Hi, I've attached udesc_dump output. Scanning uvisor.c and ucom.c I see no obvious reason why this shouldn't work; the Treo 650 has the same ident as the Zire 31. I can hotsync FreeBSD via Bluetooth, so this isn't a major worry, but it would be good to have backup via wires. Any ideas? Regards, BMS -------------- next part -------------- Standard Device Descriptor: bLength 18 bDescriptorType 01 bcdUSB 0100 bDeviceClass 00 bDeviceSubClass 00 bDeviceProtocol 00 bMaxPacketSize 16 idVendor 0830 idProduct 0061 bcdDevice 0100 iManufacturer 1 iProduct 2 iSerialNumber 5 bNumConfigurations 1 Configuration 0: Standard Configuration Descriptor: bLength 9 bDescriptorType 02 wTotalLength 46 bNumInterface 1 bConfigurationValue 1 iConfiguration 0 bmAttributes c0 (self-powered) bMaxPower 1 (2 mA) Standard Interface Descriptor: bLength 9 bDescriptorType 04 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 4 bInterfaceClass ff bInterfaceSubClass 00 bInterfaceProtocol 00 iInterface 0 Standard Endpoint Descriptor: bLength 7 bDescriptorType 05 bEndpointAddress 81 (in) bmAttributes 02 (Bulk) wMaxPacketSize 64 bInterval 10 Standard Endpoint Descriptor: bLength 7 bDescriptorType 05 bEndpointAddress 02 (out) bmAttributes 02 (Bulk) wMaxPacketSize 64 bInterval 0 Standard Endpoint Descriptor: bLength 7 bDescriptorType 05 bEndpointAddress 86 (in) bmAttributes 02 (Bulk) wMaxPacketSize 64 bInterval 0 Standard Endpoint Descriptor: bLength 7 bDescriptorType 05 bEndpointAddress 07 (out) bmAttributes 02 (Bulk) wMaxPacketSize 64 bInterval 0 Codes Representing Languages by the Device: bLength 4 bDescriptorType 03 wLANGID[0] 0409 String (index 1): PalmOne, Inc. String (index 2): Palm Handheld String (index 3): Standard String (index 4): Serial Interface String (index 5): PalmSN12345678