For {HEAD ~ callers} who have intentionally and correctly dialed {TAIL ~ a personal telephone number}, upon detection of the typing of the last character of a valid command string, e.g., a pound , a page to the called party is immediately initiated by the bridging and signaling unit 
correctly dialed
For { HEAD ~ callers } who have intentionally and correctly dialed { TAIL ~ a personal telephone number } , upon detection of the typing of the last character of a valid command string , e.g. , a pound , a page to the called party is immediately initiated by the bridging and signaling unit
OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH