11.12. How am I expected to enter these AT commands?

Make what's called a ``direct'' entry in your /etc/remote file. For example, if your modem's hooked up to the first serial port, /dev/cuaa0, then put in the following line:

        cuaa0:dv=/dev/cuaa0:br#19200:pa=none
      

Use the highest bps rate your modem supports in the br capability. Then, type tip cuaa0 and you'll be connected to your modem.

If there is no /dev/cuaa0 on your system, do this:

        # cd /dev
        # ./MAKEDEV cuaa0
      

Or use cu as root with the following command:

        # cu -l``line'' -s``speed''
      

with line being the serial port (e.g./dev/cuaa0) and speed being the speed (e.g.57600). When you are done entering the AT commands hit ~. to exit.