Tried DIAL on s Pi Zero with WiFi. The os runs ok, WiFi ok asterisk gives a segmentation fault snd just sits retrying every ten seconds. 
Am I trying the impossible with the Pi Zero? 

Aug 24 14:53:35 repeater systemd[1]: asterisk.service: Failed
        with result 'signal'.

        Aug 24 14:53:45 repeater systemd[1]: asterisk.service: Service
        hold-off time over, scheduling restart.

        Aug 24 14:53:45 repeater systemd[1]: Stopped Asterisk PBX and
        telephony daemon.

        Aug 24 14:53:45 repeater systemd[1]: Started Asterisk PBX and
        telephony daemon.

        Aug 24 14:53:45 repeater systemd[1]: asterisk.service: Main
        process exited, code=killed, status=11/SEGV

        Aug 24 14:53:45 repeater systemd[1]: asterisk.service: Control
        process exited, code=killed status=11

        Aug 24 14:53:45 repeater systemd[1]: asterisk.service: Unit
        entered failed state.

        Aug 24 14:53:45 repeater systemd[1]: asterisk.service: Failed
        with result 'signal'.

-- 
George Csahanin
10100 Carson Ranch Rd.
Crowley, TX 76036
682-708-5716 home
401-338-0568 cel