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