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