In a distributed system, such as {HEAD ~ a local area network} having {TAIL ~ a facility} for synchronous remote procedure calls and multi threading, an interface mechanism for linking client workstations on the distributed system with external switched communications networks is provided 
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In a distributed system , such as { HEAD ~ a local area network } having { TAIL ~ a facility } for synchronous remote procedure calls and multi threading , an interface mechanism for linking client workstations on the distributed system with external switched communications networks is provided
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