Function of Two-Core Indoor Optical Cable

A 2-core indoor optical cable is typically a tight-buffered, singlemode fiber cable with LSZH jacket, designed for flexible, high-performance indoor networking and FTTH applications.

Key Features

Fiber Type: Usually singlemode (9/125 µm, OS2) for long-distance, high-speed transmission, though multimode options exist for shorter distances and high-bandwidth LANs ( ). Construction: Tight-buffered fibers (0. 9 mm) are individually coated with UV-curable acrylate for protection, surrounded by aramid yarn for tensile strength, and enclosed in an LSZH outer jacket for low smoke and halogen-free safety ( ).

Cable Diameter: Typically ranges from 2. 8 mm to 4. 2 mm depending on the jacket and reinforcement layers ( ).

Strength Members: Some designs include FRP (fiberglass reinforced plastic) rods or parallel strength members to enhance durability and prevent fiber breakage during installation ( ). Connector Compatibility: Often pre-terminated with LC/APC connectors for FTTH or patching in communication cabinets ( ).

Applications

Indoor Networking: Connecting workstations, patch panels, and communication cabinets within buildings.

FTT

H Installations: Linking wall boxes, terminals, and indoor distribution points. Riser and Plenum Use: Certain 2-core cables are rated for vertical shafts (riser) or plenum spaces, meeting flame-retardant and low-smoke requirements ( ).

Advantages

Flexibility: Tight-buffered design allows small bending radius and easy routing in limited spaces. Safety: LSZH jackets reduce toxic smoke in case of fire, suitable for indoor environments. Ease of Installation: Pre-terminated or field-installable connectors simplify deployment in communication cabinets and wall outlets.

Example Specifications

Core Diameter: 9 µmCladding Diameter: 125 µmTight Buffer: 0. 9 mmOuter LSZH Jacket: 4. 2 mm diameterWeight: ~15.

5 kg/kmStandards: G. 657. A2, OS2 singlemode, LSZH ( ) In summary, a 2-core indoor optical cable is a compact, flexible, and safe solution for indoor fiber connectivity, ideal for FTTH, interconnects, and building backbone networks, providing high-speed, low-loss transmission with easy installation and compliance with safety standards.