{TAIL ~ a second device} connected with {HEAD ~ the pull up voltage supply circuit} and the first device by the bus 
{ TAIL ~ a second device } connected with { HEAD ~ the pull up voltage supply circuit } and the first device by the bus
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH