Cisco 100 Megabit Transceiver GLC-FE-100BX-U
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In today's evolving enterprise networking landscape, modern business operations rely heavily on flexible, scalable, and dependable infrastructure solutions. Cisco Fast Ethernet Small Form-Factor Pluggable (SFP) transceiver modules represent a crucial component in maintaining seamless network interconnectivity across diverse commercial environments. These hot-swappable optical and copper modules easily bridge the gap between network switches and routers without requiring expensive system re-architecting.
By offering a modular approach to network expansion, Cisco SFPs allow commercial IT leaders to optimize capital expenditure while maintaining maximum operational uptime. Organizations can dynamically scale bandwidth, adapt to changing medium requirements, and maintain high performance across enterprise campuses and remote sites.
Product overview
Cisco provides a comprehensive portfolio of Fast Ethernet SFP transceiver modules engineered for various reach requirements, optical media, and physical environments. For short-distance multimode fiber (MMF) connections up to 2 km, the 100BASE-FX standard is covered by models including GLC-FE-100FX, dual-rate GLC-GE-100FX, and ruggedized GLC-FE-100FX-RGD. Standard single-mode fiber (SMF) connections extending up to 10 km are handled by 100BASE-LX10 transceivers, including GLC-FE-100LX and the industrial-grade GLC-FE-100LX-RGD.
To optimize fiber usage, Cisco offers single-strand bidirectional 100BASE-BX10 modules, featuring the GLC-FE-100BX-D and GLC-FE-100BX-U pair supporting 10 km spans. For longer optical reaches, the lineup includes 100BASE-EX SFP (GLC-FE-100EX) for distances up to 40 km, and 100BASE-ZX SFP (GLC-FE-100ZX) for long-haul links reaching up to 80 km on SMF.
Copper-based network segments are supported by the 100BASE-T SFP (GLC-FE-100T), delivering Fast Ethernet over Category 5 copper cables up to 100 meters. Furthermore, specialized industrial ruggedized variants (-RGD models) ensure reliable connectivity in extended temperature ranges and severe operating environments.
Features and benefits
• Hot-Swappable Design: Allows seamless module installation or replacement without taking network devices offline, preserving operational productivity.
• Wide Distance Coverage: Offers flexible options ranging from 100-meter copper spans up to 80-kilometer long-haul single-mode optical links.
• Bidirectional Fiber Optimization: The 100BASE-BX10 units maximize existing cable infrastructure by doubling capacity over a single fiber strand.
• Digital Optical Monitoring (DOM): Delivers real-time diagnostic insight, enabling proactive management of optical link performance and health.
• Industrial-Grade Reliability: Specialized ruggedized modules (-RGD) guarantee stable performance in harsh operating temperatures and challenging conditions.
• Industry Standards Compliance: Fully compliant with IEEE 802.3u standards and MSA, ensuring seamless interoperability across Cisco networking hardware.
Product overview
The Cisco® 100BASE-X Small Form-Factor Pluggable (SFP) device (Figure 1) is a hot-swappable input/output device that plugs into Fast Ethernet ports, dual-rate Fast/Gigabit Ethernet ports, or Gigabit Ethernet ports of a Cisco switch or router, linking the port with the fiber cabling network.
Main features include the following:
● Hot-swappable when deployed, the switch or router does not have to reboot
● Supports the “pay-as-you-populate” model
● Interchangeable with other 100BASE-X SFPs on the same line card
● Supports the Cisco quality ID feature that enables the switch or router to identify whether or not the SFP is a Cisco qualified SFP
● Optically interoperable with respective 100BASE-X Ethernet interfaces on the same link
Cisco 100M Ethernet SFP
Cisco 100BASE-FX SFP
The Cisco 100BASE-FX SFP operates on ordinary multimode fiber-optic (MMF) link spans up to 2 kilometers (km) long.
GLC-FE-100FX modules operate in Fast Ethernet or dual-rate Fast/Gigabit Ethernet ports of Cisco switches and routers.
