A reduced-volume landing gear casing for the landing gear of an aircraft including a box structure to which the landing gear is fixed and which takes up the loads acting thereon. The compositions include a water-soluble first polyelectrolyte bearing a net cationic charge or capable of developing a net cationic charge and a water-soluble second polyelectrolyte bearing a net anionic charge or capable of developing a net anionic charge. The logical profile includes configuration information as well as an extension from a communication distribution system which a device should serve.