Quick Answer / Summary: An LC to LC fiber cable is a duplex optical patch assembly pre-terminated with LC connectors on both ends. Manufactured across singlemode (OS2) and multimode (OM3/OM4/OM5) glass in traditional zipcord or slim uniboot form factors, it routes bidirectional transmit (TX) and receive (RX) channels between network switches and distribution frames with insertion loss below 0.2dB.
In modern cloud computing facilities, enterprise server rooms, and telecommunications cross-connects, the LC to LC fiber cable is the undisputed industry standard for optical patching. Connecting optical transceivers directly to structured fiber distribution panels, deploying certified low-loss LC to LC jumpers guarantees full-bandwidth 10G, 40G, and 100G Ethernet throughput with zero packet drops.
Duplex Interconnect Engineering: Simultaneous Full-Duplex Transmission
An LC to LC patch cord provides dedicated optical highways: 1. Physical Channel Separation: One LC connector strand carries Transmit (TX) data while the paired strand carries Receive (RX) data, providing simultaneous collision-free full-duplex throughput; 2. TIA-568 Crossover Polarity (A-to-B): To ensure the laser output at Switch 1 connects to the photodiode receiver at Switch 2, standard LC to LC patch cords incorporate an A-to-B crossover polarity configuration.
Zipcord vs. Round Uniboot Construction
While legacy LC-LC cords use twin side-by-side zipcord cables, modern high-density data centers utilize round 2.0mm uniboot cables. Packaging both fibers inside a single slim jacket cuts cable volume by 50% and improves airflow cooling across packed server chassis.
Tool-Less Polarity Reversal
High-grade uniboot LC to LC jumpers feature an integrated quick-release clip that allows network technicians to swap the A and B connector positions in five seconds without cutting or splicing.
Bend-Insensitive Fiber Glass (G.657 / BIMMF)
Equipped with bend-insensitive glass cores, modern LC to LC patch cords can be routed tightly around cable management arms (down to a 7.5mm bend radius) with zero optical attenuation penalty.
LC to LC Fiber Cable Configurations
| Cable Configuration | Glass Fiber Grade | Outer Diameter & Jacket | Primary Deployment Application |
|---|---|---|---|
| Duplex LC-LC Uniboot | OM4 Multimode (Aqua / Violet) | 2.0 mm Single Round (LSZH) | High-density 10G/40G/100G server rack Top-of-Rack patching |
| Duplex LC-LC Singlemode | OS2 Low Water Peak (Yellow) | 2.0 mm Uniboot (OFNP Plenum) | Interconnecting 10GBASE-LR & 100G-LR4 optical switch transceivers |
| Duplex LC-LC Zipcord | OM3 Laser-Optimized (Aqua) | 2.8 mm x 5.6 mm Figure-8 | Standard enterprise wiring closets and telecom distribution racks |
| Armored Stainless LC-LC | OS2 / OM3 (Blue / Gray) | 3.0 mm Helical Steel Armored | Harsh industrial manufacturing floors and broadcasting trucks |
Real-World Application Scenarios
Server rack Top-of-Rack switch patching, enterprise SAN fiber channel storage connections, telecom central office cross-connects, and pro-AV active optical routing.
Recommended Internal Resources
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Frequently Asked Questions (FAQ)
Q: What should I do if my LC to LC fiber cable fails to establish a network link?
A: Check the polarity; if the transmit laser is connecting to another transmit laser, use the uniboot clip to swap the A and B fiber positions at one end to restore the link.
Q: Can I use an LC to LC multimode cord with singlemode transceivers?
A: No; multimode 50µm fibers cannot properly couple light into microscopic 9µm singlemode transceivers, resulting in massive optical loss (over 20dB) and link failure.