Notes on how a buying team writes a 1G SFP brief. They are checklists, not a catalog and not a factory endorsement.
2026-11-12
A procurement perspective on buying 1G SFP, CWDM SFP, and 80km SFP modules. Three sourcing scenarios (small restocks, project-specific wavelength orders, bulk quarterly contracts), what works in each, and the honest limits of each approach.
2026-11-12
A procurement lead shares the March 2022 order that went sideways—200 units of 1G SFP modules, a 22% discount, and a six-week burn-in that revealed what 'cheap' actually costs. Includes the 5-point checklist that came out of it and why wholesale CWDM sourcing looks different today than it did five years ago.
A note can show the arithmetic a buyer might run: fiber loss near 0.22 dB/km, a commercial temperature window of 0 °C to 70 °C, or the five DOM readings associated with SFF-8472 style monitoring. It cannot show that a named host accepted a named EEPROM. That result needs the platform, the software release, and a document from the supplier who will ship the part.
Keep 850 nm multimode, 1310 nm single-mode, 1550 nm long-reach, and CWDM channels in separate sentences when you take notes for a live order. A single paragraph that says “1G SFP” loses the plant. If the span is an 80 km class, copy minimum transmit power and receiver sensitivity before you copy a unit figure. If the mux is CWDM, copy the nanometer and the 20 nm grid slot.
Currency and quantity unit belong in the same note as the optic. Per module and whole order are different bases. Freight and EEPROM coding fees are easy to drop when the conversation moves quickly. Write them down even when the amount is still unknown. Then use the RFQ form so the factories see the same packet the note described.
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