You will have to follow the correct way to add override configuration parameters to a phone by following the the steps outlined in this article.
|It configures the ring tone as a fixed volume.
|Blank- The user can adjust the ringer volume on the phone.
0 to 15 - The user cannot adjust the ringer volume on the phone, the ring tone is the configured volume.
|It configures the adjustable minimum ringer volume on the phone.
Note: It only takes effect on the ringer volume of the speaker on the phone. After the headset is connected, the ringer volume can only be controlled by the headset itself.
|Integer from 0 to 15
This configuration limits the phone to a volume level between 3 and 15.
This configuration will force the phone to ring at a volume level of 5 out of 15 and cannot be adjusted.