However, the page is not initiated until it is determined that both 1) the entire time for the announcement has elapsed from {HEAD ~ the receipt} of the callers call, i.e., {TAIL ~ the time} of commencement of billing has arrived, and 2) the caller remains on the call at that time 
However , the page is not initiated until it is determined that both 1 ) the entire time for the announcement has elapsed from { HEAD ~ the receipt } of the callers call , i.e. , { TAIL ~ the time } of commencement of billing has arrived , and 2 ) the caller remains on the call at that time
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 OTH OTH OTH OTH OTH OTH OTH 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