To deactivate the Burnley Comms Tower go around the side of the tower.
Use the remote batclaw to create a zipline above the window:
Use the zipline to break through the window and hack the terminal using the cryptographic sequencer.
Use the batclaw to open the vent and get to the vent:
Go through the ventilation shaft and up the stairs to the room with the terminal in it. Use the cryptographic sequencer to deactivate the Burnley Comms Tower.