Cisco GLC-FE-100FX Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 100BASE-FX SFP Fast Ethernet Optical Transceiver Module
SKU:GLC-FE-100FX
Naming Breakdown
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GLC: Small Form-Factor Pluggable Transceiver(SFP/mini-GBIC)
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FE: Fast Ethernet(100 Mbps) operation
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100FX: 100BASE-FX over multimode fiber
Core Product Positioning
The Cisco GLC-FE-100FX is a hot‑swappable SFP transceiver compliant with IEEE 802.3u 100BASE-FX. It delivers full-duplex 100 Mbps Fast Ethernet fiber connectivity over multimode fiber. This module works inFast Ethernet SFP ports or dual-rate Fast/Gigabit SFP portson Cisco switches and routers. It reuses legacy multimode fiber cabling for Fast Ethernet uplinks and inter-switch links, supporting investment protection for existing campus network infrastructure.
2. Hardware & Software Compatibility
Supported Host Platforms
Cisco Catalyst 2960, 3560, 3650, 3750, 3850, 4500, 6500, 6800; ISR 1100/4000 Series; ASR 1000; Wireless Controllers; Firepower appliances equipped with Fast Ethernet or dual-rate SFP slots.
Supported IOS / IOS XE Versions
All mainstream Cisco IOS and IOS XE releases supporting 100BASE SFP transceivers.
Supported Fiber Type
Multimode Fiber(OM1/OM2, 62.5μm / 50μm) only; incompatible with single-mode fiber.
Unsupported Platforms
Pure Gigabit-only SFP ports(use GLC-GE-100FX instead), SFP+/SFP28/QSFP ports without adapters, MDS storage switches.
Critical Note: This module operates at 100 Mbps only; it cannot negotiate to 1 Gbps.
3. Physical & Optical Performance Specifications
Form Factor
Hot‑swappable SFP(mini‑GBIC) compliant with SFP MSA
Optical Interface
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Nominal Wavelength: 1310 nm (FP Laser)
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Connector: Duplex LC
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Data Rate: 100 Mbps wire‑speed Fast Ethernet
Maximum Transmission Reach
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OM1/OM2 Multimode Fiber: Up to2 km
Optical Power Budget
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Transmit Power: -12.5 dBm ~ -3 dBm
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Receiver Sensitivity: Minimum -31 dBm
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Maximum Allowable Received Power: 0 dBm
Digital Diagnostics
DOM / DDM (Digital Diagnostic Monitoring) Supported
Monitors module temperature, supply voltage, laser bias current, transmit optical power, receive optical power.
Environmental Operating Parameters (Commercial Grade)
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Operating Temperature:0°C ~ +70°C (32°F ~ 158°F)
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Storage Temperature: -40°C ~ +85°C (-40°F ~ 185°F)
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Relative Humidity: 10% – 90%, non‑condensing
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Maximum operating altitude: 3,000 meters
Typical Power Consumption
4. Supported Functional Capabilities
Ethernet Transport
100 Mbps full‑duplex operation, 4b/5b line coding
Layer 2 Protocol Support
802.1Q VLAN trunking, 802.3x pause frame flow control, LACP, STP/RSTP/MSTP, EtherChannel link aggregation
Interface Diagnostics
Link status detection, packet error counters, DOM real-time optical telemetry, local loopback testing
High Availability
OIR hot‑swap capability on supported chassis; link redundancy via spanning tree or port channels
Operations & Management
IOS / IOS XE CLI, SSH, SNMP v2c/v3, Syslog logging, DOM optical parameter polling
5. Typical Deployment Scenarios
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Inter-building Fast Ethernet fiber links over multimode fiber within 2 km
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Legacy campus network uplinks utilizing existing multimode fiber infrastructure
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Industrial and building access network 100Mbps fiber uplink deployments
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Branch office Fast Ethernet fiber connectivity
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Spare replacement transceiver for SFP‑based Cisco enterprise switching and routing environments
6. Regulatory & Compliance Certifications
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Safety Standards: UL 60950‑1, IEC/EN 60950‑1, CSA C22.2 No.60950‑1
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EMC Compliance: CE Mark, FCC Part 15 Class A, ICES‑003 Class A, VCCI Class A
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Laser Safety: Class 1 Laser Product per IEC 60825‑1
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Standards: IEEE 802.3u, SFP MSA, SFF‑8472
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Environmental: RoHS compliant, WEEE directive compliant
7. Standard Factory Package Contents
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Cisco GLC-FE-100FX 100BASE‑FX SFP Optical Transceiver
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Hardware installation guide
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Safety and regulatory documentation
Note: Duplex LC multimode fiber patch cables are sold separately.
End-of-Sale Status
Cisco GLC-FE-100FX remains active and available for ordering.
Critical Model Distinction
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GLC-FE-100FX: For Fast Ethernet / dual-rate SFP ports(100Mbps)
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GLC-GE-100FX: For pure Gigabit-only SFP ports(100Mbps)
UNSPSC Classification Code
43222618 – Cisco GLC-FE-100FX 100BASE-FX SFP multimode fiber transceiver with DOM, hot‑swappable 100Mbps Fast Ethernet fiber module for Cisco Fast Ethernet and dual-rate SFP ports on enterprise switches and routers.
Hardware Warranty
Original Cisco units carry Cisco limited hardware warranty; refurbished units follow reseller warranty terms.
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