Special solution for a municipality in North Zealand

TDH Net has helped a North Zealand municipality renovate a fountain so that the light changes color when you call a number to hear a story.
When visitors call an 80 number, they are given a list of 5 stories they can choose to hear. As soon as they select a story, the color wheel turns on, and the color changes from white to green, for example, in the lights by the cobblestones and in the fountain itself.
The color wheel runs as long as there are calls to the telephone exchange, and turns off when no lines are in use, making the solution as energy-friendly as possible.