Instead, the bridging and signaling unit is arranged to respond so that it appears to have accepted and executed the command, and moves into {HEAD ~ the next phase} of {TAIL ~ operation}, e.g., music on hold 
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Instead , the bridging and signaling unit is arranged to respond so that it appears to have accepted and executed the command , and moves into { HEAD ~ the next phase } of { TAIL ~ operation } , e.g. , music on hold
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 HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH