A plurality of connections of the second service are provided, and {HEAD ~ operating means} operate {TAIL ~ the first service} and at least one connection of the second service, so that the first service can utilize the second channel 
operate
A plurality of connections of the second service are provided , and { HEAD ~ operating means } operate { TAIL ~ the first service } and at least one connection of the second service , so that 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH