Requirements for Outdoor Laying of Drop Optical Cables

The ICEA S-110-717: 2019 standard is the primary guideline for outdoor drop optical cables, specifying materials, construction, performance, and installation requirements for last-mile fiber deployments.

Overview of ICE

A S-110-717: 2019The ICEA S-110-717: 2019 standard provides detailed requirements for optical fiber drop cables used in outdoor and indoor/outdoor applications, particularly for Multiple Dwelling Units (MDU) and Fiber-to-the-X (FTTX) networks. It covers: Materials and construction: Specifies water-blocking, UV-resistant jackets, and ruggedized designs to withstand environmental stress. Performance requirements: Defines tensile strength, minimum bend radius, and signal integrity for voice, video, and data transmission.

Installation methods: Includes aerial (self-supporting or lashed), underground (direct burial, trenching, or duct installation), and hybrid cables combining optical fibers with metallic conductors.

For MDU and FTT

X applications, if a cable falls under ICEA S-115-730, the S-730 requirements supersede S-110-717.

Construction and Fiber Types

Outdoor drop cables are designed to endure UV exposure, temperature variations, wind, rain, and mechanical impacts. Common constructions include: Loose tube cables: Fibers are encased in gel-filled buffer tubes, providing moisture resistance and protection from physical stress, suitable for exposed conduits and transitions between outdoor and indoor segments. Micro cables: Compact designs (1–2 mm diameter) for high-density fiber deployment in congested ducts, reducing installation complexity and cost.

Ribbon cables: Multiple fibers bonded side-by-side for efficient space utilization. Bend-insensitive fibers: Typically G. 657.

A2 or G. 657. B3, minimizing signal loss in tight bends during installation.

Installation Considerations

Outdoor drop cables must comply with tensile ratings and minimum bend diameters specified in the standard. Installation options include: Aerial deployment: Self-supporting or lashed to messenger wires. Underground deployment: Direct burial, trenching, or duct installation, often using microducts for easier fiber insertion.

Pre-terminated or field-terminated connectors: SC/APC, LC/APC, or FC types, depending on network requirements. Key Features for Outdoor ReliabilityWater-blocking technology to prevent moisture ingress.

U

V and fungus resistance for long-term outdoor exposure. Mechanical protection against crushing, tension, and rodent damage. Temperature tolerance typically ranging from -40°C to +70°C.

Summary

For outdoor drop optical cables, ICEA S-110-717: 2019 provides the authoritative standard, ensuring cables are robust, water-resistant, and suitable for last-mile FTTX and MDU deployments. Compliance with this standard, along with proper fiber type selection (e.g., bend-insensitive fibers) and installation practices, ensures reliable performance in harsh outdoor environments.