Teleconference Systems LLC, a subsidiary of publicly traded NPE Acacia Research Corporation, has kept its long-running videoconferencing campaign alive with a new lawsuit against Oracle (2:19-cv-00308) in the Eastern District of Texas. The plaintiff accuses Oracle of infringement through the provision of certain session border controllers, including its Acme Packet 3820/4500/4600/6100/6300/6350 Service Provider Platforms, the Oracle Unified Session Manager, and the Oracle Mobile Security Gateway. Teleconference Systems—as their exclusive licensee—asserts five patents from a family of six, omitting only the earliest member, which the NPE asserted against a slew of Cisco’s TelePresence customers to kick off this campaign back in 2009.