AT&T Co has announced the first two Intergrated Services Digital Networking applications to be offered over the public telephone network in the US. Available in 18 cities in three months, 88 cities in 1989, the Call-by-Call Service Selection, at $450, enables users to switch channels on the fly on high-speed leased lines, and the Info-2 service, $200 and 3 cents per number, enables the user to see the number of the calling party before picking up the phone. The charges are on top of an initial $300 and $400 a month to subscribe for ISDN service, which also needs an ISDN PABX. Upgrading AT&T’s System 85 is 5% to 10% of the initial cost of the box.
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