So, I have an A400P card installed in a system I had ro recently reinstall. The card worked fine under an older install, but the hard drive failed, and in the process we upgraded asterisk to 11 for extra features.
I can run asterisk in CLI, it detects the incoming call ringing, but goes immediately to a hang up, while the incoming caller continues to hear a ringing tone. There are 4 FXO boards installed, and this happens on all 4 channels.