The controllers may coordinate {TAIL ~ communication} between respective USB transceivers 730A, 730B and {HEAD ~ isolator transceivers} 740A, 740B 
The controllers may coordinate { TAIL ~ communication } between respective USB transceivers 730A , 730B and { HEAD ~ isolator transceivers } 740A , 740B
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH