GYXY Core Count: Selection Guide & Technical Specifications

December 30, 2025

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GYXY Core Count: Selection Guide & Technical Specifications

GYXY fiber optic cable, a central tube unarmored solution compliant with YD/T 769 standards, is valued for its compact structure, lightweight design, and cost-efficiency in low-risk outdoor scenarios. The GYXY core count—ranging from 2 to 24 cores in 2-core increments—directly dictates its bandwidth capacity, installation feasibility, and application scope. Unlike armored cables (e.g., GYTY53) that prioritize heavy-duty protection, GYXY’s unarmored design optimizes flexibility for aerial, duct, and indoor-outdoor transition projects. This guide explores GYXY core count options, their technical constraints, targeted applications, selection strategies, and installation nuances, integrating industry insights to help professionals avoid common pitfalls and maximize network reliability.

How GYXY Structure Limits Core Count Range

The GYXY core count is inherently constrained by its central tube structure, which balances protection and practicality. GYXY’s design consists of a single high-modulus loose buffer tube (filled with water-blocking gel to safeguard fibers) wrapped in water-swellable yarns, with two parallel steel wires embedded in a UV-resistant polyethylene (PE) outer sheath for tensile strength. This streamlined structure eliminates metal armor, reducing diameter and weight but limiting fiber capacity to a single buffer tube—directly restricting the GYXY core count range.
Unlike layer-stranded cables that use multiple buffer tubes to expand core counts, GYXY’s single buffer tube can only accommodate 2–24 cores without compromising flexibility or fiber protection. This distinguishes GYXY from similar central tube cables like GYXTW—GYXTW adds a steel tape armor layer, allowing marginally higher durability but maintaining a comparable 2–24 core range. For GYXY, the core count increments align with buffer tube capacity: 2–12 cores use a standard buffer tube, while 14–24 cores require a slightly enlarged tube, resulting in minor adjustments to cable diameter and weight.
This structural limitation is not a drawback but a design optimization—GYXY targets projects where armor is unnecessary, leveraging core count specificity to deliver cost savings and easy installation. For example, a 4-core GYXY weighs just 90 kg/km with a 9.5mm diameter, making it ideal for small-scale aerial deployments that don’t require heavy pulling equipment.

GYXY Core Count Ranges: Technical Details & Applications

GYXY core counts are divided into two primary ranges, each tailored to specific project scales and bandwidth demands. Below is a detailed breakdown with technical parameters from real-world manufacturing data and deployment case studies:

1. Low Core Count GYXY (2–12 Cores): Small-Scale Connectivity

2–12 core GYXY is the most widely adopted configuration, optimized for small-scale projects where bandwidth needs are moderate and installation efficiency is critical. This range uses a standard buffer tube, resulting in a consistent diameter of 9.5mm and weight of 90–98 kg/km, with short-term tensile strength of 1500N and long-term strength of 600N.
Typical Applications:
  • Residential FTTH: 4–8 core GYXY is commonly deployed in suburban communities to link distribution boxes to multi-dwelling units. A 6-core GYXY can support 50–80 households via GPON technology, balancing capacity and cost without overengineering.
  • Outdoor Security Networks: 2–4 core GYXY connects security cameras in residential complexes, parking lots, or small industrial yards. Its lightweight design simplifies aerial installation across utility poles, while water-blocking gel ensures reliability in humid environments.
  • Indoor-Outdoor Transition: 8–12 core GYXY bridges indoor networks (e.g., office buildings, small data centers) to outdoor lines. Its compact diameter allows easy routing through conduits and walls, with UV resistance ensuring durability in partial outdoor exposure.
Deployment Tip: For 2–12 core GYXY, maintain a dynamic bending radius of 20× cable diameter during pulling to avoid sheath damage. In aerial applications, use proper hardware to limit sag (0.4–0.6m per 50m span) and prevent excessive tension on the parallel steel wires.

2. Medium Core Count GYXY (14–24 Cores): Mid-Scale Infrastructure

14–24 core GYXY caters to mid-scale projects requiring higher bandwidth, using an enlarged buffer tube to accommodate more fibers. This range has a diameter of 10.2mm and weight of 100–111 kg/km, with reinforced tensile strength (3000N short-term, 1000N long-term) to handle the slightly increased load during installation.
Typical Applications:
  • Campus Networks: 16–24 core GYXY connects buildings across universities, hospitals, or industrial parks via duct or aerial lines. A 24-core GYXY supports high-bandwidth applications like digital classrooms, research labs, and inter-building data sharing, with room for future expansion.
  • Small Municipal Broadband: 18–24 core GYXY is used in town centers to link multiple distribution points, serving 200+ households and small businesses. Its unarmored design reduces costs compared to GYXTW, while maintaining reliability in low-risk urban environments.
  • 5G Small Cell Backhaul: 14–18 core GYXY connects 5G small cells to nearby base stations in dense urban areas. Each core supports multiple 5G data streams, ensuring stable connectivity for mobile users without the need for heavy armored cables.
Deployment Tip: For 14–24 core GYXY, use tension meters during duct installation to keep pulling force below 3000N. In humid or coastal areas, seal splice points with waterproof enclosures to enhance the water-blocking performance of the gel-filled buffer tube.

Key Factors for GYXY Core Count Selection

Choosing the right GYXY core count requires balancing current bandwidth needs, future scalability, installation environment, and budget. Below are industry-proven selection criteria:

1. Bandwidth Demand & Scalability

Calculate current bandwidth requirements and add a 30% buffer for future growth (e.g., 5G expansion, IoT devices, 4K/8K video). Examples:
  • Small Community FTTH: 6-core GYXY for 50 households (100Mbps per household) → 8-core if the community is expected to grow by 20% in 3 years.
  • Campus Network: 16-core GYXY for 3 buildings (200 users total) → 24-core to support new buildings or increased cloud usage.

2. Installation Environment Risk Level

  • Low-Risk Areas (Aerial, Duct in Urban Zones): GYXY is ideal, with core count determined by bandwidth. Avoid over-specifying cores (e.g., 24-core for a small office park) to control costs.
  • Moderate-Risk Areas (Rodent-Prone Zones): GYXY is not recommended—opt for armored GYXTW instead, even if core count needs are low.
  • Outdoor Exposure: All GYXY core counts feature UV-resistant PE sheaths, but 14–24 core models have thicker sheaths for enhanced durability in prolonged sunlight.

3. Fiber Type Compatibility

The GYXY core count aligns closely with fiber type: single-mode fiber (G.652D/G.657A1) is standard for all core counts, supporting long-distance transmission (up to 100km at 10Gbps). Multi-mode fiber (OM3/OM4) is limited to 2–12 core GYXY, making it suitable only for short-range indoor-outdoor transitions (≤550m) where bandwidth needs are moderate.

GYXY Core Count Technical Specifications Table (SEO-Optimized)

Below is a keyword-enhanced table of GYXY core count-specific parameters, aligned with YD/T 769 and IEC 60794-1 standards:
GYXY Core Count Range
GYXY Cable Diameter (mm, Approx.)
GYXY Cable Weight (kg/km, Approx.)
GYXY Short-Term Tensile Strength (N)
GYXY Long-Term Tensile Strength (N)
GYXY Max Crush Resistance (N/100mm)
GYXY Bending Radius (Static/Dynamic)
GYXY Typical Fiber Type
Max Attenuation (1310nm, dB/km)
GYXY Primary Application
2–12 Cores
9.5
90–98
1500
600
300/1000 (Long/Short Term)
10D/20D
G.652D/G.657A1 (SMF); OM3 (MMF)
0.36
Residential FTTH, Security Networks
14–24 Cores
10.2
100–111
3000
1000
1000/3000 (Long/Short Term)
10D/20D
G.652D (SMF)
0.36
Campus Networks, 5G Small Cell Backhaul

