When true, omits calls to set the connection name attribute through Oracle's OCI. When false (default), the connection name ...

When true, omits calls to set the connection name attribute through Oracle's OCI.  When false (default), the connection name attribute will be set, which is required to enlist in a distributed transaction.  This connection string option should be set to true when using Oracle databases that pre-date 9i as older versions do not support the use of the OCI connection name attribute.