In just a base Asterisk setup one can originate a call by simply entering the follow, per example:
channel originate SIP/number to dial@+outbound context+ application Playback hello-world
In FreePBX this is not the case and returns an error & warning in the +outbound context+ part.
In fact the system is looking for a host name.
channel originate SIP/[email protected] application Playback hello-world
WARNING[C-00000012]: chan_sip.c:6058 create_addr: No such host: vonage-out
Thanks for any tips & hints!