Cisco GLC-SX-MMD Compatible 1000BASE-SX SFP 850nm 550m DOM LC MMF Industrial Transceiver Module

The product description said there was a lot of stock, but after placing the order, I found out there wasn’t as much available, and some items needed to be restocked. It caused me some inconvenience. The customer service said the website isn't able to show real-time inventory for delays, which seems like something they could improve.

A seemingly simple device that performs an impressive function. For the user, it's effortless—just insert the fiber, plug it into the switch, and you're all set.

What I can make sure is this module is accepted by Cisco 9300. If you have the same switch as me, you can go with confidence.

These modules arrived on the forth day I placed the order with a decent package. It has already been tested on the Cisco devices, no issue so far.

I noticed it while searching on Google Shopping. Compared to similar products, its price and quality seemed quite good. I've already tested it on my Cisco switch for 1G access, and it worked without any issues.

Purchased a large quantity of 1G SFP modules, apart from the impressive quality of the product itself, the quality of QSFPTEK's customer service is also worth mentioning, Rachel has always been very helpful and patient in responding to the questions I've asked.