The information processing system 1, wherein the switching hub of the line concentrator apparatus transmits to the external network {HEAD ~ the information} received from {TAIL ~ the first external device} regarding a processing status of the first external device 
The information processing system 1 , wherein the switching hub of the line concentrator apparatus transmits to the external network { HEAD ~ the information } received from { TAIL ~ the first external device } regarding a processing status of the first external device
OTH 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 REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH