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Understanding the GLC-FE-T-I= Transceiver
The GLC-FE-T-I= is a Cisco 1000BASE-T Small Form-Factor Pluggable (SFP) transceiver designed for copper Ethernet connectivity. Unlike fiber modules, this hot-swappable device uses RJ-45 interfaces to deliver Gigabit Ethernet over Cat5e/Cat6 twisted-pair cabling. Key specifications include:
- Max Speed: 1 Gbps at 1000BASE-T
- Wavelength: N/A (copper-based)
- Max Distance: 100 meters (328 feet)
- Operating Temperature: Commercial (0°C to 70°C)
- Compliance: MSA-compliant, Cisco-coded
Technical Differentiation: GLC-FE-T-I= vs. Similar Modules
A common confusion arises between the GLC-FE-T-I= and fiber SFP variants like the GLC-LH-SMD or GLC-SX-MM. Critical distinctions:
| Feature | GLC-FE-T-I= | Fiber SFPs |
|---|---|---|
| Media Type | Copper (RJ-45) | Fiber (LC/SC connectors) |
| Deployment Cost | Lower (uses existing cabling) | Higher (requires fiber optics) |
| Latency | <0.1 μs | Varies by fiber type |
| EMI Resistance | Moderate | High (immune to interference) |
Compatibility: Which Cisco Devices Support GLC-FE-T-I=?
This transceiver works with Cisco switches and routers featuring SFP slots. Verified compatible platforms include:
- Catalyst 2960-X/XR, 3560-X, 3850
- ISR 4000 Series Routers
- Nexus 3048, 3064 switches
Critical note: The “-I=” suffix indicates international regulatory compliance (e.g., CE, FCC), making it suitable for global deployments.
Key Use Cases and Deployment Scenarios
1. Office LAN Backbone Connectivity
The GLC-FE-T-I= is ideal for connecting access switches to distribution layers in environments with pre-installed copper cabling. Its plug-and-play design simplifies upgrades without infrastructure overhauls.
2. Cost-Sensitive Edge Deployments
For small branches or retail sites requiring Gigabit uplinks, this transceiver avoids the expense of fiber trenching. A single module costs ~65% less than comparable 1000BASE-SX optics.
3. Temporary Network Expansions
Deploy it in pop-up data centers or event networks where fiber installation isn’t feasible.
Troubleshooting Common Issues
“Transceiver Not Detected” Errors
- Cause: Non-Cisco-coded SFPs may trigger compatibility locks.
- Fix: Use the
service unsupported-transceivercommand (at your own risk) or procure Cisco-authorized modules.
Link Flapping at 1 Gbps
- Cause: Damaged cabling or exceeding 100-meter limits.
- Fix: Test with a certified Cat6 cable and shorten runs.
Why Temperature Range Matters
The GLC-FE-T-I= operates in commercial (0°C to 70°C) environments. For industrial settings (e.g., factories with >70°C ambient temps), opt for industrial-grade modules like GLC-FE-T-I=-IN.
Where to Source Authentic GLC-FE-T-I= Modules
Counterfeit SFPs remain a critical concern. For guaranteed Cisco-compatible optics, purchase from authorized resellers.
Visit itmall.sale’s Cisco transceiver inventory for verified GLC-FE-T-I= stock.
Final Insights: When to Choose Copper SFPs
While fiber dominates high-speed backbones, copper SFPs like the GLC-FE-T-I= fill a vital niche. They’re indispensable for retrofitting legacy networks, reducing CapEx in edge deployments, and ensuring rapid deployment flexibility. However, prioritize fiber for latency-sensitive applications (e.g., HFT) or environments with heavy EMI. The GLC-FE-T-I= isn’t revolutionary—it’s a pragmatic tool for specific, real-world needs.