We're part of Telos, so as you might imagine, we've studied mix-minus for a long time. And we've always been amazed at how complicated and confusing it is to set up correctly. With today's radio shows relying heavily on phones and remotes, something needed to be done. Our consoles generate mix-minuses automatically, on-the-fly, without any intervention needed from talent. The way it works is simple: when a caller is on the air, he hears the main Program feed, minus himself. When off the air, he hears a special "off-line" phone mix that can contain audio sources: pre-fader audio from the host mic, other phone callers, etc. Best of all, mix-minus settings for audio sources such as phone hybrids and remote codecs are assigned to the source itself, not the console fader — so when a source that needs a mix-minus is loaded onto any fader, on any console, the mix-minus settings are automatically loaded too. At the physical level, mix-minus is easy, too. Livewire carries audio in both directions, so one RJ-45 covers everything.