In the Administration COnsole of WAS 7, on the Applications > Application Types > WebSphere enterprise applications > application > EJB JNDI names section,
Below you have table with default names. Each bean gets short and long form. You can override default using ibm-ejb-jar-bnd.xml file or during installation via console. During module startup bindings will be visible in SysyemOut.log
You can read about default bindings here: http://pic.dhe.ibm.com/infocenter/wasinfo/v7r0/topic/com.ibm.websphere.express.iseries.doc/info/iseriesexp/ae/cejb_bindingsejbfp.html
Description Binding pattern
Short form local interfaces and homes ejblocal:
Short form remote interfaces and homes
Long form local interfaces and homes ejblocal:#
Long form remote interfaces and homes ejb/#
The component-id defaults to //