{HEAD ~ The present invention} provides {TAIL ~ an interface mechanism} in a communications gateway for linking users in a heterogeneous distributed system, such as a local area network , to remote services over a circuit switched communications network 
provides
{ HEAD ~ The present invention } provides { TAIL ~ an interface mechanism } in a communications gateway for linking users in a heterogeneous distributed system , such as a local area network , to remote services over a circuit switched communications network
HEAD HEAD 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 OTH OTH OTH OTH