You still have to call 1-1-2 (Danish 9-1-1) yourself, through i think the machine has a speaker and mentions it.
According to Wikipedia, it even works in the US if dialed from a cell phone, by being forwarded to 911 by the network. That I didn't know, since the "cultural presence" of 911 is pretty big even over here in Sweden.
[1]: https://en.wikipedia.org/wiki/112_(emergency_telephone_numbe...