Have tried some FS optics and all of them worked well. Our previous suppliers could not provide full range of transceiver modules. Purchasing separately feels troublesome. Major needs are 40/100G optics. The QSFP28 100G SR4 deflects our attention to FS and it is their full product portfolio, excellent service and quality that make us decide to settle with them. Different laser types and packaging techniques are all needed. It’s worthwhile to get an FS box to do troubleshoot and tune wavelength for us and wholesale buyers. Reprogramming is not unusual and can be done quicker than have it done by others. Version 2 of FS coding box has more functions than the first generation, now is a necessity to take to shuttle in the data centers for our engineers. We are very optimistic about FS.

Want to find transceiver modules for Juniper MX960 and QFX5200. They recommended this 100G-QSFP28 and customized to make it work. Good value as before and haven’t charged me an arm and a leg. Never let me down.

Double checked before adding to my cart that they meet the associated industry standard specifications. The interoperation with my Cisco 100G transceivers again proves its capability. Fast shipping from Delaware warehouse. Love them.

Got a batch of 100GBASE-SR4 QSFP28 transceivers without coding this time, the FS box V1 we applied last year is still in use. Code the optics standby with FS box accordingly, we really appreciate the flexibility as an ISP in particular. FS is the first choice that we consider when purchasing network devices. It is cost-effective and delivers faster than any other suppliers that we have dealt with. This is paramount for us as we need to provide full set of solutions for our clients, anything absent is untolerable. Their quick response contributes to our high efficiency. Fiber cables, optics, DACs, everything works great so far. I personally have introduced many around us to buy parts from FS, so much so that all suspect me as a salesperson from FS. In fact I may truly have the talent to do that, lol.

These modules came nicely packaged and worked right out of the box, just plug and play. I'm using them successfully in my Juniper MX 204 switch, and trunk the switch and a dell switch with no issues whatsoever. Don't seem to get hot or anything like that. Using these on my units is just like I did some Juniper modules. Worked flawlessly as we would expect, no packet errors or interface issues. Made a nice difference to my network. I would buy again in an instant.

I get the product very fast and it connects well.

Tiene la tasa de transmisión de datos de hasta 100 Gbps, contando con un rendimiento óptimo.

It matches well with my device. And the customer service reply to my question fast. I get the product quickly.

En realidad, lo descubrí FS por casualidad. Si mal no me recuerdo, lo encontré en Twitter, un texto sobre QSFP28 100GBASE-SR4, me traía por su bajo precio, me preocupaba mucho por su cantidad antes de comprar los productos. Entonces, leía los comentarios, generalmente no hay males comentarios. Por fin, me decidí a comprarlo, no cabe duda de que el transceptor es excelente.

Due to an urgent project, we needed 30pcs QSFP28 SR4 soon. Then I placed an order and the website showed it would be shipped from Seattle directly. I ordered F5 compatible parts, but I received Cisco parts. They explained the Cisco parts could replace the F5 parts. But based on the feedback from our engineers, we've met big problems when we connected Cisco parts with Juniper parts together before. It's an important project and we couldn't take the risk. So we required a replacement and they did a fast shipment. I love their service!