No, QSFP+ transceivers are not compatible with QSFP28 transceivers. QSFP+ transceivers support data rates of up to 40Gbps, while QSFP28 transceivers support data rates of up to 100Gbps. Additionally, QSFP+ transceivers have a different form factor and electrical interface compared to QSFP28 transceivers, so they are not interchangeable.

What is the difference between QSFP+ and QSFP28?

What is the QSFP+ Transceiver?

QSFP+, commonly called QSFP, is an abbreviation for Quad (4 lanes) Small Form-Factor Pluggable. QSFP+ optics are another miniature hot-swappable transceiver for data transmission. Compared to SFP+, QSFP+ supports 4x10G or 4x14G SFP+ data rate for higher bandwidth capability. It offers multiple data rate options for Ethernet, Fiber Channel, InfiniBand, and SONET/SDH technologies.

40G QSFP+

What is the QSFP28 Transceiver?

QSFP28 is an abbreviation for Quad Small Form-Factor Pluggable 28. QSFP28 transceivers are suitable for 100 Gigabit Ethernet, EDR InfiniBand, or 32G Fiber Channel networks. The QSFP28 100G transceiver features four high-speed differential signaling lanes with data rates ranging from 25 Gbps to 40 Gbps. In the 100G optical market, QSFP28 transceivers are more popular than CFP, CFP2, and CFP4 form factors.

100G QSFP28

comparisons in SFP vs SFP+ vs SFP28 vs QSFP+ vs QSFP28

After figuring out what SFP/SFP+/SFP28/QSFP+/QSFP28 are, the following part will give detailed comparisons of SFP vs SFP+, SFP28 vs SFP+, QSFP vs QSFP28 and SFP28 vs QSFP28.