The MP1590B Network Performance Tester can be used to make performance tests and jitter measurements of previous PDH, DSn, SDH/SONET, and OTN-related equipment and devices as well as OTN, EoS, virtual concatenation, and LCAS measurements of socalled next-generation networks. It uses the Ethernet plug-in modules from the Anritsu MD1230 IP Tester series to provide a singlecabinet measurement solution for IP networks. Furthermore, when used by combining the built-in differential electrical interface and the Jitter Measurement Unit, it offers an accurate jitter measurement solution for optical modules, such as XFP. Depending on the plug-in unit combination, the MP1590B offers OTN, SDH/SONET, EoS, jitter, Ethernet, etc., measurements for converged next-generation networks.