The invention also comprises a method for rerouting and switching or add/drop multiplexing of {HEAD ~ wavelengths} in {TAIL ~ an optical network} 
in
The invention also comprises a method for rerouting and switching or add / drop multiplexing of { HEAD ~ wavelengths } in { TAIL ~ an optical network }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL