Abstract: A communication assembly is disclosed which is constituted by at least two nodes (A, B, C, D), the nodes (A, B, C, D) each being equipped with at least one port (1 to 3 of A, B, C, D), the ports belonging to distinct nodes (A, B, C, D) being connected by links (a, b, c, d, e, f). When the links or nodes are out of working order, one or more operational networks are constituted whose links connect the nodes in working order and do not bring about loops. The ports are divided in fixed ports (1, 2, 3 of A), in variable ports which are do are dominant (2, 3 of B; 2 of D), and in variable ports which are not dominant (1 of B; 1, 2, 3 of C; 1, 3 of D) laid out in a specific manner one with respect to the other.