In the illustrated embodiment, {HEAD ~ the forward signal arrangement} 204 is realized using {TAIL ~ a second order topology} 
is realized using
In the illustrated embodiment , { HEAD ~ the forward signal arrangement } 204 is realized using { TAIL ~ a second order topology }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL