
Optical Transceiver FAQ 2026: Choose 155M–2.67G BiDi SFP Modules for Single-Fiber Links in Southeast Asia
One spare single-mode fibre can save a civil-works job. That is the practical case for BiDi SFP optical transceivers in Southeast Asia, where riser pathways, duct space and leased dark fibre are often more expensive or harder to obtain than the active hardware. A 155M–2.67G module is not a generic plug-in, though. The wrong wavelength mate will leave a perfectly clean fibre link dark.