GLC-FE-100FX-RGD modules operate in Fast Ethernet or dual-rate Fast/Gigabit Ethernet ports of Cisco Industrial Ethernet and SmartGrid switches and routers.
GLC-GE-100FX modules operate in Gigabit Ethernet ports of Cisco switches and routers. GLC-GE-100FX is not compatible with any media converter, NIC, nor 3rd party product.
Cisco 100BASE-LX10 SFP
The Cisco 100BASE-LX10 SFP operates on ordinary single-mode fiber-optic (SMF) link spans up to 10 km long.
GLC-FE-100LX modules operate in Fast Ethernet or dual-rate Fast/Gigabit Ethernet ports of Cisco switches and routers.
GLC-FE-100LX-RGD modules operate in Fast Ethernet or dual-rate Fast/Gigabit Ethernet ports of Cisco Industrial Ethernet and SmartGrid switches and routers.
Cisco 100BASE-BX10 SFP
The Cisco 100BASE-BX10 (part numbers GLC-FE-100BX-D and GLC-FE-100BX-U) SFPs operate on ordinary SMF single-strand link spans up to 10 km long. A 100BASE-BX10-D device is always connected a 100BASE-BX10-U device with a single strand of standard SMF with an operating transmission range up to 10 km. The communication over a single strand of fiber is achieved by separating the transmission wavelength of the two devices as depicted in Figure 2. 100BASE-BX10-D transmits a 1550-nm channel and receives a 1310-nm signal, whereas a 100BASE-BX10-U transmits a 1310-nm wavelength and receives a 1550-nm signal. Note in Figure 2 the presence of a Wavelength-Division Multiplexing (WDM) splitter integrated into the SFP to split the 1310-nm and 1550-nm light paths.
Bidirectional Transmission on a Single Strand of SMF
Cisco 100BASE-EX SFP
The Cisco 100BASE-EX SFP operates on ordinary SMF link spans up to 40 km long.
GLC-FE-100EX modules operate in Fast Ethernet or dual-rate Fast/Gigabit Ethernet ports of Cisco switches and routers.
Cisco 100BASE-ZX SFP
The Cisco 100BASE-ZX SFP operates on ordinary SMF link spans up to 80 km long.
GLC-FE-100ZX modules operate in Fast Ethernet or dual-rate Fast/Gigabit Ethernet ports of Cisco switches and routers.
Cisco 100BASE-T Copper SFP
The 100BASE-T SFP operates on standard Category 5 unshielded twisted-pair copper cabling of link lengths up to 100 m (328 ft). It supports Industrial temperature range of -40 to 85C.
Technical specifications
Platform Support
The Cisco SFPs are supported across a variety of Cisco switches, routers, and optical transport devices. For more details, refer to the document Cisco 100M Ethernet SFP Compatibility Matrix.
Connectors and Cabling
Connectors: Dual LC connector (GLC-FE-100FX, GLC-FE-100FX-RGD, GLC-GE-100FX, GLC-FE-100LX, GLC FE-100LX-RGD, GLC-FE-100EX, and GLC-FE-100ZX) or single LC connector (GLC-FE-100BX-D and GLC FE-100BX-U).
Table 1 provides cabling specifications for the SFPs for installation in a Fast Ethernet SFP port. Note that all SFP ports have LC-type connectors, and the minimum cable distance for all SFPs listed (MMF and SMF [G.652]) is 2 meters (6.5 feet).
Table 1. SFP Port cabling specifications
| SFP |
Wavelength (nm) |
Fiber Type |
Cable Distance |
| GLC-FE-100FX GLC-FE-100FX-RGD GLC-GE-100FX |
1300 |
MMF |
2 km (6,562 ft) |
| GLC-FE-100LX GLC-FE-100LX-RGD |
1310 |
SMF |
10 km (32,810 ft) |
| GLC-FE-100BX-U |
1310 |
SMF |
10 km (32,810 ft) |
| GLC-FE-100BX-D |
1550 |
SMF |
10 km (32,810 ft) |
| GLC-FE-100EX |
1310 |
SMF |
40 km (131,240 ft) |
| GLC-FE-100ZX |
1550 |
SMF |
80 km (262,480 ft) |
Table 2 gives information about fiber loss.
Table 2. Fiber-loss budgets
| SFP |
Type |
Transmit (dBm) |
Receive (dBm) |
||
| Maximum |
Minimum |
Maximum |
Minimum |
||
| GLC-FE-100FX GLC-FE-100FX-RGD GLC-GE-100FX |
100BASE-FX |
-14 |
-20 |
-14 |
-31 |
| GLC-FE-100LX GLC-FE-100LX-RGD |
100BASE-LX10 |
-8 |
-15 |
-8 |
-28 |
| GLC-FE-100BX-U |
100BASE-BX10-U |
-8 |
-14 |
-3 |
-28.2 |
| GLC-FE-100BX-D |
100BASE-BX10-D |
-8 |
-14 |
-3 |
-28.2 |
| GLC-FE-100EX |
100BASE-EX |
0 |
-5 |
-8 |
-28 |
| GLC-FE-100ZX |
100BASE-ZX |
2 |
-3 |
-8 |
-30 |
Dimensions
Dimensions (H x W x D): 8.5 x 13.4 x 56.5 mm
Environmental Conditions and Power Requirements
● Operating temperature range:
◦ Commercial temperature range (COM): 0 to 70°C (32 to 158°F), applicable to GLC-GE-100FX, GLC-FE-100BX-D, GLC-FE-100BX-U, and GLC FE 100ZX
◦ Extended temperature range (EXT): -5 to 85°C (23 to 185°F) applicable to GLC-FE-100FX, GLC-FE-100LX and GLC-FE-100-EX
◦ Industrial temperature range (IND): -40 to 85°C (-40 to 185°F), applicable to GLC-FE-100FX-RGD, GLC-FE-100LX-RGD and GLC-FE-T-I
● Storage temperature range: -40 to 85°C (-40 to 185°F)
● Power consumption:
◦ GLC-FE-100FX, GLC-FE-100FX-RGD, GLC-FE-100BX-D, GLC-FE-100BX-U, GLC-FE-100EX, and GLC-FE-100ZX modules consume up to 1W per port
◦ GLC-GE-100FX modules typically consume 1.5W per port (up to 1.7W)
◦ GLC-FE-T-I modules typically consume 1W per port
Ordering information
Table 3 gives ordering information for the Cisco SFP.
Table 3. Ordering Cisco SFP
| Product Number |
SFP |
| GLC-FE-100FX |
100BASE-FX SFP for Fast Ethernet SFP Ports |
| GLC-FE-100FX-RGD |
100BASE-FX Rugged SFP for Fast Ethernet SFP Ports |
| GLC-GE-100FX |
100BASE-FX SFP for Gigabit Ethernet SFP Ports |
| GLC-FE-100LX |
100BASE-LX10 SFP for Fast Ethernet SFP Ports |
| GLC-FE-100LX-RGD |
100BASE-LX10 Rugged SFP for Fast Ethernet SFP Ports |
| GLC-FE-100BX-U |
100BASE-BX10-U SFP for Fast Ethernet SFP Ports |
| GLC-FE-100BX-D |
100BASE-BX10-D SFP for Fast Ethernet SFP Ports |
| GLC-FE-100EX |
100BASE-EX for Fast Ethernet SFP Ports |
| GLC-FE-100ZX |
100BASE-ZX for Fast Ethernet SFP Ports |
| GLC-FE-T-I |
100BASE-T for Fast Ethernet SFP Ports |
Regulatory and Standards Compliance
Safety
● Laser Class 1 21CFR1040 LN#50 7/2001
● Laser Class I IEC 60825
Standards
● IEEE 802.3u
● IEEE 802.3z
● IEEE 802.3ah
● GR-20-CORE: Generic Requirements for Optical Fiber and Optical Fiber Cable
● GR-326-CORE: Generic Requirements for Single-Mode Optical Connectors and Jumper Assemblies
● GR-1435-CORE: Generic Requirements for Multifiber Optical Connectors
● RoHS 5