Operating means are provided for operating the first service in connection with {HEAD ~ the second service}, so that {TAIL ~ the first service} can utilize the second channel 
Operating means are provided for operating the first service in connection with { HEAD ~ the second service } , so that { TAIL ~ the first service } can utilize the second channel
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH