SFP-GE-LH20-SM1490-CW is a 1G CWDM SFP module operating at a 1490nm wavelength for data rates up to 1.25Gbps. Equipped with a CWDM DFB laser and a PIN photo detector, it delivers reliable single-mode fiber transmission over distances up to 20km. The module also features real-time digital diagnostic monitoring (DDM) to simplify network management and operates seamlessly within a standard 0 to +70°C temperature range.
H3C Part Number
SFP-GE-LH20-SM1490-CW
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1490nm
Max Cable Distance
20km
Connector
Duplex LC
Media
SMF
Transmitter Type
DFB
Receiver Type
PIN
TX Power
-5 to 0dBm
RX Power
-26 to -1dBm
Receiver Sensitivity
-24dBm
Receiver Overload
-1dBm
EMC (Electromagnetic Compatibility)
Supported
DDM Support
Yes
Operating Temperature Range
0 to 70°C
Protocols
SFP MSA、SFF-8472
Key Features of H3C SFP-GE-LH20-SM1490-CW Compatible LINK-PP 1.25G SFP
H3C SFP-GE-LH20-SM1490-CW Compatible LINK-PP provides a reliable 1G optical networking solution designed for single-mode fiber applications. This 1G SFP module combines CWDM technology, 1490nm wavelength, and real-time digital monitoring to deliver efficient data transmission up to 20km.
SFP-GE-LH20-SM1490-CW module features a hot-pluggable SFP footprint that allows easy installation without shutting down system power. The transceiver fully complies with SFP MSA standards to ensure broad interoperability across various networking equipment.
SFP-GE-LH20-SM1490-CW: 1 Gbps Connectivity for Campus Distribution Links
Delivering a stable data rate of 1Gbps, this transceiver meets the core bandwidth requirements of modern distribution networks. The optical device is ideal for connecting switches and routers across campus environments or enterprise networks.
SFP-GE-LH20-SM1490-CW Module with CWDM Technology for Fiber Efficiency
Coarse Wavelength Division Multiplexing enables multiple data channels over a single fiber strand to maximize existing cable capacity. This advanced technology helps network operators expand bandwidth significantly without laying new optical cables.
SFP-GE-LH20-SM1490-CW Module with 1490nm Wavelength
Operating at a precise 1490nm optical wavelength, this module guarantees stable laser transmission over long distances. This specific channel helps minimize signal interference when used alongside other CWDM channels in the network.
Long-distance capability allows data signals to reach targets up to 20km over standard single-mode fiber. This extended range effectively connects separate buildings, remote data centers, and distant network nodes.
SFP-GE-LH20-SM1490-CW Module with Duplex LC Interface
Equipped with a standard duplex LC connector, this optical module ensures fast, secure, and reliable fiber optic patch cord connections. The widely adopted dual-fiber design provides dedicated channels for simultaneous transmitting and receiving.
SFP-GE-LH20-SM1490-CW Module with DDM for Real-Time Monitoring
Integrated Digital Diagnostics Monitoring (DDM) provides real-time tracking of critical operating metrics, including temperature, optical power, bias current, and supply voltage. Fully compliant with SFF-8472 standards, this diagnostic feature enables early fault detection and ensures consistent network performance.
H3C SFP-GE-LH20-SM1490-CW Compatible LINK-PP 1G CWDM SFP module meets strict international standards, holding industry certifications such as ISO 9001, CE, RoHS, and FCC. These compliance credentials guarantee that every transceiver is manufactured safely, environmentally friendly, and built to reliable quality levels.
Every CWDM module undergoes rigorous factory testing before shipment to verify optical signal stability and long-term durability. Engineers test each unit under real-world traffic conditions to ensure zero packet loss and error-free transmission.
SFP-GE-LH20-SM1490-CW Quality Certifications
Full compliance with international production standards confirms that the transceiver meets required electromagnetic compatibility and environmental safety regulations. These official regulatory approvals verify that the module adheres to standard hardware manufacturing and safety protocols.
This product is in conformity with ISO9001. This system is valid to a company engaging in development, production and supply service of fiber optical products. Please contact us to learn more.
ISO/IEC 27001 is an international standard for managing and processing information security. This standard is jointly developed by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It sets out requirements for establishing, implementing, maintaining, and continually improving an information security management system (ISMS). Ensuring the confidentiality, integrity, and availability of organizational information assets, obtaining an ISO 27001 certificate means that the enterprise has passed the audit conducted by a certification body, proving that its information security management system has met the requirements of the international standard. Please contact us to learn more.
