FXS hiddev communication

Hi All,

I’m wanting to implement software under linux to work with tjnet.com/solutions/usb_to_rj11_adaptor.htm which registers itself as a hiddev. There are schematics for the device on that site.

I was wondering what it is that defines how I need to communicate with the device. I’ve read the hiddev info from frogmouth.net/hid-doco/linux-hid.html but as far as the low-level communication - is that specified by the SLIC chip? the USB controller? How would I go about finding out what to send back and forth through the hiddev driver? If it’s a matter of listening to other software which has it working, what could I use under windows to listen to this and analyse it?

Thanks for any help.