Sycamore Networks announced that its SN 9000 Intelligent Multiservice Switch has successfully completed interoperability testing with the U.S. Defense Information Systems Agency (DISA) Joint Interoperability Test Command (JITC). JITC assessment and approval is required for systems intended to participate in Department of Defense networks. The SN 9000 integrates multiple functions in a single, highly-compact system that can include low-order (VT/VC) and high-order (OC-n/STM-n) switching, add-drop multiplexing, advanced Ethernet services and integrated optical transport, according to the company.