Hummingbird Networks Brand Compatible for Cisco Meraki SFP 1G LX10 Single-Mode Module MA-SFP-1GB-LX10

I received the original units and found that they did not work properly with our switches. I contacted Hummingbird Networks. They began troubleshooting on their end, and within 24 hours got back to me that there was a firmware problem with the units they had sent out. They sent out replacements immediately, and I had them within a few days. The replacements worked perfectly, and they told me to keep the originals.Took off one star for not working in the first place, but overall, their customer service was fantastic. Would definitely purchase from them again.