Cisco QSFP-100G-LR4-S Compatible 100GBASE-LR4 QSFP28 1310nm 10km Optical Transceiver Module

This item extended my network 100Gb link to 100km reach, which fits well in the long-haul point-to-point applications. Now two buildings 100g and 25g speed are stable. I will update my comments if any issues happens.

I purchased it from qt last year. I came back to give you real feedback. As you can see, they are still developing, the website but also the business. However, they are quite sincere compared to other third-party vendors I have talked to. Full testing process and kind customer support.

Purchased a couple of these QSFP28 modules for my Arista 7060X for testing. One month passed. They work great, with no issues. Most importantly, price is the best I found.

We originally planned to build a DWDM solution to connect the server equipment in the two buildings. QSFPTEK's technology provides a lower cost 100G-ER4 solution that meets our needs. ER4 of 2pcs provides simple and effective connection and has been running stably for half a year now. Thanks wendy for supporting us.

I am their old friend, this time I ordered 20pcs QSFP28-100G-ZR4 modules. I asked talia for a test report and they got back to me quickly with relevant data. Now my clients are using these modules and have found no issues. QSFPTEK is a trusted partner.

I purchased 10 100GBASE-LR4 modules to adapt to my Cisco NEXUS 9300 switches and I have been using them for almost a month now and they have been working very well. By the way, I hope my next delivery will be faster.

Fast shipping from QSFPTEK's warehouse in Poland shaves off a lot of time costs for us and we have more time to set up our data center. It makes our purchasing process very easy and we always get our products quickly every time!

I need 2pcs 100G optics for the uplink of my core switches recently. After comparison online, I found that they can provide the product with lower price than other suppliers, the evaluation seems to be good. Also provide the life warranty, any quality problems can provide free of charge replacement according to their Returns Service.

I placed an order of Arista QSFP-100G transceivers as my customer’s request. Then my customer told me he wanna change them with this type. I contacted my Account Manager - fannie. She helped to cancel the order of wrong items and sent me a link for payment of new items soon. And then the refund was returned to my Paypal account quickly. Very appreciated.

The price offer in their ads caught my attention, very attractive compared with other vendors. At the beginning I was concerned about the quality, so I only bought one item. After testing it, it really worked well.