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