Samsung DS-5012L - Manual (Page 132)

Convenience Features DS/ITP-5012L Phone User Guide
119
Hello~
2.
Lift the handset or press the [Speaker]
button or [Send] button to connect to or or
the door phone.
3.
If an electric door lock is installed, press [1][3] to
open the door.
Calling the Door Phone
You can call the door phone to listen to what is happening in another
room.
Dial the number of the door phone.
You can listen or speak through
the door phone.