Important
Phone Apps are designed to work only with Sangoma IP Phones. Please see our End of Sale notice here on Phone Apps with 3rd Party Phones.
Press the DND button on your phone.
Here you can see the Enabled field is set to "No."
Pressing the Change button will change the Enabled field to "Yes."
On phones that support a BLF light with the button, you will now see the DND button is red, informing you that DND is enabled.
On phones that support center screen notifications, the status of "DND enabled" will also display any time DND is enabled, as shown below.