There are three main QSFP28 transceivers for short-distance, which are designed for the reach distance in hundreds meters, QSFP-100G-SR4, QSFP-100G-eSR4, and QSFP28-100G-SWDM4. The 100G QSFP28 SR4 is the most commonly used models, in telecom and datacom application, and some scenarios will request the OTU4 model. The 100G QSFP28 SWDM4 are well known cause of the optical interface is duplex LC connector, when in deployment, it is convenient and smooth upgrade from duplex LC cable structure, it is the special application in finance industry and the government organization.

Below the comparison of these 3 items, summarize the main knowledge you need understand when choose the 100G SR transceivers.

Table1, Comparison of 100G QSFP28 SR4 eSR4 and SWDM4

FAQ;

Q: I had the QSFP28-100G-SWDM4 used in my network, can I replace it with SR4 or eSR4?

A: If you can change the distribution cable, from existing duplex LC to MPO, then you can use anyone of SR4 and eSR4.

Q: I had the QSFP-100G-SR4 used in my network, can I replace it with QSFP-100G-eSR4?

A: yes, you can.

For more information, visit Etern Optoelectronics Website: https://www.szetern.com, or email to: sales@szetern.com