#
#	USB-to-Serial Modem Notes
#
#	Paul Littlefield <paul.littlefield@bigfoot.com>
#
#	2006-04-07 22:28:50
#

# Plug the USB device into the computer and run the 'lsusb' program from the 'usbutils' package:
> lsusb
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 004: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
Bus 001 Device 002: ID 0451:2046 Texas Instruments, Inc. TUSB2046 Hub
Bus 001 Device 001: ID 0000:0000

# Build a new kernel including the following drivers:
> cd /usr/src/linux
> make menuconfig
Device Drivers  --->
	USB support  --->
		USB Serial Converter support  --->
		<*> USB Serial Converter support
		<*>   USB Prolific 2303 Single Port Serial Driver
> make && make modules_install

# Reboot and check the kernel log for correct messages:
> dmesg |grep -i 'usb
usbcore: registered new driver usbserial
drivers/usb/serial/usb-serial.c: USB Serial Driver core v2.0
drivers/usb/serial/usb-serial.c: USB Serial support registered for PL-2303
usb 1-2.2: PL-2303 converter now attached to ttyUSB0
usbcore: registered new driver pl2303
drivers/usb/serial/pl2303.c: Prolific PL2303 USB to serial adaptor driver v0.12

# Create the character node device:
> mknod /dev/ttyUSB0 c 188 0

# Test modem by sending standard command:
> echo atz > /dev/ttyUSB0

# For further testing, install the 'minicom' package:
> emerge -av net-dialup/minicom
> minicom -s
Serial port setup
	A -    Serial Device      : /dev/ttyUSB0
Save setup as dfl
Exit from Minicom
> minicom
ATI3
TP560 Data/Fax/Voice 56K Modem
CTRL-A Z
X