websphere ejb context

[zb cong]

hello
i want to migrate from weblogic to websphere,see following code:
properties = new Properties();
properties.put(Context.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
properties.put(Context.PROVIDER_URL, "t3://127.0.0.1:7001");
Contest ctx=new InitialContext(properties);
....................
......................

this is used to get weblogic initial context,how can i modify it to get websphere context?such as how i can modify "Context.INITIAL_CONTEXT_FACTORY" and "Context.PROVIDER_URL" string?
you would better to give me the complete websphere ejb client side code snippet.
thank you

[Tony Chen]

In WAS v5.0:
You can use two different provider URL forms with WebSphere Application Server's initial context factory:
A CORBA object URL (new for J2EE 1.3)
An IIOP URL
examples shown in the InfoCenter:Example: Getting an initial context by setting the provider URL property