#same device, other USB ID
--- linux-2.6.33-rc5/drivers/isdn/hisax/hfc_usb.c	2010-01-22 00:31:35.000000000 +0100
+++ linux-2.6.33-rc5-w/drivers/isdn/hisax/hfc_usb.c	2010-01-22 19:34:07.000000000 +0100
@@ -84,6 +84,12 @@
 			   "Billion tiny USB ISDN TA 128"}),
 	},
 	{
+	 USB_DEVICE(0x1ae7, 0x0525),
+	 .driver_info = (unsigned long) &((hfcsusb_vdata)
+			  {LED_SCHEME1, {0x80, -64, -32, -16},
+			   "X-TENSIONS USB ISDN TA XC-525"}),
+	},
+	{
 	 USB_DEVICE(0x0742, 0x2008),
 	 .driver_info = (unsigned long) &((hfcsusb_vdata)
 			  {LED_SCHEME1, {4, 0, 2, 1},
--- linux-2.6.33-rc5/drivers/isdn/hardware/mISDN/hfcsusb.h	2010-01-22 00:31:35.000000000 +0100
+++ linux-2.6.33-rc5-w/drivers/isdn/hardware/mISDN/hfcsusb.h	2010-02-09 19:15:07.000000000 +0100
@@ -357,6 +357,12 @@
 			   "Billion tiny USB ISDN TA 128"}),
 	},
 	{
+	 USB_DEVICE(0x1ae7, 0x0525),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {0x80, -64, -32, -16},
+			   "X-TENSIONS USB ISDN TA XC-525"}),
+	},
+	{
 	 USB_DEVICE(0x0742, 0x2008),
 	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
 			  {LED_SCHEME1, {4, 0, 2, 1},