diff -u linux-2.4.23/drivers/usb/serial/ftdi_sio.c modified-2.4.23/drivers/usb/serial/ftdi_sio.c
--- linux-2.4.23/drivers/usb/serial/ftdi_sio.c	2003-11-28 10:26:20.000000000 -0800
+++ modified-2.4.23/drivers/usb/serial/ftdi_sio.c	2004-03-05 15:25:00.000000000 -0800
@@ -407,6 +407,11 @@
 	{ USB_DEVICE_VER(SEALEVEL_VID, SEALEVEL_2803_8_PID, 0x400, 0xffff) },
 	{ USB_DEVICE_VER(IDTECH_VID, IDTECH_IDT1221U_PID, 0x400, 0xffff) },
 	{ USB_DEVICE_VER(OCT_VID, OCT_US101_PID, 0x400, 0xffff) },
+	{ USB_DEVICE_VER(FTDI_VID, LINX_SDMUSBQSS_PID, 0x400, 0xffff) },
+	{ USB_DEVICE_VER(FTDI_VID, LINX_MASTERDEVEL2_PID, 0x400, 0xffff) },
+	{ USB_DEVICE_VER(FTDI_VID, LINX_FUTURE_0_PID, 0x400, 0xffff) },
+	{ USB_DEVICE_VER(FTDI_VID, LINX_FUTURE_1_PID, 0x400, 0xffff) },
+	{ USB_DEVICE_VER(FTDI_VID, LINX_FUTURE_2_PID, 0x400, 0xffff) },
 	{ }						/* Terminating entry */
 };
 
@@ -496,6 +501,11 @@
 	{ USB_DEVICE(OCT_VID, OCT_US101_PID) },
 	{ USB_DEVICE_VER(FTDI_VID, FTDI_HE_TIRA1_PID, 0x400, 0xffff) },
 	{ USB_DEVICE(FTDI_VID, FTDI_USB_UIRT_PID) },
+	{ USB_DEVICE_VER(FTDI_VID, LINX_SDMUSBQSS_PID, 0x400, 0xffff) },
+	{ USB_DEVICE_VER(FTDI_VID, LINX_MASTERDEVEL2_PID, 0x400, 0xffff) },
+	{ USB_DEVICE_VER(FTDI_VID, LINX_FUTURE_0_PID, 0x400, 0xffff) },
+	{ USB_DEVICE_VER(FTDI_VID, LINX_FUTURE_1_PID, 0x400, 0xffff) },
+	{ USB_DEVICE_VER(FTDI_VID, LINX_FUTURE_2_PID, 0x400, 0xffff) },
 	{ }						/* Terminating entry */
 };
 
diff -u linux-2.4.23/drivers/usb/serial/ftdi_sio.h modified-2.4.23/drivers/usb/serial/ftdi_sio.h
--- linux-2.4.23/drivers/usb/serial/ftdi_sio.h	2003-11-28 10:26:20.000000000 -0800
+++ modified-2.4.23/drivers/usb/serial/ftdi_sio.h	2004-03-05 15:25:10.000000000 -0800
@@ -145,6 +145,15 @@
 /* Note: OCT US101 is also rebadged as Dick Smith Electronics (NZ) XH6381 */
 #define OCT_US101_PID		0x0421	/* OCT US101 USB to RS-232 */
 
+/*
+ * Linx Technologies product ids
+ */
+#define LINX_SDMUSBQSS_PID	0xF448	/* Linx SDM-USB-QS-S */
+#define LINX_MASTERDEVEL2_PID   0xF449   /* Linx Master Development 2.0 */
+#define LINX_FUTURE_0_PID   0xF44A   /* Linx future device */
+#define LINX_FUTURE_1_PID   0xF44B   /* Linx future device */
+#define LINX_FUTURE_2_PID   0xF44C   /* Linx future device */
+
 /* Commands */
 #define FTDI_SIO_RESET 		0 /* Reset the port */
 #define FTDI_SIO_MODEM_CTRL 	1 /* Set the modem control register */