A line concentrator and external devices wherein {HEAD ~ data} transmitted from {TAIL ~ external devices} within a system and wherein the processing of the received data can be efficiently executed without increasing load on the network is provided 
transmitted from
A line concentrator and external devices wherein { HEAD ~ data } transmitted from { TAIL ~ external devices } within a system and wherein the processing of the received data can be efficiently executed without increasing load on the network is provided
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL 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 OTH OTH OTH