cable: 250 mm / removable for acoustic decoupling, Volume of acknowledgement / advisory tone: adjustable, Conversation volume: adjustable, Number of door calls (indoor stations per bell button): 2 indoor stations can be assigned to each on-site bell button., Light switching: Light switching function on unprogrammed bell button, Connection of bell buttons: on plug-in screw terminals., Module integration: 4-pin connector for 4-pin connection cable, connection and operation of modules of the AMI series, error display: error display: optical/acoustic, error flashing time (t = 0 - 255 s) adjustable with configo, operating display: via LED pictograms: calling, speaking, door opening, error and programming mode, commissioning and configuration: commissioning and configuration: manual, with service device, with configuration software, slot: 1 slot for exchangeable memory of the system configuration (ASI12000 or ASI11000). , 1 slot for data transfer from TCU2 memories, activation of additional functions: accessibility, buzzer function (acoustic door opener simulation for DC door openers), delay ex works: OFF, adjustable 1 s to 8 s, button delay (t = 0 to 25.5 s) can be activated and adjusted with configo, talk time ex works: 56 s / adjustable, slave mode., LED display: LED pictograms 'accessibility', can be activated in configo, if not required, the pictogram cover can be removed and hidden behind the front panel, when the 'accessibility' function is activated, the optical door opener signal can be delayed (t = 0 to 25.5 s), dimensions HxWxD (mm): 67x68x38, design: built-in housing, mounting dimensions HxW (mm): 75x85x40, material / color: plastic / black, permissible ambient temperature (degrees C): -25 to +55 degrees C, use indoors or in protected outdoor areas, protection class: IP24, supply voltage: +24 V plus/minus 8% (supply and control unit), current consumption, idle (mA): Ia= 0.2 mA, IP= 3 mA, current consumption, maximum (mA): 24.3 mA, number of wires: 3-wire required, length of microphone cable: 250 mm