Bought this product for deploying a DWDM network. The insertion loss is low indeed. Very efficient transmission and saved us a great bunch of fibers. We'd like to give five stars.

We turned to FS for a basic point to point DWDM build using the 40ch mux/demux. They quickly replied with a solution to transmit business by the way of dual-fiber bi-directional, which is said to achieve 400G business transmission. Finally got 80 10G DWDM SFP+ and 2 40 Channels C21-C60 dual fiber DWDM Mux Demux, deployed in accordance with the instruction. Now things go well. We’ll come back when looking for advice on what to order.

I purchased these for accomdating several FMU plug-in modules. This is not my first purchase of this case. Nothing special to mention about it. It is just good quality at a fairly price. For a value 1U case, it does its job. The screws that came with are solid and abundant. I only load them with FS self-designed plug-in modules which all fit in it well. Be sure you pay attention to the product description if you try to insert other components.

Use the mux to run multiple 10G DWDM waves in our telecom room. We also bought some compatible Cisco 10G modules, then connected the mux to our Cisco switch. Packets run smoothly.

We are going to buy some DWDM products for our metro network project, including DWDM mux/demux, OADM, transceivers(which must be Fibre Channel DWDM SFP+), and some other components like switches, fiber cables, chassis, etc. This is a huge and essential project, so we want to make sure everything about the product and quantity will be right. We asked for help from the FS tech group. They gave me very detailed and professional suggestions. Any question they would be patient to explain. They also made a solution and clear product lists. They advised me to choose this regular 19” 40CH mux/demux with insertion loss lower than 5dB. And it can still work even when power is off. With O16/G26 EDFA, OADM, this long-distance DWDM transmission network would work well. You guys did a great job. Save us budget. We are considering to come back again in the future.

We considered buying a DWDM mux and wondered if the 1310nm port could use with our 40G transceiver. On the website a Q&A answered that the 1310nm Port Pass Band Width is 1260nm-1360nm. Then we bought this mux with no more questions. Product is easy to use as well.

I planned to deploy a 10G DWDM link with passive devices. According to my needs, I made a product list for this link on my own but didn’t know if they were right. So I consulted my account manager to confirm. They helped me revise my solution and pointed out the problem of that original solution. Their advice was very professional and constructive, which helped me avoid unnecessary trouble and additional cost.

I had bought two FMU-C182761M in FS for my site to site dark fiber network before, the products work well. This time I planned to insert an add/drop module in the middle of the network. According to my current network, my account manager suggested me to use the dual fiber cwdm oadm matching with this rack chassis. Having used a while, this fmu chassis is indeed useful for saving rack space and managing modules.

I had a 17km link. I want to apply your 8-channel DWDM MUX on Site A, and using the same MUX on Site B. However, I was not sure about the attenuation, and I was afraid that this would damage our transceivers as I have other links. Then I consulted with the Account Manager, she advised me to deploy #50117 on Site A and #50116 on Site B, and helped me to calculate the expected attenuation. You do have a professional team that solves our problems effectively.

I've bought some transceivers here before, high performance and no compatibility issues. So I placed my order for some DWDM SFP+ transceivers, DWDM MUX/DEMUXes this time without hesitation. In order to expand our network, we deploy this 40 channel DWDM MUX/DEMUX system to achieve 400G in our data center. FYI, the distance is roughly 40 km, and we don't need to add additional devices. Fiber-saving and cost-saving, perfectly meet the infrastructure requirements of our network. I've recommended FS to my friends in the IT field already. I believe words will spread through them as well.