GYTS
GYTS 24F Stranded Loose Tube Duct Fiber Optic Cable
GYTS 24F Stranded Loose Tube Duct Fiber Optic Cable for outdoor plant use at 24F. Confirm model, fiber count and installation method against the source drawing.

Buyer-oriented summary
This working record describes a 24-fiber GYTS loose-tube cable proposed for duct routes. The supplied table lists six fibers per tube, four tubes plus one filler, a black PE sheath, an 8.5 mm cable diameter and a 69 kg/km cable weight. These values are not released specifications: BWNFiber must first reconcile this record with the separate 24F GYTS construction and issue the applicable controlled datasheet or drawing.
Working configuration table
| Field | Working value from P178 | Release status |
|---|---|---|
| Product family | GYTS | TBC — confirm product master identity |
| Fiber count | 24F | TBC — confirm exact configuration |
| Fibers per tube | 6 | TBC — approved drawing/source row required |
| Tubes / fillers | 4 / 1 | TBC — approved drawing/source row required |
| Loose-tube diameter | 1.6 mm | TBC — tolerance and measurement basis required |
| Coated steel-wire diameter | 1.2 mm | TBC — confirm component and measurement basis |
| Central strength member | TBC — source required | Do not label steel tape as the strength member |
| Armor | Corrugated steel tape — TBC | BOM/drawing required |
| Outer sheath | Black PE — TBC | Compound, rating and color approval required |
| Cable diameter | 8.5 mm | TBC — nominal/tolerance basis required |
| Cable weight | 69 kg/km | TBC — nominal/tolerance basis required |
| Tensile load | 1500 N short term / 600 N long term | TBC — method and duration required |
| Crush resistance | TBC — source required | Supplied 1000/3000 short/long mapping must be reconciled |
| Fiber grade | TBC — source required | Do not infer G.652.D from the family page |
| Installation route | Duct — conditional | Approved route and pulling conditions required |
Optical working values
The supplied P178 record contains the values below. They are preserved for engineering reconciliation only and must not be represented as approved performance until the fiber grade, source revision and test basis are confirmed.
| Parameter / condition | Working value | Status |
|---|---|---|
| Mode-field diameter at 1310 nm | 9.2 ± 0.4 μm | TBC |
| Cladding diameter | 125 ± 1 μm | TBC |
| Core concentricity error | ≤ 0.6 μm | TBC |
| Cladding non-circularity | ≤ 1.0% | TBC |
| Cable cutoff wavelength | ≤ 1260 nm | TBC |
| Fiber cutoff wavelength | 1180–1330 nm | TBC |
| Primary coating diameter, excluding color layer | 245 ± 10 μm | TBC |
| Primary coating diameter, including color layer | 250 ± 15 μm | TBC |
| Coating–cladding concentricity error | ≤ 12.5 μm | TBC |
| Fiber curl radius | ≥ 4 m | TBC |
| Attenuation at 1310 nm | ≤ 0.36 dB/km maximum | TBC; not a link budget |
| Attenuation at 1550 nm | ≤ 0.21 dB/km maximum | TBC; not a link budget |
| Chromatic dispersion, 1288–1339 nm | ≤ 3.5 ps/(nm·km) | TBC |
| Chromatic dispersion at 1550 nm | ≤ 17 ps/(nm·km) | TBC |
| Zero-dispersion wavelength | 1300–1324 nm | TBC |
| Zero-dispersion slope | ≤ 0.092 ps/(nm²·km) | TBC |
| Dispersion-mode-bias field in V4 | 0.5 ps/km1/2 | Blocked — parameter name and unit require correction |
Environmental working values
| Parameter | Working value | Status |
|---|---|---|
| Operating temperature | −30 to +60 °C | TBC — qualification source required |
| Installation temperature | −30 to +60 °C | TBC — handling approval required |
| Storage temperature | −40 to +70 °C | TBC — qualification source required |
| Fiber macro-bend test | ≤ 0.1 dB at 1550 nm, 60 mm diameter, 100 turns | TBC — not a finished-cable bend-radius specification |
Selection and RFQ steps
- Reference the confirmed GYTS part/configuration ID and controlled revision.
- State the route as duct and provide duct size, occupancy, length, bends, pulling method and environmental conditions where relevant.
- Confirm the fiber grade, fiber count, tube/filler map, central member, armor and sheath construction.
- Confirm finished-cable diameter, mass, tensile/crush criteria and installation/installed bend limits with their test basis.
- Specify total length, length per drum, quantity, sheath marking, label language, packaging, destination and target schedule.
- List required documents: approved datasheet, construction drawing, applicable inspection/test evidence, packing data and approved deviations.
Merge-ready CTA
Request the controlled 24F GYTS configuration and quotation. Send the duct route, required length, drum lengths, quantity, marking, destination and approval-document list. Ask BWNFiber to identify the applicable part/configuration revision and close every TBC field before order approval.
Merge-ready FAQs
Is this P178 record the same as BWNFiber’s other 24F GYTS configuration?
That has not been established. The two working records list different dimensions and performance values. BWNFiber Product/Engineering must map both records to part numbers, BOMs and controlled revisions before either set of values is used for quotation or publication.
Can the 8.5 mm and 8.6 mm GYTS specifications be combined?
No. A small diameter difference may represent a tolerance, revision, extraction issue or genuinely different construction. Do not combine values until the controlled drawings and product identities show how the records relate.
Is corrugated steel tape the central strength member?
The supplied P178 table is ambiguous. The diagram labels steel wire and steel tape separately, so the approved BOM or drawing must identify the central strength member and armor as separate components.
What crush resistance applies?
TBC. The V4 row lists 1000/3000 N/100 mm for short-/long-term conditions, but the mapping requires Quality review. Do not quote either value until the source row and test basis are confirmed.
Is the cable approved for aerial installation?
Not from the supplied evidence. The page title and introduction focus on duct use, while one table mentions duct/aerial. Aerial use requires an approved support method and applicable mechanical/environmental design; self-supporting use must never be inferred.
What fiber grade does this record use?
TBC — source required. The optical values alone do not authorize labeling this record G.652.D or another specific grade.
Are the attenuation figures a complete link-loss budget?
No. Working cable/fiber attenuation values do not include installed length variance, splices, connectors, bends, workmanship or design margin. Link acceptance requires a separate project method and budget.
What should be sent for a quotation?
Send the confirmed configuration ID, route, environmental and mechanical requirements, total and drum lengths, quantity, marking, packaging, destination, schedule and required approval documents.
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