The standard MIMO matrix is a multiple-input, multiple-output matrix of size NxM; N being the number of inputs and M, the number of outputs. This may also be known as a Blocking Matrix. While being multiple-input, multiple-output, it ​will allow a single connnection from any input to any output at a time. This means that the user can have Input 1 connected to Output 2, Input 2 connected to Output 1, and Input 3 connected to Output 3, all at the same time.