In operation, a user at either console 120 or 130 may provide {HEAD ~ commands} to either or both of {TAIL ~ control units} 150 and 165 via the proxy server 105 
In operation , a user at either console 120 or 130 may provide { HEAD ~ commands } to either or both of { TAIL ~ control units } 150 and 165 via the proxy server 105
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH