CAB-PWR-AC2J=: Why Is It Mandatory for Cisco
Core Specifications and Regional Compliance The C...
What Is the CB-LC-LC-MMF30M= Cable?
The CB-LC-LC-MMF30M= is a 30-meter multimode fiber (MMF) optic cable with LC duplex connectors on both ends, designed for high-speed, short-range connectivity in Cisco networks. It supports 10G/40G/100G Ethernet and is optimized for use in data centers, enterprise backbone links, or campus networks where cost-effective, high-bandwidth solutions are critical.
Key Technical Specifications
- Fiber Type: OM3/OM4 multimode (50/125µm), backward-compatible with 1G/10G standards.
- Wavelength Support: 850nm (primary) and 1300nm (secondary).
- Max Distance: 100m at 40G (QSFP+) / 150m at 10G (SFP+) when using OM4 fiber.
- Connectors: LC-LC duplex, polished for low insertion loss (<0.3dB).
- Cable Jacket: OFNR-rated (plenum) for fire safety in air-handling spaces.
CB-LC-LC-MMF30M= vs. Single-Mode Fiber: When to Choose Which
| Factor | CB-LC-LC-MMF30M= (MMF) | Single-Mode Fiber (SMF) |
|---|---|---|
| Distance Range | Up to 400m (OM4, 40G) | 10km+ (10GBase-LR) |
| Cost | Lower (cheaper transceivers) | Higher (laser components) |
| Use Case | Intra-building/data center | Long-haul telecom/metro |
| Power Consumption | Lower (VCSEL-based optics) | Higher (laser diodes) |
Why 30 Meters Matters in Multimode Deployments
- Data Center ToR/MoR Links: Connects top-of-rack (ToR) switches to middle-of-rack (MoR) servers without excess slack.
- Cost Efficiency: Avoids overspending on single-mode optics for short runs where MMF suffices.
- Future-Proofing: OM4’s 4700 MHz·km bandwidth supports 100G upgrades via parallel optics (e.g., Cisco QSFP28).
For Cisco-certified performance, purchase from authorized suppliers like [“CB-LC-LC-MMF30M=” link to (https://itmall.sale/product-category/cisco/).
Practical Deployment Insight
In a recent warehouse automation project, the CB-LC-LC-MMF30M=’s 30M length proved ideal for linking Cisco Nexus 9300 switches to IoT control panels spaced 25 meters apart. Single-mode was overkill, while shorter cables would’ve forced costly re-cabling. One caveat: Always verify fiber cleanliness—dust caps are essential in dusty environments. I’ve seen OM4’s theoretical 150m 10G range drop to 80m due to contaminated connectors. Proper handling matters as much as the cable itself.