600 CONVERSATIONS AT A TIME
CD 2055059 E&MP5.027
May 28 1949
Cross section of an 8-tube coaxial cable.
Each tube is capable of transmitting 600 conversations simultaneously or one television program.
(As each coaxial only transmits in one direction, two tubes are needed for a telephone conversation.)
Original Caption by Science Service
©American Telegraph & Telephone Company (AT&T)