LONG-REACH CLASS · FACTORY PACKET
An sfp module 80km factory quotation is a link-budget class, not a promise that 80 km of your fiber will close. LinkScope Sourcing 02 asks factories to answer the same optical rows. The desk does not own a laser line and does not certify a span.
At about 0.22 dB/km, 80 km of G.652 fiber is about 17.6 dB before connectors, splices, and margin. Chromatic dispersion near 17 ps/nm/km times 80 km is about 1360 ps/nm. Those two numbers are buyer arithmetic. They are not a datasheet for a module this desk has not seen.
Ask for minimum transmit power and receiver sensitivity, often an APD receiver on this reach class, plus the overload point. A budget of 23 dB does not survive 17.6 dB of fiber plus 2 dB of connectors and 3 dB of margin unless the datasheet actually shows that margin.
Confirm 1550 nm rather than a 1310 nm 10 km part that was relabeled. LC duplex is the usual cage exit. State polish if the plant specification names it. Return loss belongs on any jumper the quote includes.
A roadside cabinet at −40 °C to 85 °C is an industrial window. A 0 °C to 70 °C commercial part is a different offer. Ask for maximum power in watts, because a long-reach laser can run hotter than a short-reach 850 nm part in the same cage.
Dispersion compensation, attenuation pads, LC jumpers, EEPROM coding, freight, duties, and commissioning. Write each exclusion on its own line. A lower module figure that omits a compensating module is not the lower landed scope.
State 1.25 Gbit/s Gigabit Ethernet or the rate the host actually clocks. An 80 km label on a 10 Gbit/s SFP+ is a different family and must not share this comparison. The host cage mechanical outline can look similar while the electrical interface does not.
Vendors print a class. Your OTDR trace is the length plus splice loss. Ask the supplier which fiber attenuation, in dB/km, and which connector count their class assumes. If your span is 72 km with four patches, recompute instead of trusting the badge.
Request the module dispersion tolerance in ps/nm and whether a compensating module is excluded. A family brochure range is not the tolerance of the model they will ship. Bind the number to the manufacturer and the exact part code.
Name the currency and whether the amount is per module or for the whole order. A high-end, mid-range, budget, or undecided supplier preference is a buyer note. It is not a verified factory grade, and you do not need a live quotation before you send the brief.
Short-reach 1G rows stay on the inquiry list. CWDM grids are a different factory question on the application page.
Include wavelength, fiber type, measured or estimated span loss, host platform, quantity, US destination, and requested timing. The desk will not invent a loss figure you left blank.
QUALIFIED BUSINESS BUYERS
Factory quotations are lined up after the 1G SFP specification is written down.
Eligibility applies to qualified business buyers and is confirmed after we review your product, quantity, destination, and sourcing requirements.