This device has a function that temporarily turn ON & OFF the blocking feature. As default this is set to ON. Please make sure that your device's blocking feature is set to ON by following the steps below:
Press the SET button,
- The display will show SET 1234
Pick up a handset and press 4
- The display will show ON or OFF
If OFF, press the DWN button to change it to ON
Now your call blocker's blocking function is ON.
If you continue having trouble with this, please contact us.