Asterisk <-SIP-> Avaya Communication Manager

Asterisk SVN-branch-11-r402709 running on CentOS 6.3
Avaya Communication Manager 6.0.1

I am interested in creating a SIP connection between Asterisk and Avaya Communication Manager. Has anyone done with without the use of Avaya Aura Session Manager? If so, I’d appreciate any configuration help I can get.