Choose indoor dual-core optical cables based on fiber type, jacket material, fire rating, bend radius, and connector compatibility to ensure safe, high-performance installation.

Fiber Type

Indoor dual-core cables are typically duplex, containing two fibers for bidirectional communication. You can select between:

• Single-mode (OS1/OS2): Ideal for long-distance, high-speed applications; low attenuation (0.3–0.4 dB/km) and high bandwidth, suitable for distances up to 40 km ( ).
• Multimode (OM1/OM2/OM3/OM4/OM5): Suitable for shorter distances, such as within buildings or data centers; supports high-speed Ethernet (10–100 Gbps) over tens to hundreds of meters ( ).

Cable Construction

Indoor cables often use tight-buffered or breakout designs:

• Tight-buffered duplex (zipcord): Two fibers in a single jacket, flexible, easy to terminate, ideal for patch cords ( ).
• Breakout cables: Each fiber has its own jacket and strength member, providing superior tensile and crush resistance, suitable for industrial or high-stress environments ( ).

Jacket Material and Fire Rating

• LSZH (Low Smoke Zero Halogen): Preferred for indoor use, especially in confined spaces, as it emits minimal smoke and toxic fumes during fire ( ).
• PVC (Polyvinyl Chloride): Cost-effective, flame-retardant, suitable for general indoor applications.
• Fire ratings: Ensure compliance with local codes (e.g., UL OFNR/OFNP, CPR, NEC Article 770) for plenum or riser installations ( ).

Mechanical and Installation Considerations

• Minimum bend radius: Check the cable's bend radius to prevent signal loss; indoor dual-core cables typically allow 20–25 mm for tight-buffered designs ( ).
• Tensile strength: Consider maximum pulling force during installation; breakout cables offer higher load tolerance ( ).
• Flexibility: Important for routing through conduits, cable trays, or around corners.

Connector Compatibility

Select cables compatible with your network equipment:

• Common connectors: ST, SC, LC for duplex indoor cables ( ).
• Ensure fiber type matches the transceiver or switch ports (single-mode vs multimode).

Summary Recommendations

1. For office or data center patching: 2-fiber tight-buffered LSZH duplex cable with LC connectors.
2. For industrial or high-stress environments: 2-fiber breakout LSZH cable with aramid strength members.
3. For long-distance indoor runs: Single-mode OS2 duplex cable with proper fire-rated jacket.
4. For short-distance high-bandwidth applications: Multimode OM3/OM4 duplex cable with bend-insensitive fibers. By considering fiber type, cable construction, jacket material, fire rating, bend radius, tensile strength, and connector compatibility, you can select the optimal indoor dual-core optical cable for safe, reliable, and high-performance network installations ( ).