By Edward J. Callahan, Jr., American Television and Communications Corp. & William J. Deerhake, International Business Machines Corp.
An experimental wideband data communications network has been installed at IBM's Systems Communications Division facility at Research Triangle Park (RTP), N.C. The network connects display terminals and other devices with a central computing facility. The network is a dual cable, full duplex, 5-30 MHz and 50-300 MHz system.
Connection of terminals to two other IBM locations in Raleigh, N.C., about 22 land miles from RTP, is also provided. These signals are transmitted from RTP to American Television and Communications' (ATC) microwave tower in Durham, via ATC's Durham cable system.
Then the signals are carried by a one-hop ATC common carrier microwave system to ATC's Raleigh tower. And then, via ATC's Raleigh cable system, the signals are carried to the IBM Raleigh facilities.