Q. Show the Connection between different networks?
The connection between different stages is made in following manner: all outputs of 1st crossbar switch of first stage are combined with 1st input of every switch of middle stage. (It implies that 1st output of first page with 1st middle stage, 2nd output of first phase with 1st input of second switches of middle stage and so on...)
The O/P (outputs) of second switch of first phase. Stage are combined with 2nd input of various switches of second stage (i.e., 1st O/P of second switch of 1st stage is joined with 2 input of 1st switch of middle stage and 2nd output of 2nd switch of 1st stage is joined with 2nd input of 2nd switch of middle stage and so on.
Similar connections are established between middle phase and output phase (It implies that outputs of 1st switch of middle phase are connected with 1st input of different switches of third phase. Permutation matrix of P in the above illustration the matrix entries will be n.