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