To provide more context, Alcatel-Lucent was a merger of the French Alcatel and Lucent. And Lucent was formed when AT&T divested technology business units including Western Electric and Bell Labs.
To go further, in the 1920s, AT&T[0] was required to divest its international operations, which were sold to newly-formed ITT. Much of those assets eventually went to Alcatel.
[0] the original pre-1984 AT&T, not Southwestern Bell d/b/a AT&T
[0] the original pre-1984 AT&T, not Southwestern Bell d/b/a AT&T