Mainframe access to ORACLE on UNIX

We would like to be able to access a UNIX-based ORACLE RDBMS from an IBM mainframe. I know that ORACLE has various "Transparent Gateways" but I believe these generally work in one direction only (i.e. allowing the UNIX RDBMS to access DB2 for example).  

Does anyone know if it's possible to write a COBOL program, for example, on the mainframe that could access the ORACLE RDBMS on the UNIX box via DRDA or some other mechanism.  

Thanks,
Tony Bravo
tbrav_at_ctp.com

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Tony Bravo <tbrav_at_ctp.com>             Cambridge Technology Partners, Inc.
                                  2361 Rosecrans Ave, El Segundo, CA 90245
                                       Tel: 310-297-3804 FAX: 310-297-3900