It may be any type of link that is dynamically allocated in {HEAD ~ terms} of bandwidth, {TAIL ~ data rate}, modulation or otherwise 
It may be any type of link that is dynamically allocated in { HEAD ~ terms } of bandwidth , { TAIL ~ data rate } , modulation or otherwise
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH