A first way path latency from the first node to the second node is substantially equal to a second way path latency from the second node to the first node, and {HEAD ~ all} of a first node transmit delay, a first node receive delay, a second node transmit delay and {TAIL ~ a second node receive delay} are substantially constant 
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A first way path latency from the first node to the second node is substantially equal to a second way path latency from the second node to the first node , and { HEAD ~ all } of a first node transmit delay , a first node receive delay , a second node transmit delay and { TAIL ~ a second node receive delay } are substantially constant
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH