Yeah, I think I know what you mean. It is in the synaptic package manager for Mint Cinnamon, but I could not find it anywhere for Slackware. I thought that I would find the source code, and package it up, but ran into the same problems that you did with a Google search. Try svxlink. It mentions Q-TEL there but I was unable to find what I needed to make a package for Slack. Of course, it didn't help that the bloody phone rang off the hook every five minutes with some stupid telemarketer while I was searching. Oh, well, back to the drawing board.
Happy Trails
Paul