OUTDOOR OPTICAL CABLE · GYTA / GYTS / GYTA53 · IEC 60794
GYTA, GYTS & GYTA53 — duct, aerial and direct-buried optical cable.
Loose-tube stranded outdoor optical cable, 24 to 576 cores, single-mode G.652D / G.655 or multimode. Three armour levels cover everything from protected duct routes to direct burial. Parameter tables below are from our 2026 catalogue.
§01 — Three armour levels
Same cable core, three levels of protection.
| Model | Armour class | Конструкция | Installation |
|---|---|---|---|
| GYTA | Non-armoured, APL moisture barrier | Corrugated aluminium-polyethylene laminate (APL) longitudinal wrap under a single PE sheath. Lightest weight; rodent and crush protection is limited. | Duct · aerial (lashed) |
| GYTS | Light armoured, PSP tape | Corrugated chrome-plated steel-polyethylene laminate (PSP) wrap under a single PE sheath. Better crush and rodent resistance than GYTA. | Duct · aerial |
| GYTA53 | Heavy armoured, double sheath + PSP | APL moisture barrier + inner PE sheath + PSP armour + outer PE sheath. The standard direct-burial construction. | Direct burial · duct |
Common core: fibres in PBT loose tubes with water-blocking compound, phosphated steel-wire central strength member (PE-coated for higher core counts), tubes and fillers stranded around the CSM, water-blocking fillers in the interstices.
§02 — Technical parameters
Core counts and reference diameters.
| Fibre count | Loose tubes × fibres/tube | GYTA ref. OD (mm) | GYTS ref. OD (mm) |
|---|---|---|---|
| 24 | 4×6 | 9.0 | 10.0 |
| 48 | 4×12 | 11.0 | 11.5 |
| 96 | 8×12 | 13.5 | 14.5 |
| 144 | 12×12 | 17.0 | 17.5 |
| 288 | 24×12 | 18.0 | 18.0 |
| 432 | 36×12 | 19.0 | 19.0 |
| 576 | 24×24 | 21.5 | 22.0 |
| Параметр | GYTA | GYTS | GYTA53 |
|---|---|---|---|
| Central strength member | Phosphated steel wire | Phosphated steel wire | Phosphated steel wire |
| Moisture barrier | APL laminate | — (PSP armour) | APL laminate |
| Броня | — | Corrugated PSP tape | Corrugated PSP tape |
| Оболочка | Black PE, 1.8 ± 0.2 mm | Black PE, 1.8 ± 0.2 mm | Inner PE + outer PE |
| Tensile, short / long term | 1500 / 600 N | 1000 / 600 N | 3000 / 1000 N |
| Crush, short / long term | 1000 / 300 N | 1000 / 300 N | 3000 / 1000 N |
| Operating temperature | −40 … +70 °C | −40 … +70 °C | −40 … +70 °C |
GYTA53 values per catalogue construction class; GYTA53 direct-burial ratings confirmed per core count with the formal offer. Other structures and core counts on request.
§03 — Mechanical & environmental type tests
Every design is type-tested per IEC 60794-1-2.
| Test | Method | Requirement |
|---|---|---|
| Tensile | IEC 60794-1-2-E1 | Additional attenuation ≤ 0.1 dB (short term) |
| Crush | IEC 60794-1-2-E3 | Additional attenuation ≤ 0.1 dB (short term) |
| Impact | IEC 60794-1-2-E4 | 1 m, 450 g, ≥ 5 impacts · residual ≤ 0.03 dB |
| Repeated bending | IEC 60794-1-2-E6 | 150 N, 30 cycles · residual ≤ 0.03 dB |
| Torsion | IEC 60794-1-2-E7 | 1 m, ±180°, 10 cycles · residual ≤ 0.03 dB |
| Temperature cycling | IEC 60794-1-2-F1 | −40 … +70 °C · attenuation change ≤ 0.05 dB/km |
SPFO GYTA — □□ / GYTS — □□ / GYTA53 — □□
1 — Fibre count: 2–576
2 — Fibre type: B1.3 (G.652D) · B4 (G.655) · A1a (50/125) · A1b (62.5/125)
Delivery: standard wooden drums, nominal 2 km or 3 km; other lengths on request.
PRODUCT VIEWS
The range at a glance.
§04 — FAQ
Common questions on outdoor optical cable.
GYTA vs GYTS vs GYTA53 — which one do I need?
By installation: protected duct with low crush risk → GYTA (lightest, cheapest). Duct or aerial with moderate crush / rodent risk → GYTS. Direct burial or high mechanical risk → GYTA53 (double sheath + armour). All three share the same cable core and fibre performance, so the choice costs you only sheath and armour money.
What fibre counts can you produce?
24 to 576 cores in loose-tube stranded designs (4×6 up to 24×24 tube configurations). Centre-tube designs (GYXTW) cover 2–24 cores for access networks. Ribbon designs (GYDTA / GYDTS) for high-count backbones on request.
Which fibre type should be specified — G.652D or G.655?
G.652D is the default for metro, access and FTTH: lowest cost, full 1310/1550 nm windows. G.655 (NZDSF) suits long-haul DWDM links where dispersion management matters. For FTTH drop and in-building runs, ask for G.657A1/A2 bend-insensitive fibre.
Can the cable be supplied with LSZH sheath for tunnels?
Yes. Flame-retardant LSZH sheathed versions are produced against confirmed specification, with IEC 60332-3 flame performance and IEC 61034 / 60754 smoke and halogen verification.
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Share: fibre count & type (G.652D / G.655 / multimode), installation method, span or duct profile, armour requirement, delivery length and destination port.
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Construction, test values and reference dimensions as a PDF — attach it to your enquiry or keep it in the project file.
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