​​Defining the CB-LC-LC-SMF7M=​​

The ​​CB-LC-LC-SMF7M=​​ is a Cisco-certified ​​single-mode fiber optic patch cable​​ featuring LC duplex connectors on both ends. Engineered for high-speed, long-distance data transmission, it supports applications requiring minimal signal loss over spans up to ​​10 kilometers​​, making it indispensable for enterprise and telecom networks.

​​Core Technical Specifications​​

• ​​Fiber Type​​: ​​OS2 9/125μm​​ single-mode fiber (SMF), optimized for ​​1310nm and 1550nm​​ wavelengths.
• ​​Cable Length​​: 7 meters (23 feet), ideal for intra-rack or adjacent rack connections.
• ​​Connectors​​: ​​LC-LC duplex​​ with APC (Angled Physical Contact) polish for reduced back reflection.
• ​​Attenuation​​: ≤0.4 dB/km, ensuring reliable performance in high-bandwidth scenarios.
• ​​Compliance​​: Meets ​​ITU-T G.652.D​​ and ​​TIA-598-D​​ standards for optical performance.

​​Compatibility and Target Use Cases​​

​​Supported Cisco Devices​​:

• ​​Nexus 9000 Series Switches​​: For data center spine-leaf architectures.
• ​​ASR 9000 Series Routers​​: Long-haul service provider backbones.
• ​​Cisco ONS 15454 DWDM Systems​​: Dense wavelength division multiplexing deployments.

​​Typical Applications​​:

• ​​Metro-Ethernet Links​​: Connecting geographically dispersed offices.
• ​​FTTH (Fiber-to-the-Home)​​: Backhauling traffic from aggregation nodes.
• ​​Cloud Interconnects​​: Linking data centers over dark fiber.

​​Why Single-Mode Fiber Outperforms Multimode​​

• ​​Longer Reach​​: Supports distances up to 80km with appropriate transceivers (e.g., ​​QSFP-100G-ZR4-S​​).
• ​​Higher Bandwidth​​: Virtually unlimited capacity compared to OM3/OM4 MMF.
• ​​Future-Proofing​​: Ready for 100G/400G upgrades without re-cabling.

​​Purchasing Genuine CB-LC-LC-SMF7M= Cables​​

For guaranteed compatibility and performance, purchase through ​​itmall.sale​​, which offers:

• ​​Cisco Warranty Coverage​​: Protection against manufacturing defects.
• ​​Bulk Discounts​​: Cost-effective for large-scale deployments.
• ​​Authenticity Assurance​​: Avoid counterfeit cables risking signal degradation.

​​Addressing Key User Concerns​​

​​Q: Can this cable support 40G/100G speeds?​​
A: Yes—pair with ​​QSFP28/QSFP-DD​​ transceivers like ​​QSFP-100G-LR4-S​​.

​​Q: Is APC polish necessary for all SMF links?​​
A: Critical for RF-over-fiber (e.g., CATV) and DWDM systems. UPC is sufficient for standard Ethernet.

​​Q: How does OS2 differ from OS1?​​
A: OS2 has lower attenuation (0.4dB/km vs. 1.0dB/km) and supports longer distances.

​​Final Insight​​

The CB-LC-LC-SMF7M= isn’t just another cable—it’s the lifeline of modern high-speed networks. While multimode fiber suffices for short leaps, single-mode’s reach and scalability make it irreplaceable for enterprises eyeing future growth. Skimping on certified SMF cables might save pennies today but could cost millions in downtime or upgrades tomorrow. In networking, cutting corners is never an option.