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