Intellectual property related to this product and registered to AT&T Corporation has been
transferred to Lucent Technologies Incorporated.
Any references within this text to American Telephone and Telegraph Corporation or AT&T
should be interpreted as references to Lucent Technologies Incorporated. The exception is
cross references to books published prior to December 31, 1996, which retain their original
AT&T titles.
Lucent Technologies – formed as a result of AT&T’s planned restructuring – designs,
builds, and delivers a wide range of public and private networks, communication systems
and software, consumer and business telephone systems, and microelectronic components.
The world-renowned Bell Laboratories is the research and development arm for the
company.