AT&T bill service to slash ISDN costs

AT&T CORP.'s large customers can expect to save, on average, up to 30% on ISDN costs with a new service that allows users to roll ISDN charges onto telephone bills.

Traditionally, AT&T users have been billed separately for Integrated Services Digital Network (ISDN) and Software-Defined Networks, which link telephone systems at multiple corporate sites sharing a private phone network.

With the new offering, all calls can be managed on one platform using the company's switch monitoring tools, and contracts can be negotiated to include...