GYXY vs. GYXTW: Core Count & Performance Comparison

A common dilemma is choosing between GYXY and GYXTW, both central tube cables with 2–24 core ranges. The key differences lie in armor and cost, which impact core count utility:
  • Armor: GYXTW adds a steel tape armor layer, making it suitable for moderate-risk areas (rodent-prone zones), while GYXY is unarmored for low-risk scenarios.
  • Cost: GYXY is 15–20% more affordable than GYXTW for the same core count, making it preferable for budget-constrained projects.
  • Installation: GYXY’s lighter weight (90kg/km vs. GYXTW’s 110kg/km for 12 cores) simplifies aerial and duct installation, reducing labor costs.
For GYXY core counts ≤12, this cable is the optimal choice in low-risk areas due to its cost-efficiency and easy installation. For 14–24 core GYXY deployments in moderate-risk environments, GYXTW is worth the premium for added armor protection, ensuring the core count’s bandwidth capacity is not compromised by external damage.

Common GYXY Core Count Myths Debunked

Misconceptions about GYXY core counts often lead to poor project decisions. Below are industry insights to clarify key myths:

Myth 1: GYXY can support core counts above 24.

Fact: GYXY’s single buffer tube design limits core counts to 24. Core counts above 24 require layer绞式 cables (e.g., GYTS) with multiple buffer tubes—attempting to force more fibers into GYXY compromises flexibility and fiber protection.

Myth 2: Higher core count GYXY is less durable.

Fact: 14–24 core GYXY has reinforced tensile strength and thicker sheaths compared to 2–12 core models, ensuring comparable durability in low-risk environments. Durability is determined by design, not core count within the 2–24 range.

Myth 3: Multi-mode GYXY is available for all core counts.

Fact: Multi-mode GYXY is only available for 2–12 cores. The enlarged buffer tube for 14–24 core GYXY is optimized for single-mode fibers, and multi-mode fibers would compromise attenuation performance.

Why Choose TTI Fiber for GYXY Core Count Solutions

Selecting the right GYXY core count is only effective with a reliable manufacturer that ensures consistent quality and compliance with industry standards. TTI Fiber, a global leader in fiber optic products, offers tailored GYXY solutions across all core counts, backed by strict quality control and comprehensive support.
Founded in 2013, TTI Fiber Communication Tech. Co., Ltd., is a professional manufacturer specializing in Fiber optic products. Our factory located in Shenzhen, China, covers an area of 12,000 square meters and has obtained ISO 9001, ISO 14001, REACH, RoHS, CE and CPR certificates and so on. We have a wide range of fiber optic products, including Fiber Optic Cable, Fiber Optic Patch Cord, Fiber Optic Splitter, Fiber Optic Patch Panel, FTTx products, etc. We also provide professional Fiber Cabling Solutions and one-stop OEM & ODM service. Our main markets are in North America, South America, Europe, Africa and Asia. Our reliable quality and sincere service are highly recognized by our clients all over the world. We cooperated with Global 500 top brands on FTTx products, and more than 30 well-known brand clients in fiber optic industry. Our products are exported to over 100 countries. We are committed to providing our clients with the best support, regardless of their business scale. Our expertise and knowledge of market trends, enables us provide technical support and matched solutions on fiber optic products. We are proud of providing excellent quality, competitive price and timely delivery.
TTI Fiber’s GYXY cables cover 2–24 core counts with single-mode and multi-mode options, adhering to YD/T 769 and IEC standards. Our precision manufacturing ensures consistent parameters across every batch—from buffer tube fiber placement to sheath thickness—while customizable solutions (e.g., LSZH sheaths for flame-retardant needs) cater to special project requirements. TTI Fiber’s technical team provides end-to-end support, from core count selection and installation guidance to post-sales maintenance, helping clients optimize GYXY deployment for performance and cost.

Conclusion: Optimizing GYXY Core Count for Project Success

GYXY’s 2–24 core range is a testament to its design focus on low-risk, cost-effective outdoor connectivity. By aligning GYXY core count with bandwidth demand, installation environment, and fiber type, and partnering with a trusted manufacturer like TTI Fiber, professionals can deploy reliable, scalable networks. Whether for small residential FTTH or mid-scale campus infrastructure, GYXY’s core count specificity ensures this cable delivers value without overengineering—solidifying its role as a versatile solution in modern fiber optic networks.