connecting said calling party on said DID trunk line from {HEAD ~ said central office} through said {TAIL ~ PBX} to said voice message system 
through
connecting said calling party on said DID trunk line from { HEAD ~ said central office } through said { TAIL ~ PBX } to said voice message system
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH