As another example, {HEAD ~ the UE} 501 can use only the SIP data indicator, omitting {TAIL ~ the SIP data packet length information} 
As another example , { HEAD ~ the UE } 501 can use only the SIP data indicator , omitting { TAIL ~ the SIP data packet length information }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL