This permits {HEAD ~ up to 12 base stations} to operate within communication range of {TAIL ~ one} another without interfering 
This permits { HEAD ~ up to 12 base stations } to operate within communication range of { TAIL ~ one } another without interfering
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH