A method for switching and redirecting {TAIL ~ optical wavelengths} in {HEAD ~ an optical network}, comprising: 
A method for switching and redirecting { TAIL ~ optical wavelengths } in { HEAD ~ an optical network } , comprising :
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH