FTTH (Fiber to the Home) fiber optical cable is a specialized communication cable designed to deliver high-speed broadband internet directly from a provider’s central hub to a residential home or business. It is the "last mile" link in a 100% fiber optic network, replacing traditional copper or coaxial cables to provide superior speed and reliability.
Key Characteristics & Design
- Structure:Often features a butterfly or bow-type flat profile, which is lightweight and compact for easy installation through ducts or along walls.
- Fibers:Typically contains 1 or 2 single-mode fibers (G.657 series), which are "bend-insensitive," meaning they can handle tight turns in home wiring without losing signal.
- Strength Members:Reinforced with FRP (Fiber Reinforced Plastic) or steel wires to provide tensile strength during pulling and to protect the delicate glass cores from crushing.
- Jacket:Usually made of LSZH (Low Smoke Zero Halogen) material, which is flame-retardant and safer for indoor use by reducing toxic fumes during a fire.
Common Types of FTTH Cable
- Indoor Drop Cable: Small and flexible, designed for routing within buildings to the user's Optical Network Terminal (ONT).
- Self-Supporting Outdoor Cable: Features an extra "messenger" steel wire, allowing it to be strung overhead between utility poles.
- Pre-Terminated Cables: Come with factory-installed connectors (like SC/APC or SC/UPC), reducing the need for specialized splicing tools on-site.
Why FTTH is Preferred
- Speed: Supports gigabit speeds (1 Gbps+) and beyond, far outperforming copper-based DSL or cable modem systems.
- Reliability: Immune to electromagnetic interference (EMI) and less susceptible to weather-related degradation than metal wires.