Indoor Tight-Buffered Optical Cables | 900μm Tight-Buffered, Simplex & Duplex Fiber Types

■ What is an Indoor Tight-Buffered Fiber Optic Cable?

Indoor tight-buffered fibers (900μm tight-buffered) are used as a central structure and are armed with Kevlar aramid yarns, which have a good flame retarding feature. They are even more flexible than outdoor loose-tube cables. They are more compact; therefore, they can be used indoors as preferred. 

It is used often in the following basic cases: 

• It is a connection between the distribution frame and the equipment, the patch cords. 

• In-house connectivity of devices (like ONU, transceiver). 

• Drop wiring for FTTH (Fiber to the Home) provides a line connection to homes. 

• Fabrication of fiber pigtails and patch cords. 

The cables feature easy stripping, superior flexibility, and universal installation, making them suitable for various amplification purposes in communications or networking systems. 

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■ Technical Parameters Comparison

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■ Zion Indoor Tight-Buffered Cable Product Range 

Zion Communication gives a complete series of indoor tight-buffered cables, differentiated into four major categories:

1️⃣ Tight-Buffered Fiber 

• Structure: (900μm) Tight buffered fibers that, if needed, can come with the outer coat or remain bare 

• Advantages: Simple for fusion or mechanical splicing, easy handling, and wrapping. 

• Applications: Suitable for pigtails, patch cords, and indoor connections over short distances. 

• Recommended Types: G.657.A1 / A2, G.652.D 

2️⃣ Simplex Round Indoor Cable 

• Structure: One 900μm tight-buffered fiber reinforced with Kevlar strength members and LSZH or PVC flame-retardant sheath. 

• Advantages: High-reliability, low smoke, and LSZH which is compatible with standard connectors. 

• Typical Use: A patch cord form device-to-device connections, patch panels, FTTH, and intelligent building wiring. 

3️⃣ Standard Parallel Duplex Flat Indoor Cable (Type A) 

• Structure: Two equal lengths of 900μm tight-buffered fibers, with a flat LSZH jacket or surrounded by an outer jacket. 

• Advantages: Ideal for flat surface layouts, with easy installation and maintaining flexibility. 

• Typical Use: The optical transceivers, ONU devices, and duplex communication modules are the components to which this connection line is attached. 

4️⃣ Enhanced Duplex Flat Indoor Cable (Type B) 

• Structure: Fibers and FRP or Steel wire as the strength component in the cable, protected by an LSZH flat jacket (available both black and white). 

• Advantages: Enhanced tensile and compression strength allows for longer connections and complex routing. 

• Applications: Building backbone extension, splitter connect, and indoor FTTH systems demanding higher mechanical durability. 

■ Packaging & Service Support 

• Delivery Options: In coils or bundled bags, respectively, as specified. 

• Customization: Length, color, printing, and labeling options are available upon request. 

• OEM/ODM: Brand custom decoration, color jacket printing, and connectors termination services.

■ Why Choose Zion Communication?

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