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8F to 144F backbone trunk, panel to panel, factory tested.
The backbone of a parallel-optics data centre: a single jacketed cable carrying 8 to 144 fibres with a factory-terminated MPO at each end. It replaces dozens of duplex jumpers with one pull, and because every ferrule is polished and interferometer-checked in the factory rather than on a ladder, the loss budget you design with is the loss budget you get.
Assemblies are built on US Conec MTP® ferrules and terminated in a controlled environment, then measured fibre by fibre. Interferometry checks the three geometry parameters that decide whether a multi-fibre ferrule mates properly — radius of curvature, apex offset and fibre height — and every end face is inspected and graded to IEC 61300-3-35 before the dust cap goes on.
Fibre count, fibre type, polish, polarity, gender, jacket rating, leg length and overall length are all build options rather than catalogue limits. Use the selector above to configure the exact assembly and the specification table will follow your choices; the measured test report ships with the cable.
| Fiber Count | 12F |
|---|---|
| Fiber Type | OS2 single-mode, G.652.D — Corning SMF-28 Ultra |
| Wavelength | 1310 / 1550 nm |
| Insertion Loss | ≤ 0.35 dB |
| Return Loss | ≥ 60 dB |
| Connector Polish | APC — 8° angled, green housing |
| Polarity | Type B (reversed) — the usual choice for port-to-port parallel links |
| Attenuation | ≤ 0.4 dB/km @1310 nm, ≤ 0.3 dB/km @1550 nm |
| Typical Insertion Loss | 0.25 dB |
| Loss Grade | Standard |
| Connector | US Conec MTP® / MPO, 12-fibre ferrule |
|---|---|
| Gender | Female to female — no guide pins |
| Cable Jacket | LSZH round, 3.0 mm |
| Jacket Colour | Yellow |
| Flame Rating | IEC 60332-1 LSZH |
| Length | 5 m (custom lengths to 500 m) |
| Min. Bend Radius | 10 × cable OD dynamic, 5 × static |
| Crush Resistance | ≥ 1000 N / 100 mm |
| Tensile Strength | Short term 100 N / long term 30 N |
| Operating Temp | -10 °C to +60 °C |
| Storage Temp | -40 °C to +75 °C |
| Compliance | IEC 61754-7, TIA-604-5 (FOCIS-5/10), RoHS |
| Optical Test | 100% — every fibre measured for insertion loss and return loss before shipment |
|---|---|
| Ferrule Geometry | Interferometer-verified: radius of curvature, apex offset and fibre height to IEC 61755-3 |
| End-Face Inspection | Every ferrule inspected and graded to IEC 61300-3-35 |
| Test Report | Per-fibre measured data supplied with the assembly, traceable to the serial number |
| Connector Source | US Conec MTP® ferrules; genuine-brand or FOT MPO to your preference |
| Customisation | Fibre count, type, polish, polarity, gender, jacket, leg length and overall length built to order |
| Lead Time | Stock configurations 3–5 days; custom builds 7–10 days |
| Warranty | 3 years |
| Part Number | Configuration | Fibre count | Availability |
|---|---|---|---|
| FOT-MPO-TRUNK | Standard configuration | 12F | Build to order |
| FOT-MPO-TRUNK-8F | Fibre count: 8F | 8F | Build to order |
| FOT-MPO-TRUNK-16F | Fibre count: 16F | 16F | Build to order |
| FOT-MPO-TRUNK-24F | Fibre count: 24F | 24F | Build to order |
| FOT-MPO-TRUNK-32F | Fibre count: 32F | 32F | Build to order |
| FOT-MPO-TRUNK-48F | Fibre count: 48F | 48F | Build to order |
| FOT-MPO-TRUNK-72F | Fibre count: 72F | 72F | Build to order |
| FOT-MPO-TRUNK-144F | Fibre count: 144F | 144F | Build to order |
| FOT-MPO-TRUNK-657A1 | Fibre type: G.657.A1 bend-insensitive | 12F | Build to order |
Part numbers are indicative. Send us the fibre count, type, polish, polarity, gender, jacket and length and we confirm the exact build code on the quotation.
Insertion loss and return loss recorded for every fibre, not sampled.
Interferometer data on ferrule radius, apex offset and fibre height.
Every end face checked against IEC 61300-3-35 before packing.
Dust-capped, coiled on a reel or in a bag with the test report and pulling sock.
Parallel 40G/100G/400G/800G backbone between spine, leaf and top-of-rack panels.
Rail-optimised accelerator fabrics where one switch port breaks out to several GPUs.
Pre-terminated backbone that installs in hours instead of days, with the loss budget known up front.
Loopbacks, attenuators and inspection for proving ports before the link goes live.
For a straight port-to-port parallel link — say 400G-SR8 to 400G-SR8 through two patch panels — Type B is the normal answer, and it is what we ship unless you say otherwise. Type A is used when the crossover is handled elsewhere in the channel, and Type C is a legacy scheme for carrying duplex pairs over MPO. Our polarity guide works through all three end to end.
Single-mode parallel optics are almost always APC (green). The 8° angle throws back-reflection into the cladding instead of down the fibre, which matters when eight or sixteen lanes share one connector. Multimode is normally UPC/PC. APC and UPC must never be mated to each other — you will damage both.
Yes. Every fibre of every trunk is measured for insertion loss and return loss, and interferometer data for ferrule geometry (radius, apex offset, fibre height) is on file. The measured report ships with the cable and is quoted against the serial number.
Yes — lengths are cut to order up to 500 m, and we can supply a pulling eye and a protective sleeve for long conduit runs. Tell us the route length plus slack for the panels; a trunk that is 2 m short is scrap.
Both ends carry a printed label with the part number, fibre count, fibre type, polarity type and the serial number, and breakout legs are individually numbered. Tell us your own labelling convention on the RFQ and we print to it — it costs nothing and it saves an afternoon at installation.
Yes. We supply qualification samples so you can measure the loss and check the fit in your own panels before committing. Per-order test reports are standard, and sample reports can be provided in advance for tender documentation.
Tell us the platform and the quantity. An engineer checks the part against your switch and software version before quoting — if it will not work, we say so.
Goes to our engineers and the quotation desk together. Replies come from sales@topnetsystem.com, usually within one working day.