This product is in conformity with ISO14001.It is intended for use by an organization seeking to manage its environmental responsibilities in a systematic manner that contributes to the environmental pillar of sustainability. Please contact us to learn more.
ISO 45001 is a global standard that sets out the requirements for an occupational health and safety management system (OH&SMS).
REACH is a European Union regulation concerning the Registration, Evaluation, Authorization and Restriction of Chemicals. It came into force on 1st June 2007 and replaced a number of European Directives and Regulations with a single system. The regulation aims to protect human health and environmental safety, maintain and improve the competitiveness of the EU chemical industry, and develop innovative capabilities for non-toxic and harmless compounds to prevent market fragmentation, increase the transparency of the use of chemicals, promote non-animal experiments, and pursue sustainable social development.Please contact us to learn more.
This product meets the applicable requirements of Directive (EU) 2015/863 of RoHS. It restricts the use of 10 hazardous materials in the manufacture of various types of electronic and electrical equipment: lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers, and four different phthalates. Please contact us to learn more.
This product fully accords with the FCC, which aims to manage the radio wave and magnetic fields more reasonably. Please contact us to learn more.
CB is an international system operated by IECEE. This product is based on IEC standards for testing the safety performance of electrical products. Please contact us to learn more.
This product fully accords with UKCA (UK Conformity Assessed) certificate, which signifies that it meets all relevant quality standards as well as health and safety requirements. Please contact us to learn more.
UL certification is a non-mandatory certification in the United States,mainly testing and certification of product safety performance.Its ultimate purpose is to obtain products with a fairly safe level for the market,and to contribute to ensuring human health and property safety.Please contact us to learn more.
SFP-GE-LH20-SM1490-CW Certified for Reliable Host-Device Compatibility
Extensive interoperability checks ensure flawless operation with major brand switches, routers, and optical equipment. Users can seamlessly plug the transceiver into existing network hardware without encountering firmware errors or link recognition issues.
Rigorous Testing Ensures Reliable SFP Performance
LINK-PP subjects every SFP-GE-LH20-SM1490-CW CWDM SFP module to multi-stage validation to guarantee rock-solid optical integrity and continuous uptime. Learn more about our complete hardware verification standards at the LINK-PP Test Support Center.
Optical Spectrum Test
Measure exact 1490nm wavelength accuracy and suppression.
Eye Pattern Test
Evaluate signal cleanliness and receiver jitter tolerances.
Bit Error Rate Test
Validate zero packet loss during maximum payload throughput.
Temperature Test
Benchmark thermal stability across commercial operating ranges.
Product Shipping for H3C SFP-GE-LH20-SM1490-CW Compatible LINK-PP 1.25G SFP
LINK-PP ensures safe product transit through specialized protective packaging and efficient logistics workflows. Every shipment is handled meticulously to maintain module integrity from dispatch to final delivery.
Anti-Static Protective Packaging
Neutralize static electricity threats during handling and transit.
Shock-Resistant Transport Protection
Cushion modules against physical vibration and handling impact.
Fast Order Processing and Dispatch
Expedite warehouse fulfillment to ensure prompt cargo departure.
Global Logistics and International Delivery
Fast worldwide delivery of transceivers through leading global carriers.
Simply insert the H3C SFP-GE-LH20-SM1490-CW Compatible LINK-PP module into an active SFP slot, connecting LC fiber patch cords to a 1490nm CWDM Mux/Demux port. This hot-pluggable deployment effortlessly aggregates bandwidth across campus distribution links, establishing reliable 20km single-mode interconnections without disrupting neighboring network traffic.
SFP-GE-LH20-SM1490-CW Technical Support
LINK-PP offers end-to-end technical support, from pre-sales consultation to post-deployment assistance, ensuring smooth integration and reliable network performance.
Pre-Sales Technical Consultation
Professional guidance to help you select the optimal SFP-GE-LH20-SM1490-CW module for your network design and application needs.
Compatibility Verification Support
Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.
Deployment & Installation Assistance
Comprehensive step-by-step guidance for installation, configuration, and initial setup, ensuring accurate deployment and reliable, stable operation from the start.
Long-Term Technical Assurance
Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.
