Cisco C9200L-24PXG2Y-EDU Switch: What Is It,
Key Features of the C9200L-24PXG2Y-EDU The Cisco ...
Overview: Unpacking the GLC-FE-100BX-D48= SFP Module
The Cisco GLC-FE-100BX-D48= is a 100BASE-BX10-D Fast Ethernet SFP transceiver optimized for single-mode fiber (SMF) networks. Designed for bidirectional (BiDi) communication over a single fiber strand, it uses 1490 nm TX / 1310 nm RX wavelengths to achieve 10 km reach, making it ideal for cost-sensitive deployments where fiber availability is limited. Cisco’s official product documentation confirms this module is Cisco-branded, ensuring compliance with strict firmware and compatibility standards.
Technical Specifications and Key Differentiators
Cisco’s datasheets highlight the GLC-FE-100BX-D48=’s core capabilities:
- Data Rate: 100 Mbps (Fast Ethernet).
- Fiber Type: Single-mode (SMF), 9/125 µm core/cladding.
- DOM Support: Digital Optical Monitoring for real-time diagnostics (voltage, temperature, TX/RX power).
- Power Consumption: 0.8W (typical).
Performance Comparison
| Feature | GLC-FE-100BX-D48= | Standard 100BASE-LX SFP |
|---|---|---|
| Fiber Strands Required | 1 | 2 |
| Max Distance | 10 km | 10 km |
| Wavelength Efficiency | BiDi | Dual-channel |
Compatibility: Supported Cisco Devices
The module is validated for:
- Catalyst Switches: 2960-S, 3560-X, 3750-X, 4500-E.
- ISR Routers: 1900, 2900, 3900 Series.
- Industrial Ethernet Switches: IE-2000, IE-3000 Series.
Cisco’s compatibility matrix explicitly warns against using third-party SFPs in Cisco Nexus 9000 switches due to firmware incompatibilities.
Primary Use Cases and Deployment Scenarios
1. Legacy Network Upgrades
Organizations migrating from copper to fiber backbones leverage the GLC-FE-100BX-D48= to extend the lifespan of Fast Ethernet devices while reducing cabling costs.
2. Telecom Backhaul Links
Telecom operators use BiDi SFPs to maximize existing fiber infrastructure in rural or low-density areas.
3. Industrial IoT Deployments
With an operating temperature range of -40°C to 85°C, the module suits harsh environments like oil refineries or transportation systems.
User Concerns Addressed
Q: Can this SFP support Gigabit Ethernet?
No. The “FE” designation confirms it’s limited to 100 Mbps Fast Ethernet. For Gigabit needs, consider the GLC-BX40-D or similar.
Q: Does it work with multimode fiber?
No. The GLC-FE-100BX-D48= is engineered exclusively for single-mode fiber (SMF).
Q: How to troubleshoot link instability?
Ensure TX/RX wavelength alignment on both ends. For example, pair a GLC-FE-100BX-D48= (1490 nm TX) with a GLC-FE-100BX-U48= (1310 nm TX).
Best Practices for Deployment
- Link Budget Calculation: Total fiber loss (connectors + splices + distance) must stay below 12 dB for stable operation.
- Clean Fiber Connectors: Use lint-free wipes and IPA to prevent contamination-induced signal loss.
- Firmware Updates: Regularly sync with Cisco Software Center to patch vulnerabilities.
For procurement, visit the [“GLC-FE-100BX-D48=” link to (https://itmall.sale/product-category/cisco/).
Why This SFP Still Matters in a Gigabit World
Having deployed BiDi SFPs in legacy-heavy industries like utilities and manufacturing, the GLC-FE-100BX-D48= fills a niche that higher-speed modules can’t. While Gigabit and 10G dominate modern networks, many industrial control systems (ICS) and SCADA environments still rely on Fast Ethernet for compatibility with decades-old machinery. Cisco’s decision to retain this module in its portfolio underscores a pragmatic approach to hybrid infrastructure. For engineers balancing modernization with budget constraints, the GLC-FE-100BX-D48= isn’t just a transceiver—it’s a bridge between legacy investments and future-ready architectures.
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