Normally in Spain that socket should be prepare for a satellite signal after year 2011., that satellite signal is for canal digital spain. (Astra 19° east. If your house was building before that year. the socket is prepared for radio signal (FM).
In serena gran net has a fiber optic dish...I dont know how is it working at the moment, cause I'm fiting satellite dishes for freesat in that comunity for individual houses. This dishes can get the sky signal but you need a box that opened or a sky box with suscriptor.
Feel free to make any question regards