Wenham, Mass.--Agere Systems, a microelectronics spin-off of Lucent Technologies Inc., on Monday breaks a print, broadcast and outdoor advertising campaign created by Mullen Advertising Inc. The tagline for the $20 million to $25 million campaign is "How communications happens." Print ads are running in Business Week, The Wall Street Journal and other business publications. Print and TV campaigns are also running in Europe and Asia. "Agere is solely focused on the communications sector," said Sue Sienko, Agere's director of advertising and brand management.