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