Hello Shaid,As Alisthu said your system file is correct,you can now increase the users if you want.2.5Gbps is not a issue with this system.However for the more practical signal you can use a WDm multiplexer rather than the ideal one.You can set the extinction ratio of the CW transmitter to 30 as EML.ER 10 refers to DML direct modulatated laser.Same advice for the lazers for upstream also.