Procedure NTCLS (
	Lun: Integer;
	Efn: Event_flag;
	VAR Iosb: Io_Status_block
	);
   EXTERNAL;
{*USER*
 
This call ends all task network activity. All open logical links are aborted,
and all network luns are freed. Most pending network activity is discarded.
If incomming connect requests are in the network data queue, the task is
rescheduled.
 }