Transceivers
Transceivers covers the optics that plug into switch, router and adapter ports: 1Gb SFP modules like 1000BASE-SX, 10Gb SFP+ SR and LR optics from Finisar and Arista, 40Gb QSFP+ SR4 modules from Avago, and TAA-compliant compatible optics from Accortec coded for major switch brands. A transceiver has to match the port type, the link speed, the fiber (multi-mode or single-mode), the wavelength and the reach, and on many switches, the vendor coding too.
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Transceivers: 8,792 products
Buying guide
Matching a transceiver
Port and speed
SFP is 1Gb, SFP+ 10Gb, SFP28 25Gb, QSFP+ 40Gb and QSFP28 100Gb. Many SFP+ ports also run 1Gb SFPs, but not every switch supports it.
Fiber and reach
SR optics use multi-mode fiber at 850nm for short runs; LR optics use single-mode fiber at 1310nm for distances up to 10km. Both ends must match.
Connectors
Most SFP and SFP+ optics use duplex LC connectors. 40Gb SR4 optics use MPO-12 trunks, which need MPO cabling or breakout cables.
Vendor coding
Some switches refuse optics not coded for that brand. Compatible optics coded for your platform avoid the warning or shutdown.
Transceivers
Frequently asked questions
Can I use an SFP+ module in an SFP port?
No. An SFP port runs at 1Gb and can't drive a 10Gb SFP+ module. The reverse often works: many SFP+ ports accept 1Gb SFPs.
What's the difference between SR and LR optics?
SR (short reach) modules use multi-mode fiber for runs of a few hundred meters. LR (long reach) modules use single-mode fiber for runs up to about 10km.
What does TAA-compliant mean for a transceiver?
The module is made or substantially transformed in a country the Trade Agreements Act allows, which US federal buyers often require.
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