Hayes Microcomputer Products Mwave - Manual (Page 8)

during the build process.
Setup the serial driver to recognize the UART provided by the ACP driver. 2.
setserial /dev/ttyS0 autoconfig
NOTE
Substitute /dev/ttyS0 to match the serial port you
have configured the DSP to use.
NOTE
You may wish to create a symbolic link from
your modem device to your serial device for
convenience. Example: ln −s /dev/ttyS0
/dev/modem
The ACP Modem is now available for use by your favorite dialing application.
Linux ACP Modem (Mwave) mini−HOWTO
2.4.2. Running ACP Modem Application 6