That example makes it clear. I set that and it works.

The only unfortunate thing it also does is that the extension I am trying to call sees the call as coming from "*80100" instead of from just "100". I guess I can't have my cake and eat it too. :)

Thank you!

I'd like to configure a SIP header so that when I originate calls from FOP2, the phone will auto-answer. My phones support that, and the FreePBX FOP2 admin module has a "Originate Channel" setting for each extension that seems to imply that that can be done but I can't figure out how. What kind of information do I need to put in that field to do this?

Here's what I'm running:
Linux CentOS 5.3
Asterisk 1.4.22
FreePBX 2.5
FOP2 2.11
FOP2 Admin 1.1 FreePBX module

Thanks,
Grant