A method is disclosed that enables the delivery of relevant content to {TAIL ~ a telecommunications user} engaged in {HEAD ~ a call} 
A method is disclosed that enables the delivery of relevant content to { TAIL ~ a telecommunications user } engaged in { HEAD ~ a call }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD