In other embodiments, {HEAD ~ the primary communications test} includes {TAIL ~ the issuer} of the test request sending yet another message, in response to receiving the test reply 
includes
In other embodiments , { HEAD ~ the primary communications test } includes { TAIL ~ the issuer } of the test request sending yet another message , in response to receiving the test reply
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH