If {HEAD ~ a connection} from {TAIL ~ User PC} 20 to Weather Server 26 is established, the path becomes green 
If { HEAD ~ a connection } from { TAIL ~ User PC } 20 to Weather Server 26 is established , the path becomes green
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH