AT&T (6:21-cv-00088), Charter Communications (6:21-cv-00089), Crown Castle (6:21-cv-00090), Deutsche Telekom (T-Mobile) (6:21-cv-00092), DISH Network (6:21-cv-00093), and Windstream (6:21-cv-00088) have been sued in the Optic153 LLC campaign, each accused of infringing six optical networking patents through the provision of optical amplification in their various networks and systems. Each complaint identifies equipment within those networks provided by Cisco, with the pleadings against AT&T and Windstream also calling out Fujitsu devices—all without naming Cisco or Fujitsu as a defendant.