Ron has a home studio, and his ISDN line costs have skyrocketed lately. Leo says that's because the phone company is trying to get ISDN users to give their lines up. The phone company has to operate a non-standard switch in order to maintain the ISDN line. They don't want to have a separate switch anymore and they want to stop providing it.
Justin streams music in real time to radio stations, but it gets problematic. Leo says that the Internet was never designed for streaming music because packets are designed to arrive out of order and be reassembled. Leo uses an ISDN, which isn't super fast, but they are point to point so it's a direct connection. This means he has consistent bandwidth that delivers packets almost instantaneously. Anything in real time can't really be used over the internet. It's too difficult. Telos makes boxes designed to do internet protocol, but Leo isn't convinced it's ready for prime time.