The solution includes two hot-pluggable optical transceivers. The 100G CFP2 ER4 module is used for metro long-haul optical transport network, while the 100G QSFP28 4WDM-40 module is used for long-haul data center interconnection.
It is an indisputable fact that ROADM is useless. Before the 5G is about to start, people are advised not to mention or pick up this expensive and useless network weapon. The Working Principle of ROADM The working principle of ROADM is shown in the following figure. A, B and C are three station in a WDM system, of which A and C are Optical Terminal Multiplexing (OTM) stations and B is the ROADM station. The service delivered by station A is carried on the wavelengths of λ1 to λ5, where the wavelengths are like the train carriages, and the service is the goods in the carriages. In station B, wavelengths of λ3 and λ5 are downstream, while wavelengths of λ6 and λ9 carry new service upstream, thus realizing directly pass wavelengths (λ1, λ2, λ4), downstream wavelengths (λ3, λ5) and upstream wavelengths (λ6, λ9) at station B. If it is necessary to change the up-down and pass wavelength of B station, it only needs to be configurated by software, and there is no need to make any changes in hardware….