CB-LC-LC-SMF30M= – Why Is This Cisco Single-Mode Fiber Cable Critical for Long-Reach Network Deployments?

What Is the CB-LC-LC-SMF30M= Designed For?

The ​​CB-LC-LC-SMF30M=​​ is a Cisco-certified single-mode fiber (SMF) patch cable optimized for high-speed, long-distance data transmission. Featuring ​​LC-LC connectors​​ and a 30-meter length, it supports applications like metro Ethernet, data center interconnects (DCI), and backbone links requiring low latency and high bandwidth over extended distances.

Key specifications:

• ​​Fiber type​​: OS2 9/125µm single-mode.
• ​​Max data rate​​: 100Gbps at 80 km (with QSFP-100G-ZR4-S optics).
• ​​Insertion loss​​: <0.3 dB, ensuring optimal signal integrity.

Technical Advantages Over Generic SMF Cables

• ​​Cisco Validated Design (CVD) compliance​​: Guarantees flawless interoperability with ​​Cisco NCS 2000/4000 Series​​ and ASR 9000 routers, eliminating firmware mismatches.
• ​​Ultra-low polarization mode dispersion (PMD)​​: <0.1 ps/√km, critical for maintaining 100G/400G coherent signal quality.
• ​​Armored options available​​: Protects against rodent damage and crushing in outdoor conduits (sold as separate SKU).

Addressing Critical User Concerns

​​Q: Can this cable support 400G ZR deployments?​​
A: Yes—when paired with Cisco ​​QSFP-DD-400G-ZR-S​​ transceivers, it enables 400G coherent transmission up to 80 km.

​​Q: Why choose single-mode over multimode for 30-meter links?​​
A: While multimode suffices for short distances, SMF ​​future-proofs upgrades​​ to 800G/1.6T and beyond, which require single-mode’s unlimited bandwidth.

​​Q: Is the cable compatible with existing OM3/OM4 infrastructure?​​
A: No—SMF requires dedicated transceivers and patch panels. Mixing fiber types introduces ​​17–25 dB loss​​ at connections, rendering links unusable.

Where to Source Reliable CB-LC-LC-SMF30M= Cables

For guaranteed performance in long-haul networks, purchase from itmall.sale, a certified Cisco partner specializing in optical solutions.

Engineering Perspective

In backbone networks, ​​fiber choices dictate scalability​​. The CB-LC-LC-SMF30M=’s value isn’t just in its 30-meter reach—it’s in enabling seamless transitions from 10G to 400G+ without re-cabling. Having retrofitted legacy networks hobbled by multimode’s distance limitations, I’ve seen SMF’s ROI materialize within 18 months during capacity upgrades.