{HEAD ~ A bus coupler} for exchanging data between a network constructed for transmitting {TAIL ~ Ethernet telegrams} and a lower level bus system , comprising: 
{ HEAD ~ A bus coupler } for exchanging data between a network constructed for transmitting { TAIL ~ Ethernet telegrams } and a lower level bus system , comprising :
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH