Hi, I'm resending this post from the linux-serial, since this list might be more appropriate. I read a rumor that the AdLink ND6530 USB RS232, RS422 and RS485 isolated adapter is actually a PL2303 based usb serial adapter. I tried it out, and as far as I can tell it works. here is a patch: +++ ../linux-2.6.32.7/drivers/usb/serial/pl2303.h 2010-03-14 22:58:43.168023411 +0100 @@ -134,3 +134,7 @@ /* Sanwa KB-USB2 multimeter cable (ID: 11ad:0001) */ #define SANWA_VENDOR_ID 0x11ad #define SANWA_PRODUCT_ID 0x0001 + +/* ADLINK ND-6530 RS232,RS485 and RS422 adapter */ +#define ADLINK_VENDOR_ID 0x0b63 +#define ADLINK_ND6530_PRODUCT_ID 0x6530 --- linux-2.6.32.7/drivers/usb/serial/pl2303.c 2010-01-29 00:06:20.000000000 +0100 +++ ../linux-2.6.32.7/drivers/usb/serial/pl2303.c 2010-03-14 22:59:49.576026700 +0100 @@ -97,6 +97,7 @@ { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, + { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, { } /* Terminating entry */ }; It would be nice if this goes into the linux main line, since its trivial and adds support for a new device. Best Regards, Manuel -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html