In one of many possible embodiments, a system is provided for policy based, on {HEAD ~ demand provisioning} of {TAIL ~ optical transport} bandwidth 
In one of many possible embodiments , a system is provided for policy based , on { HEAD ~ demand provisioning } of { TAIL ~ optical transport } bandwidth
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH