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100G and 200G Optical Transceivers

100G and 200G Optical Transceivers

Use this series page to compare form factors, link reaches and interface directions before selecting a specific model. Final specifications, compatibility coding and delivery options remain tied to the ordered P/N and target host.

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Key specifications

Typical reach
100m / 500m / 2km / 10km / 40km
Reference standards
IEEE 802.3ba / IEEE 802.3bm / IEEE 802.3cu / IEEE 802.3bs / IEEE 802.3cn / QSFP MSA

100G products

100G QSFP28 SR4 100G QSFP28 CWDM4 100G QSFP28 LR4 100G QSFP28 ER4 100G QSFP28 PSM4 100G QSFP28 DR1 100G QSFP28 FR1 100G QSFP28 LR1 100G QSFP28 AOC 100G QSFP28 DAC 100G QSFP28 to 4xSFP28 Breakout AOC 100G QSFP28 to 4xSFP28 Breakout DAC

200G products

200G QSFP56 FR4 200G QSFP56 SR4 200G QSFP-DD LR4 200G QSFP-DD ER4 200G QSFP56 AOC 200G QSFP56 DAC 200G QSFP56 to 4xSFP56 Breakout DAC 200G QSFP-DD to 2xQSFP28 Breakout DAC

Applications

Server and ToR accessLeaf-Spine linksAggregation uplinksNetwork upgrades

Related applications and solutions

100G QSFP28 reach selection → Compare SR4, PSM4, CWDM4, LR4, fiber, and connector conditions Optical link budget calculation → Break down fiber, connector, margin and receiver windows Optical transceiver procurement checklist → Prepare 100G/200G host, FEC and sample fields Optical transceiver link troubleshooting → Diagnose link-down, FEC errors, flap, and breakout failures Data center networking → Compare server access, aggregation, and upgrade paths High-speed optical interconnect → Select modules by port, reach, and medium

Frequently asked questions

Which 100G PMD matches my distance and fiber?

The listed range spans 100m to 40km. In practice: SR4 over multimode MPO for in-row links, PSM4 over parallel single-mode for around 500m, CWDM4 over duplex single-mode for about 2km, LR4 for 10km and ER4 for 40km. Start from the fiber and connector already installed, then confirm the loss budget.

Is 200G QSFP56 compatible with a 100G QSFP28 port?

No. QSFP56 uses PAM4 electrical lanes while QSFP28 uses NRZ, so the electrical interface differs even though the cages look alike. Some platforms allow a QSFP28 module in a QSFP56 port but not the reverse; treat this as a per-platform question and confirm the supported port modes.

Can a 100G port break out to 4x25G?

Only over a parallel PMD with the source port configured for 4x25G breakout, and only if all four branch ports support 25G. FEC mode and software version also have to be confirmed on the target platform, because a 25G branch may require FEC that the host is not configured to enable.