A:
Yes. For standard point-to-point single-mode connections, both ends must use matching 1490nm transceivers. If you are using a CWDM Mux/Demux system, make sure both sides connect to the dedicated 1490nm multiplexer channel ports. By
admin on
2026-05-14
A:
You will need a standard single-mode fiber patch cable with duplex LC connectors. This module is designed specifically for single-mode fiber and will not work over multimode fiber. By
admin on
2026-03-02
A:
Yes. As long as your CWDM multiplexer has a dedicated 1490nm channel port and standard duplex LC connections, this module connects directly to expand your fiber capacity without interfering with other wavelength channels. By
admin on
2025-11-17
A:
This LS-CW491G-20C module includes built-in DDM (Digital Diagnostic Monitoring). You can easily check the live transmit power, receive light level, operating temperature, and voltage directly through your switch web interface or command line. By
admin on
2025-06-05
A:
Yes. This transceiver is designed with a narrow-band DFB laser specific to the 1490nm ITU grid. It can easily share the same single-mode fiber with other CWDM channels when connected through a standard passive CWDM Mux/Demux. By
admin on
2025-02-22
Standardized on LINK-PP 1490nm CWDM modules for our multi-tenant office building interconnects. Low power consumption, clean fiber latch mechanism, and crisp DDM diagnostic feedback.
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character.
491813
461486
S***s
Denmark
Verified
Purchase
5 .0
2026-05-03
Paired two of these LS-CW491G-20C SFP modules with our 8-channel passive CWDM Mux/Demux. Duplex LC seated snugly, and link came up immediately at full gigabit rate without manual negotiation tweaks.
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character.
491813
461481
N***n
Lithuania
Verified
Purchase
5 .0
2026-03-05
We installed these 1490nm CWDM modules to link two office buildings across town. Signal strength is great, data transfers run at full gigabit speed without dropouts, and the metal casing feels durable. Monitoring optical power is super easy through the switch dashboard. Very solid upgrade for our network :-D
Please write comments with more than three
character.
491813
461480
A***r
Thailand
Verified
Purchase
5 .0
2026-02-01
Implemented across our telecom aggregation nodes for cellular tower backhaul. The 20km optical reach easily covers our longest 16.2km span with plenty of margin above the -24 dBm receiver sensitivity limit. Sturdy metallic casing and standard MSA form factor make hot-swapping painless :D
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491813
461490
M***n
Bangladesh
Verified
Purchase
5 .0
2026-01-30
Plugged right into our aggregation switches with no setup hassle. The link connected immediately and signal has been completely stable. Great value for the price :)
Please write comments with more than three
character.
491813
461482
A***s
Brunei Darussalam
Verified
Purchase
4 .0
2026-01-10
Solid gigabit link with zero packet loss so far. Shipping took three days longer than expected due to customs delay, but the hardware quality is definitely worth the wait.
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character.
491813
461493
E***z
Republic of Korea
Verified
Purchase
5 .0
2025-12-02
Ordered a batch of 12 for our metro point-to-point ring expansion. All transceivers passed loopback tests with consistent TX power between -4 dBm and -2 dBm. Very satisfied ;)
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character.
491813
461479
M***z
Netherlands
Verified
Purchase
4 .0
2025-10-05
The 1490nm CWDM optical module performs great on our 15km fiber run, but the outer cardboard box arrived slightly dented. The module inside was well-cushioned and intact :)
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491813
461492
B***t
Hong Kong
Verified
Purchase
5 .0
2025-08-02
Built a dedicated low-latency SAN replication link between two branch data centers 17km apart. Optical attenuation measured around 7.2 dB through patch panels, and this optic maintained a rock-solid -14 dBm RX level. No frame drops or packet retransmissions observed during heavy iSCSI stress tests. Truly reliable hardware.
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character.
491813
461488
G***z
India
Verified
Purchase
5 .0
2025-07-24
Used for municipal CCTV fiber backhaul over single-mode lines. Excellent receiver sensitivity (-24 dBm measured at terminal node) and zero CRC errors logged over two weeks of continuous run :-)
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character.
491813
461483
A***l
Malaysia
Verified
Purchase
5 .0
2025-04-22
Swapped out our old modules for these and got full gigabit speeds right away. They stay cool in the server rack, draw very little power, and maintain a rock-solid fiber link without any extra tweaking. Definitely a smooth and easy upgrade :D
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character.
491813
461491
C***z
Indonesia
Verified
Purchase
5 .0
2025-03-11
Solid thermal stability inside our indoor server cabinet. Even under continuous high-throughput file sync, casing temp hovers around 38°C, well below the 70°C threshold.
Please write comments with more than three
character.
491813
461484
E***l
Israel
Verified
Purchase
5 .0
2025-01-07
The duplex LC fiber clicked right into place securely. We tested the link continuously for a month and had zero dropped packets or temperature issues. It delivers full gigabit speed without extra configuration. Great cost-effective fix for expanding our fiber lines =)
United Kingdom · English · GBP
