I had installed outcall and it worked fine. I could click on an outlook contact and dial one of their numbers. Worked fine. I converted to asterisk 1.6 a few weeks ago and noticed the outcall dialing was broken. When looking at the SIP trace, I saw that asterisk was sending back a "Permission denied" to outcall (which uses the AMI to place the call.) Turns out a new option in asterisk 1.6 was added to the AMI permissions, 'originate', which needs to be added to the read and write acls in manager.conf.