Cisco SFP-25G-SR-S Compatible 25GBASE-SR SFP28 850nm 100m LC DDM MMF Optical Transceiver Module

Great price, excellent product quality, and the account manager is quick to respond and very professional.

This 25G SR module lights up green as soon as it is inserted into the device. It responds quickly, transmits stably, and the customer manager service is also very good.

After purchasing this QSFPTEK optical module, I did a comparison test with my current lab module, and many of the parameters are equally good and exactly as advertised on the website, so if you need to choose a suitable and reliable optical module for your critical applications, then this product would be a good one!

Using these 25G optical modules for long-distance fiber connections, and they've been great. The signal clarity is excellent, and the modules keep the connection stable even over several kilometers.

Exactly what I was hoping for! Nicely packaged, quick delivery, and the item works perfectly. Great job!

After learning about my setup, the sales support team recommended these 25G SR modules and jumpers. I ended up buying six of them. Just got them, and so far, so good! I’ll leave feedback later if any issues come up.

Wendy answered many of my questions and was always very responsive whenever I emailed her. I asked about the specs of the product and she sent me a complete spec report that was identical to what was shown on the website.

I bought three compatible modules from Cisco, Juniper and Arista. The delivery speed was very fast and the account manager also gave me feedback on the logistics information in time. It is plug-and-play, compatible and stable, and the transmission is also very stable, and it can achieve the expected transmission rate, which is great.

This 25 SR optical module is good quality to use, I receive it only in three days, amazing shopping experience!

The express was very fast and it was delivered to my address in three days. The product was well packaged so I didn't have to worry about it being damaged during transportation. It was plug and play, no additional configuration required, and overall it was a good shopping experience.