5
1. When the call button(② on the door station) is pressed, the chime sounds.
2. Adjust the volume switch(①
on the room station) to control the call sound.
3. Pick up the handset(②
on the room station) to talk.
4. Press the door release button(③
on the room station) to open the door.
The door-lock should be instatlled.
5. Place the handset to finish talking.
4.
Operation