|We need more info. Is the 115 m in one building or spread over two, or more, buildings?|
Since the maximum segment length of Cat 5/5e/6 cable is 100 m, you're going to need to use wireless or perhaps a repeater. But, without more info, it's hard to say which way to go.
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.