signaling said {HEAD ~ PBX} to connect said {TAIL ~ adapter} through said PBX to said voice message system, 
signaling said { HEAD ~ PBX } to connect said { TAIL ~ adapter } through said PBX to said voice message system ,
OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH