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