The example embodiment maintains a traffic engineering database of values representing characteristics of links in the network, through storage of integer values representing {HEAD ~ advertised optical signal capabilities} of {TAIL ~ links} between the multiple optical nodes 
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The example embodiment maintains a traffic engineering database of values representing characteristics of links in the network , through storage of integer values representing { HEAD ~ advertised optical signal capabilities } of { TAIL ~ links } between the multiple optical nodes
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH