The link apparatus provides {HEAD ~ circuits} for automatically prepending {TAIL ~ a start} of frame to a message being placed on the bus after determining that the conditions on the bus are suitable for transmitting messages 
The link apparatus provides { HEAD ~ circuits } for automatically prepending { TAIL ~ a start } of frame to a message being placed on the bus after determining that the conditions on the bus are suitable for transmitting messages
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH