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Fiber Optic Cable Interface LC Type

Optical access and telecom site reference Published 23 Feb 2026

Use this reference to prepare product questions for CGWEB NETWORKS. Check interfaces, capacity, protection and installation requirements against the current product documentation.

LC interfaces typically use single-mode (OS2) or multimode (OM3/OM4/OM5) fiber optic cables in simplex or duplex configurations with UPC or APC polish.

Overview of L

C Fiber Optic CablesLC (Lucent Connector) is a small form factor (SFF) fiber optic connector widely used in data centers, enterprise networks, and telecom systems due to its compact size and high-density capability.

L

C connectors feature a 1. 25 mm ceramic ferrule and a push-pull latch mechanism, making them suitable for high-density patch panels and transceiver connections. Compatible Fiber TypesSingle-mode fiber (OS2): Used for long-distance transmission and high-speed networks, typically paired with LC connectors for 10G, 25G, 100G, and higher duplex links.

Multimode fiber (OM3, OM4, OM5): Used for shorter distances, such as within data centers, supporting high-speed duplex connections with LC interfaces. Connector Polish TypesUPC (Ultra Physical Contact): Flat polish, commonly used for digital and data transmission, providing low insertion loss and moderate return loss.

AP

C (Angled Physical Contact): 8-degree angled polish, minimizing back reflection, ideal for high-frequency, CATV, or PON applications.

Cable Configurations

Simplex: Single fiber per cable, used for one-way transmission. Duplex: Two fibers per cable, supporting bidirectional communication, which is the most common configuration for LC interfaces in modern networks. Special VariantsUltra-low loss LC cables: Optimized for minimal insertion loss (as low as 0.

12 dB) and high performance in critical applications.

Armored L

C patch cables: Provide additional protection against physical damage while maintaining flexibility.

Mode-conditioning L

C cables: Combine multimode and single-mode fibers for specific calibration needs in legacy or mixed-mode networks. In summary, LC interfaces are compatible with both single-mode and multimode fiber optic cables, typically in duplex format, with UPC or APC polish, making them versatile for high-density, high-speed network deployments. Proper selection of fiber type, polish, and configuration ensures optimal performance and minimal signal loss.

Fiber Optic Cable Interface LC Type - CGWEB NETWORK INFRASTRUCTURE [PDF]

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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