Clarifying the details of AT&T Co’s Personal Video System Model 70 Windows-based teleconferencing system (CI No 2,034), the system transmits information over standard digital phone lines using the Px64 international video standard at a rate of 10 to 15 frames per second, and the $7,000 price requires you to bring your own computer; the control unit, to be available in the US in the fourth quarter of this year for between $60,000 and $200,000 will enable up to 24 users to be linked in a video conference.