In the preferred embodiment, {TAIL ~ each 62 user group channel} occupies {HEAD ~ approximately 2.16 MHz} 
In the preferred embodiment , { TAIL ~ each 62 user group channel } occupies { HEAD ~ approximately 2.16 MHz }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD