Oh. USB or something else - the specific model number would be helpful.
There is this, for USB:
**The Linux operating system is not officially supported by our chipset manufacturer,
or Tigertronics. We will do our best to help you get your SignaLink working in
Linux if you call for Tech Support (click for some customer provided information
on running the SignaLink USB in Linux), but please understand that we do not run this
OS ourselves so support for it will be very limited. If you are not familiar with
installing and configuring software/hardware in Linux, then we strongly suggest
that you use a different OS with your SignaLink.
You are going to need to identify how the sound card shows up in /dev/
I can't tell how PTT shows up in their serial port mapping, either.
