{HEAD ~ An apparatus} and method for routing {TAIL ~ optical signals} in which at least one demultiplexer receives and demultiplexes an incoming wavelength division multiplexed optical signal into n individual channels 
for routing
{ HEAD ~ An apparatus } and method for routing { TAIL ~ optical signals } in which at least one demultiplexer receives and demultiplexes an incoming wavelength division multiplexed optical signal into n individual channels
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH