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