{TAIL ~ The address determination module} transmits an address request message, including access point names corresponding to {HEAD ~ the services}, to a media access gateway and receives an address response message 
{ TAIL ~ The address determination module } transmits an address request message , including access point names corresponding to { HEAD ~ the services } , to a media access gateway and receives an address response message
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH