The layer specific OSS is configured to selectively request on demand provisioning of bandwidth on {HEAD ~ the sub network} based on {TAIL ~ the predefined bandwidth provisioning policies} 
based on
The layer specific OSS is configured to selectively request on demand provisioning of bandwidth on { HEAD ~ the sub network } based on { TAIL ~ the predefined bandwidth provisioning policies }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL