One of my friends was a part of NIT Calicut and elaborated on the situation. Here is what he says.
As he mentions, the rules and regulations of NIT Calicut have not witnessed many changes in the past few years. This means, during the first year, students generally can not bring laptops as is stated in the rulebook. But, there are a reasonable number of students who still bring their respective laptops from the beginning of the first year.
The first-year hostels for the boys do not possess LAN facilities. However, there might be facilities of the same in the girl’s hostel since it is a combined complex accommodated by students of each year.
Although the rules state otherwise, you can still bring your laptop in the first year.