Transceiver families
SFP is a common compact form factor. SFP+ is widely used for 10GbE, SFP28 for 25GbE, and QSFP families provide multiple lanes for higher speeds. Form factor alone does not define reach.
Fibre types
Multimode is common for shorter data-centre and campus links. Single-mode is used for longer campus, metro and carrier links. Match the optic to the fibre plant and wavelength.
SR, LR and ER
SR, LR and ER describe broad reach classes. 10GBASE-SR is a short-reach multimode example; 10GBASE-LR is a single-mode long-reach example. Always check the specific transceiver specification.
Link budgets
Fibre attenuation, connector insertion loss and splice loss consume the available optical budget. The receiver must still receive sufficient power above its sensitivity threshold with suitable engineering margin.
Compatibility
- Confirm Ethernet standard and line rate.
- Confirm wavelength and fibre type.
- Check connector and polarity.
- Check supported distance and optical budget.
- Confirm switch support and optic coding.
- For BiDi optics, confirm the paired wavelengths.
Troubleshooting
- Check optic type and DOM values.
- Inspect and clean fibre ends.
- Confirm polarity.
- Check fibre type against the optic.
- Measure optical power where possible.
- Swap one component at a time.
- Check interface errors and link flaps.
Related tools
Choose connectivity options and check 10GbE distance limits.