| System functions |
| Maximum number of bell buttons resp. Call destinations | 208 |
| Maximum number of built-in bell button extensions | 6 (ASI21000-0000) |
| Interface for bell button module | With 4-phased service plug |
| Interface for provided bell buttons | Pluggable screw terminals for up to 16 bell buttons (4 x 4 button matrix) |
| Trigger functions |
| Light switching | With provided bell button |
| Selection and settings |
| Full duplex voice transmission | Yes (for indoor stations with receiver) |
| Allocations for each bell button | Max. 2 indoor stations |
| Volume voice emission / Switching tone | Manually adjustable |
| Communication connection during door release time | Settable |
| Storage | Interchangeably plugged-in |
| Housing, installation, functional extensions |
| Type of installation | Flush-mount |
| Microphone | Integrated and disconnectable |
| Functional extension door release | Connectable with R-terminal |
| Note | The built-in door loudspeakers module is only combinable with the bell button module and/or the display module LCD graphics, 3 keys. For front door stations with display module LCD graphics the loudspeaker module is used. All other modules are freely comb |
