This is achieved with a crosspoint switch that has a nonblocking path for each card in either a 4-by-4 or 16-by-16 matrix for a four- or 16-slot chassis, respectively.

• 这是利用一个交叉点开关实现的，对4插槽或16插槽的底架而言，该开关分别以4×4或16×16的矩阵形式，拥有每块卡的一条无阻塞通道。