By establishing a diagnostic link mode between the two modems, the systems and methods of this invention are able to exchange {HEAD ~ diagnostic and test information} in {TAIL ~ a simple and robust manner} 
in
By establishing a diagnostic link mode between the two modems , the systems and methods of this invention are able to exchange { HEAD ~ diagnostic and test information } in { TAIL ~ a simple and robust manner }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL