diff -Naur linux-2.6.12.orig/drivers/usb/serial/pl2303.c linux-2.6.12/drivers/usb/serial/pl2303.c
--- linux-2.6.12.orig/drivers/usb/serial/pl2303.c	2005-06-17 23:48:29 +0400
+++ linux-2.6.12/drivers/usb/serial/pl2303.c	2005-12-24 23:17:11 +0300
@@ -94,6 +94,7 @@
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
 	{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
 	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
+	{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_S75) },
 	{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
 	{ }					/* Terminating entry */
 };
diff -Naur linux-2.6.12.orig/drivers/usb/serial/pl2303.h linux-2.6.12/drivers/usb/serial/pl2303.h
--- linux-2.6.12.orig/drivers/usb/serial/pl2303.h	2005-06-17 23:48:29 +0400
+++ linux-2.6.12/drivers/usb/serial/pl2303.h	2005-12-24 23:16:55 +0300
@@ -55,6 +55,7 @@
 
 #define SIEMENS_VENDOR_ID	0x11f5
 #define SIEMENS_PRODUCT_ID_X65	0x0003
+#define SIEMENS_PRODUCT_ID_S75	0x0004
 
 #define SYNTECH_VENDOR_ID	0x0745
 #define SYNTECH_PRODUCT_ID	0x0001