{"id":937,"date":"2021-06-22T03:46:34","date_gmt":"2021-06-22T03:46:34","guid":{"rendered":"https:\/\/www.fibermall.com\/?p=937"},"modified":"2025-06-03T07:39:15","modified_gmt":"2025-06-03T07:39:15","slug":"how-to-choose-100g-qsfp28-optical-module","status":"publish","type":"post","link":"https:\/\/www.fibermall.com\/blog\/100g-qsfp28-transceivers.htm","title":{"rendered":"24 types of 100G QSFP28 transceivers overview"},"content":{"rendered":"

With the development of 100G Ethernet, the demand for 100G optical modules is increasing. Nowadays, 100G optical modules account for a significant portion of network construction costs. Among them, QSFP28 has become the preferred form factor for 100G optical modules due to its small size and low power consumption. 100G QSFP28 optical modules are available in a wide variety of types and are usually used in data centers, and each one has its own characteristics, so you can choose the right one according to your actual needs.<\/span><\/p>\n

The standards of the 100G QSFP28 optical module are defined by two main organizations (IEEE and MSA). IEEE defines the standards of QSFP28 SR4, QSFP28 SR BD, QSFP28 SWDM4, QSFP28 LR4, QSFP28 CWDM, QSFP28 DWDM, QSFP28 ER4, and QSFP28 ZR4. MSA defines the standards of QSFP28 CWDM4 and QSFP28 PSM4.<\/p>\n

In detail, \u201cQSFP\u201d is short for Quad (4-channel) Small Form Factor Pluggable, which refers to the package type; the number \u201c28\u201d indicates that the maximum transmission rate of each channel is 28Gbps; \u201cSR\u201d means short range (up to 100m); \u201cLR\u201d means long range (up to 20km); \u201cER\u201d means extended range (up to 40km); \u201cZR\u201d means ze best range (up to 80km); and the number \u201c4\u201d in QSFP28 CWDM4 and QSFP28 PSM4 both indicate that the module has 4 channels, we will discuss their difference later.<\/span><\/p>\n

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