I had one of these on the line at my mothers. Wonderfully stupid.
Create a random telephone router application that you can connect salespersons to from all over the world.
When someone call you, like the cases mentioned in this thread, you simply press the "Random Terror Button" and the call is forwarded to a pool from where it's matched to another salesperson. They have a wonderful time with each other and you have an even more wonderful time listening to their, hopefully extremely confused attempt to understand what's going on. Off course the option to record any such conversation is built-in. And we'll have channels streaming this madness 24/7.