In such a stack it is necessary to provide {HEAD ~ interconnection} between {TAIL ~ the stacked devices} via what is known as a cascade connection in order to allow users connected to one device to communicate with users connected to other devices 
In such a stack it is necessary to provide { HEAD ~ interconnection } between { TAIL ~ the stacked devices } via what is known as a cascade connection in order to allow users connected to one device to communicate with users connected to other devices
OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH