In some alternative embodiments, {TAIL ~ terminal 501 m} might communicate via {HEAD ~ other means} with content terminal 502 n 
In some alternative embodiments , { TAIL ~ terminal 501 m } might communicate via { HEAD ~ other means } with content terminal 502 n
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH