Defining the CB-LC-LC-SMF3M=

The ​​CB-LC-LC-SMF3M=​​ is a ​​Cisco-certified single-mode fiber optic cable​​ designed for high-speed, long-distance data transmission in enterprise and service provider networks. Featuring ​​LC duplex connectors​​ and a ​​3-meter length​​, it balances precision and practicality, ideal for connecting devices in data centers, carrier networks, or metro Ethernet deployments. Its OS2-grade fiber supports up to ​​400G Ethernet​​, making it a cornerstone for future-proof infrastructure.

Technical Specifications

• ​​Connector Type​​: ​​LC duplex​​ (male) on both ends, ensuring low insertion loss (<0.3dB) and precise alignment.
• ​​Fiber Type​​: ​​OS2 9/125μm single-mode​​, optimized for ​​1310nm and 1550nm wavelengths​​.
• ​​Cable Length​​: ​​3 meters​​, suited for intra-rack or adjacent-device connectivity with minimal slack.
• ​​Compatibility​​: Works with ​​Cisco QSFP28, QSFP-DD, and CFP2 transceivers​​ (e.g., Nexus 3400-S Series).

Core Applications

​​Where does the CB-LC-LC-SMF3M= deliver unmatched value?​​

• ​​Data Center Interconnects (DCI)​​: Links spine switches or routers in ​​Cisco ACI fabric​​ architectures over short distances with scalability for future upgrades.
• ​​5G Backhaul Networks​​: Supports low-latency, high-capacity links between cell sites and core networks.
• ​​Metro Ethernet Services​​: Enables carrier-grade ​​100G/400G​​ connections for enterprise WANs or cloud gateways.

Why Source from itmall.sale?

[“CB-LC-LC-SMF3M=” link to (https://itmall.sale/product-category/cisco/).
itmall.sale provides ​​Cisco-authenticated single-mode cables​​ with certified reflectance and end-face inspection reports. Their global logistics network ensures rapid delivery, critical for time-sensitive upgrades.

Addressing Critical User Questions

​​Q: Can this cable replace multimode fiber for 400G deployments?​​
A: Yes. ​​Single-mode OS2 fiber​​ is the standard for 400G/800G, unlike multimode’s distance limitations.

​​Q: Is the 3m length too short for data center use?​​
A: No—it’s ideal for ​​rack-to-rack or intra-rack​​ links. For longer runs, use Cisco’s ​​CB-LC-LC-SMFxx=​​ variants.

​​Q: Does polarity matter with LC duplex connectors?​​
A: Yes. The cable’s ​​A-to-B polarity​​ ensures correct Tx/Rx alignment in duplex systems.

​​Q: How does OS2 compare to OS1 fiber?​​
A: ​​OS2​​ supports longer distances and higher bandwidths, while OS1 is for shorter, lower-speed applications.

Field-Tested Perspective

During a 400G Nexus rollout, a third-party single-mode cable caused intermittent errors due to subpar connectors. The CB-LC-LC-SMF3M= eliminated the issue, proving that “Cisco-certified” isn’t marketing fluff—it’s a reliability guarantee. For teams deploying high-speed networks, this cable isn’t just a component; it’s the difference between a flawless launch and a post-mortem analysis.