Cisco SFP Modules for
Gigabit Ethernet Applications
Data sheet
Cisco public
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Contents
Features and benefits 3
100/1000BASE-LX SFP for long-reach single-mode fibers 4
SFP Operation at 100M 4
2-Channel 1000BASE-BX10-D for single-fiber bidirectional applications 5
Product specifications 7
Ordering information 11
Warranty 12
Cisco environmental sustainability 12
Regulatory and standards compliance 13
Next steps 13
Cisco Capital 13
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Cost-effective Small Form-factor Pluggable (SFP) transceivers for Gigabit Ethernet
applications
Product overview
The industry-standard Cisco® Small Form-Factor Pluggable (SFP) Gigabit Interface Converter (Figure 1) links
your switches and routers to the network. The hot-swappable input/output device plugs into a Gigabit Ethernet
port or slot. Optical and copper models can be used on a wide variety of Cisco products and intermixed in
combinations of 1000BASE-T, 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-EX, 1000BASE-ZX, or
1000BASE-BX10-D/U on a port-by-port basis.
Figure 1.
Cisco Optical Gigabit Ethernet SFP
Figure 2.
Cisco 1000BASE-T Copper SFP
Figure 3.
Cisco 2-Channel 1000BASE-BX Optical SFP
Features and benefits
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Hot swappable to maximize uptime and simplify serviceability
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Flexibility of media and interface choice on a port-by-port basis, so you can “pay as you populate”
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Robust design for enhanced reliability
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Supports Digital Optical Monitoring (DOM) capability
1000BASE-T SFP for copper networks
The 1000BASE-T SFP operates on standard Category 5 unshielded twisted-pair copper cabling of link lengths
up to 100 m (328 ft). Cisco 1000BASE-T SFP modules support 10/100/1000 auto negotiation and Auto
MDI/MDIX.
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1000BASE-SX SFP for multimode fiber only
The 1000BASE-SX SFP, compatible with the IEEE 802.3z 1000BASE-SX standard, operates on legacy 50 μm
multimode fiber links up to 550 m and on 62.5 μm Fiber Distributed Data Interface (FDDI)-grade multimode
fibers up to 220 m. It can support up to 1km over laser-optimized 50 μm multimode fiber cable.
1000BASE-LX/LH SFP for both multimode and single-mode fibers
The 1000BASE-LX/LH SFP, compatible with the IEEE 802.3z 1000BASE-LX standard, operates on standard
single-mode fiber-optic link spans of up to 10 km and up to 550 m on any multimode fibers. When used over
legacy multimode fiber type, the transmitter should be coupled through a mode conditioning patch cable. For
details on this implementation, refer to
https://www.cisco.com/en/US/prod/collateral/modules/ps5455/product_bulletin_c25-530836.html.
1000BASE-EX SFP for long-reach single-mode fibers
The 1000BASE-EX SFP operates on standard single-mode fiber-optic link spans of up to 40 km in length. A 5dB inline optical attenuator should be inserted between the fiber-optic cable and the receiving port on the SFP
at each end of the link for back-to-back connectivity.
1000BASE-ZX SFP for long-reach single-mode fibers
The 1000BASE-ZX SFP operates on standard single-mode fiber-optic link spans of up to approximately 70 km
in length. The SFP provides an optical link budget of 21 dB, but the precise link span length depends on
multiple factors such as fiber quality, number of splices, and connectors.
When shorter distances of Single-Mode Fiber (SMF) are used, it might be necessary to insert an inline optical
attenuator in the link to avoid overloading the receiver. A 10-dB inline optical attenuator should be inserted
between the fiber-optic cable plant and the receiving port on the SFP at each end of the link whenever the
fiber-optic cable span loss is less than 8 dB.
100/1000BASE-LX SFP for long-reach single-mode fibers
The dual-rate 100M/1G 10Km SFP is interoperable with the IEEE 100BASE-LX and 1000BASE-LX/LH
standards.
The GLC-GE-DR-LX SFP also supports Digital Optical Monitoring (DOM) functions according to the industrystandard SFF-8472 Multisource Agreement (MSA). This feature gives the end user the ability to monitor realtime parameters of the SFP, such as optical output power, optical input power, temperature, laser bias current,
and transceiver supply voltage.
SFP Operation at 100M
The GLC-GE-DR-LX SFP can interoperate with other 100M SFPs/interfaces as long as those are based on
100BASE-LX10 standard. A 5dB attenuator is needed on the path of dual-rate SFP Tx and 100BASE-LX10
interface Rx. No attenuator is needed on the other fiber strand.
SFP Operation at 1G
The GLC-GE-DR-LX SFP can interoperate with other 1G SFPs/interfaces as long as those are based on
1000BASE-LX/LH standard. No attenuator is needed in any fiber strand.
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