Inputs JRC, DJRC, SOF and EOF are connected to {HEAD ~ outputs} of {TAIL ~ a command/flag interrupter} 33 
Inputs JRC , DJRC , SOF and EOF are connected to { HEAD ~ outputs } of { TAIL ~ a command / flag interrupter } 33
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH