| CALL Button: Function as a door bell button |
| PRG Button: To activate special features or enter a door via nemeric password |
| Dial Keypad (1 to 0, *, #): Will work as a normal phone keypad for dialing stations |
| Sensor: Feedback the Door open status to the system |
| Prox Sensor for reading of Proximity cards |
| Microphone: Used for Handsfree answer back |
| Four 7-segment blue LED: Show the Clock, dialing digits, system status, etc |
| Two wire cabling to the system |
| Connects to digital station port - Large quantity of ACP's can be deployed in a single system |