thank you Damian Marek for your response and also thanks to Ravil for your interest in my case thank you very much
but how we adjust user defined bit sequence to control in the OXC1 and OXC2 , I am also put 1 in bit sequence and i remaove node three to make sure that the path take the direction 1, 2, OXC 1, 5, 6, 7, OXC 2, 4 but i found no thing in BER at node 4
please any one help me , i spend alot of time in it and i have no result
and if i want to make big system for DWDM and use 100 channel what is the suggestion ??