The invention further comprises {HEAD ~ a method} for switching of wavelength channels through {TAIL ~ the use} of said multi wavelength selective switch 
for switching through
The invention further comprises { HEAD ~ a method } for switching of wavelength channels through { TAIL ~ the use } of said multi wavelength selective switch
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH