MORRISTOWN, NJ, USA – May 2, 2011 –TE SubCom (SubCom), an industry pioneer in undersea communications technology, today announced it has successfully completed testing of its new 4-port branching unit, making it the first undersea communications supplier to offer the solution and paving the way for the deployment of multilayered undersea telecommunication networks. An upgrade from the standard 3-port branching unit (BU), the 4-port BU is capable of handling three separate power paths and enables alternative powering configurations.