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