Is JBoss 7.1.1 fully EJB 2.1 compliant?
It is EJB-2.x compliant as stated in the release notes for AS 7.1.0 for the full Java EE 6 profile:
EJB 3.1 Full - Adds a number of key features including remote communication, asynchronous method invocation, timers, message-driven beans, and legacy EJB 2 compatibility.
It remains the same for JBoss AS 7.1.1 as it is an update to JBoss AS 7.1.0 support.
source to share