Therefore, it is to be appreciated, that in general the variables transmitted from the modem being tested to the receiving modem can be {HEAD ~ any combination} of {TAIL ~ variables} which allow for transmission of test and diagnostic information 
Therefore , it is to be appreciated , that in general the variables transmitted from the modem being tested to the receiving modem can be { HEAD ~ any combination } of { TAIL ~ variables } which allow for transmission of test and diagnostic information
OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH