When I set the parameter "label" in buttons.cfg, and calling through the FOP2, there is a change of callerid. Instead of the callerid (which is set in the users.conf), of user is set to the "label". How to make that option does not affect the callerid?
(I use FOP2.26 & Asterisk 1.8.11.0)
Currently it is not possible. It is not that simple either as when you originate a call from fop2, you do it via the asterisk manager, not the device itself, and the manager does not know the specific config you might have in your device/setup.
You could use originatechannel and set it to dial a Local/xxx entry, that you can send to some custom dialplan of your writing that can set the callerid based on whatever logic or configuration you have. That *might* work, but I am not totally sure.
Best regards,