Very powerful loopback modules. These modules came in time with a secure package. I have used them in testing 40G QSFP ports on my cisco switches and I admit it is a great way to test QSFP connectivity on cisco switches. I’m quite satisfied with them.

I’d like to give these loopback modules five stars because they really bring me a very good user experience. If I have other needs, I will still choose FS. They do a good job.

The items I ordered arrived very quickly and work perfectly. I will be using Fiberstore as my primary fiber network resource from now on.

All I can say is that all these QSFP+ loopback modules are absolutely well made. If you are in need of them, do not hesitate to buy them.

The online ordering was quick and efficient, so too was the delivery. Great prices—will definitely be using them again.

The goods were requested by a particular business unit that I used to work for. Another order was placed but the detaild weren't updated. You should pay more attention to order detail.