Hi list, Maybe a bit offtopic... From my understanding the cs60-usb is seen by linux as a composite device, with audio device and hid: usb 3-1: new full speed USB device using uhci_hcd and address 7 usb 3-1: configuration #1 chosen from 1 choice drivers/hid/usbhid/hid-core.c: usb_submit_urb(ctrl) failed drivers/hid/usbhid/hid-core.c: timeout initializing reports input: Plantronics CS50/CS60-USB Headset as /class/input/input8 input,hiddev0: USB HID v1.00 Device [Plantronics CS50/CS60-USB Headset] on usb-0000:00:1d.0-1 Attached is the lsusb -v result for the device. Audio works fine (with snd_usb_audio), and I was able to access the various buttons (pickup/answer, mute, volume) from userspace (using /dev/hiddev0 or /dev/input/eventX). Now there's one more functionnality available on Windows: when the handset is on base and a calls comes in, the base rings. Is this doable from a Linux program ? Thanks, -- Jean-Denis Girard SysNux Syst?mes Linux en Polyn?sie fran?aise http://www.sysnux.pf/ T?l: +689 483 527 / GSM: +689 797 527 -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: cs60usb.txt Url: http://driverdev.linuxdriverproject.org/pipermail/devel/attachments/20071124/2e560736/attachment.txt