Also, the bridging and signaling unit responds by beginning its next mode of operation, e.g., playing so called music on hold to the caller, which is done while waiting for {HEAD ~ receipt} of {TAIL ~ the called partys} return telephone call 
of
Also , the bridging and signaling unit responds by beginning its next mode of operation , e.g. , playing so called music on hold to the caller , which is done while waiting for { HEAD ~ receipt } of { TAIL ~ the called partys } return telephone call
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH