| CALL Button: Function as a door bell button |
| PRG Button: To activate special features. |
| Dial Keypad (1 to 0, *, #): Will work as the normal phone keypad. |
| Sensor: Feedback the Door open status to the system. |
| Relay: Gate open control. |
| Speaker: Paging speaker. |
| 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 wires cabling to the system |