Also, how can I set up a config.ppi file to be automagically selected correctly by faxaddmodem, for the Practical Peripherals modems? I don't know enough shell script to untangle the faxaddmodem awk and grep cleverness properly. And, in case it helps to set it up, here are the +FMxx responses for these modems.
See also the prototype config file descriptions in faxaddmodem(1M) and hylafax-config(4F).