Does JBoss Support transaction propagation to other VM's

[felderr]

In http://docs.jboss.com/jbossas/javadoc/4.0.1-sp1/transaction/org/jboss/tm/package-summary.html you say that the default transaction Service cannot propagate transactions to other VM's!

For me, default means, that there are other transaction services within JBoss! I didn't find any information where I can find those other transaction services and how to configure them. Or does 'default' mean that JBoss does not support transaction propagation to other VM's and that there is no other transaction service embedded within JBoss? So we have to use third party products?

Thx Rene