Sure you can. You need to have the appropriate Oracle ODBC driver installed on your server, configure your Linked Server and make sure that RPC is checked on the Server Options tab.
Now you should be able to make a call to the Oracle Stored Procedure. Something like:
EXEC LinkedServerName..SchemaName.ProcedureName
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If most people are not willing to see the difficulty, this is mainly because, consciously or unconsciously, they assume that it will be they who will settle these questions for the others, and because they are convinced of their own capacity to do this. -Friedrich August von Hayek
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