Advanced Repeater Systems has a USB device for both Echolink and Allstar. (They are nicely refined versions of the USB Sound FOB modification instructions you find for AllStar.) Echolink interface: http://www.arsrepeaters.com/EchoLink_Interfaces.php (won't work with AllStar. It uses a CM118 chip, but not the right one. I have one, and trying to use any of the usb radio to include chan_alsaradio causes problems -- it comes up as C-Media Headphone Set and doesn't have all the sound channels/controls a normal CM108 USB Sound FOB does ). I have opened the case on mine, it is basically a USB Sound FOB modified and mated with their radio interface board. AllStar adapters : http://www.arsrepeaters.com/USB_AllStar_Adapters.php (will probably work with Echolink too. Same design as the Echolink, says it uses an actual CM108 chipset in it.) And there is a version for WinLink too. Schematics are available on the site if you have the desire and skill to make your own (or you can get the universal one that doesn't have the interface cable included). . They also have serial versions (I built my own based off their design schematics on the page). -Stacy KG7QIN