A communication system includes a plurality of channels, a first service that utilizes at least a first channel for transmission, and a second service that utilizes {TAIL ~ at least a second channel} for {HEAD ~ transmission} 
A communication system includes a plurality of channels , a first service that utilizes at least a first channel for transmission , and a second service that utilizes { TAIL ~ at least a second channel } for { HEAD ~ transmission }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD