Outdoor Cable Procurement
GYXTW, GYTS or GYTA? A Route-Based Comparison for Duct and Aerial Networks
Compare central-tube and stranded outdoor cable by route, fibre count, water blocking, metallic protection, pulling conditions and drum design.
Begin with the route, not the Chinese model code
GYXTW, GYTS and GYTA are useful shorthand in many supply chains, but a buyer should attach a construction description to the code. State whether the route is duct, lashed aerial, supported aerial or another method; the pulling distance; duct occupancy; bends; moisture exposure; rodent risk; and the governing tender standard. IEC 60794-3 describes outdoor cable families, but it does not turn one model name into a universal answer for every route.
GYXTW: compact central loose-tube construction
A typical GYXTW places the fibres in one central loose tube, uses water-blocking materials and adds steel-wire reinforcement beside a steel-tape moisture barrier. Its compact construction can suit lower or moderate fibre counts and distribution routes. Confirm the actual fibre capacity, cable diameter, minimum bend radius and pulling tension. A central-tube product should not be selected only because it is lighter or cheaper if the route needs higher fibre count or more demanding handling.
GYTS: stranded loose tubes with steel tape
A typical GYTS uses several loose tubes stranded around a central strength member, water blocking, corrugated steel tape and a PE outer sheath. The stranded structure accommodates higher fibre counts and separates fibres into identifiable tubes. Steel tape adds mechanical and rodent-related protection, but the finished cable remains a single-sheath outdoor design. Ask whether the proposed installation is duct or supported aerial and which tensile and crush values apply to that exact construction.
GYTA: stranded loose tubes with aluminium tape
GYTA commonly replaces corrugated steel tape with a polymer-coated aluminium moisture barrier. This changes weight, metallic composition and protection characteristics. It is often discussed for duct and outdoor backbone work, yet the route specification must decide whether aluminium tape provides the required mechanical protection. Do not treat GYTA as a direct substitute for GYTS without comparing diameter, weight, tensile performance, crush performance and the project’s rodent or grounding policy.
Do not confuse these cables with direct-buried armour
The metal tape in a standard GYTS or GYTA construction is not the same as the double-sheath armour arrangement used in many 53-series direct-buried designs. If the cable leaves the duct or will be buried directly, review the soil, rocks, compaction, rodents, installation depth and pulling method. The correct outcome may be a different armoured construction, additional conduit or a civil protection measure rather than simply increasing the tape thickness.
Compare datasheets on equal terms
Put fibre standard, fibre count, tube allocation, central strength member, water-blocking method, metal barrier, sheath thickness, diameter, weight, tensile load, crush load, bend radius, temperature range and maximum cabled attenuation in one comparison table. Ask which tests are routine for each production length and which are type tests for the design. ITU-T G.652 defines fibre characteristics; cable construction and mechanical qualification require separate confirmation.
Drum design is part of route design
Choose drum lengths from duct-section lengths, pulling pits, splice locations, cable weight and local handling equipment. Allow for jointing and testing tails according to the installer’s method. Provide sequential metre-marking and drum-number requirements before production. A technically suitable cable can still create waste or an unplanned splice if every drum is ordered at one convenient factory length instead of matching the civil route.
Need help choosing a product?
Send the route, fiber count, quantity and destination country. UKCC Fiber can help match the cable and related FTTH materials.
Request Project Support