The example embodiment determines a path through the network for optical wavelengths to be supported by the links represented in the database as a function of evaluating {HEAD ~ optical signal characteristics} at {TAIL ~ each link} along a possible path using the advertised optical signal capabilities 
The example embodiment determines a path through the network for optical wavelengths to be supported by the links represented in the database as a function of evaluating { HEAD ~ optical signal characteristics } at { TAIL ~ each link } along a possible path using the advertised optical signal capabilities
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