OTDR Launch Cable K-125
OTDR launch fiber in a rugged field case — fiber, length and connectors all made to order: OS2 singlemode or OM1/OM2/OM3 multimode, 500m to 2km as standard, FC/SC/ST/LC/E2000 in UPC or APC.
Typical work: OTDR testing of FTTH, FTTx and backbone links; Measuring the first and last connectors of a link (launch and receive fiber); Acceptance testing and fault location sign-off.
Get a Quote WhatsApp UsNeutral stock in small lots, or private label made to your requirements. Prices on request — EXW factory pricing.
K-125 specifications
| Fiber types | Singlemode G.652D (OS2) 9/125; multimode OM1 62.5/125, OM2 / OM3 50/125 |
|---|---|
| Length | 500 m, 1 km, 2 km standard; other lengths made to order |
| Connectors | FC / SC / ST / LC / E2000 — PC, UPC or APC |
| Leads | Input and output leads, 1 m as standard |
| Typical loss | <0.5 dB @ 1310 nm per 1,000 m (singlemode) |
| Return loss | UPC ≥50 dB; APC ≥60 dB |
| Case | Rugged hard case with carabiner clip |
| Dimensions | — |
| Weight | — |
How a Launch Cable Works
Connect the launch cable between the OTDR and the link under test. The OTDR's pulse travels the launch fiber first; by the time it reaches the link, the pulse has settled and the instrument's dead zone sits harmlessly inside the launch fiber. The link's first connector now shows on the trace as a measurable event, with its loss readable like any other.
For the far end, add a second launch cable as a receive fiber: the last connector gets the same treatment, measured before the trace runs out. Length is chosen against the OTDR's pulse width and the link — 500 m covers most access-network work.
Between tests the fiber stays in its case: unspool only the leads, keep the connectors capped and clean, and the launch fiber's own end faces stay reference-grade — a dirty launch connector prints itself onto every trace you take.
Where the K-125 works
OTDR testing of FTTH, FTTx and backbone links
Part of the Fiber Test Equipment range — see the specifications above for the figures that matter on this work.
Measuring the first and last connectors of a link (launch and receive fiber)
Part of the Fiber Test Equipment range — see the specifications above for the figures that matter on this work.
Acceptance testing and fault location sign-off
Part of the Fiber Test Equipment range — see the specifications above for the figures that matter on this work.
K-125 components
- OTDR launch cable K-125 in hard case (fiber type, length and connectors as ordered)
Documents for this model
Product Catalog 2026 — this model appears in our full-range catalog (PDF), published in the Downloads center.
User manual — if you need the manual for this model now, ask via the inquiry form below or on WhatsApp and we will send the available documents with your quote.
More fiber test equipment
Questions about the K-125
Can the K-125 carry our own brand?
Private labeling is made to your requirements and confirmed per order — labels with your logo, part numbers and barcodes on the tools, the inner boxes and the outer cartons, ready for your warehouse. The products most often labeled are the K-35 cleaver, the KS-1 Kevlar shears and the K-870 stripper.
Can we order a small lot, unbranded?
Yes. Neutral stock is held for the core range: small lots are welcome, you can mix models in one shipment, and restock as you sell. Prices are on request — EXW factory pricing.
Ask for a quote — K-125
Tell us the quantity, and whether you want it neutral or with your brand on it.