. . . . "AT&T Long Lines" . "Communications" . . . "AT&T Communications" . . . . . . . . . . . . . "2017-08-01" . . . . . . . "long-distance division" . . . "AT&T" . "its communications unit" . . . . . . . . . . "its communications division" . . . . "AT&T Communications" . . . . . "2017" . . . . . "AT&T network lines" . . "1.44E11" .