Connectivity between the Replication Agent for Oracle and the Oracle data server is through the Oracle JDBC thin driver.
The Oracle JDBC driver must be installed on the Replication Agent host machine, and the directory this driver is installed in must be in the CLASSPATH environment variable.
The TNS Listener Service must be installed and running on the primary database so the Replication Agent instance can connect to it. See the Oracle Database Net Services Administrator's Guide.
