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