General Question about WAS and JMS

My Client has ERP 2004 installed on WAS 6.40. It needs to be interfaced with TIBCO for message exchange. We don't have XI, just ERP 2004. My question is that does WAS 6.40 have JMS messaging capability? My guess is yes, but I don't know where to find the clue. Can JMS be configured in Visual Administrator? Can I use web services generated from BAPIs to interface with 3rd-party messaging system over JMS? If yes, can someone point me to any documentation about it?

Millions of thanks,

Chao