SFP-GE-LH20-SM1270-CW serves as a 1270nm CWDM 1G SFP transceiver supporting point-to-point data links up to 1.25Gbps for up to 20km SMF transmissions via a DFB laser and PIN photodiode. Real-time digital diagnostic monitoring is integrated directly into the module to track operating parameters across its 0 to +70°C thermal range.
H3C Part Number
SFP-GE-LH20-SM1270-CW
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1270nm
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/DOM
Supported
Operating Temperature Range
0 to 70°C
Protocols
SFP MSA、SFF-8472
Key Features of H3C SFP-GE-LH20-SM1270-CW Compatible LINK-PP 1G SFP
H3C SFP-GE-LH20-SM1270-CW Compatible LINK-PP combines a 1270nm CWDM channel, 1Gbps data rate, and single-mode reach up to 20km into a standard SFP form factor. It delivers real-time diagnostics functions, reliable duplex LC connectivity, and maximum fiber utilization across commercial networking environments.
The module features a hot-pluggable SFP footprint that allows easy installation and replacement without powering down host switches. Full compliance with the SFP Multi-Source Agreement (MSA) ensures seamless physical and electrical interoperability across standard network equipment.
SFP-GE-LH20-SM1270-CW: 1 Gbps Connectivity for Wavelength Multiplexing Systems
This transceiver provides stable 1Gbps data throughput for Gigabit Ethernet and multi-channel wavelength multiplexing links. It offers reliable point-to-point bandwidth for campus backbones, enterprise aggregation, and multi-service optical networks.
SFP-GE-LH20-SM1270-CW Module with CWDM Technology for Fiber Efficiency
Coarse Wavelength Division Multiplexing (CWDM) technology enables multiple discrete channels to share the same physical fiber strand simultaneously. This capability significantly increases overall bandwidth capacity while eliminating the cost of laying new optical cable infrastructure.
SFP-GE-LH20-SM1270-CW Module with 1270nm Wavelength
Operating at a 1270nm center wavelength, the internal DFB transmitter aligns precisely with standard ITU-T CWDM grid channel plans. This dedicated optical channel prevents spectrum overlap and minimizes signal interference in multiplexed environments.
An engineered optical power budget allows the transceiver to transmit signals up to 20km over standard single-mode fiber. This reach makes it well-suited for regional distribution, metro access rings, and inter-building campus interconnections.
SFP-GE-LH20-SM1270-CW Module with Duplex LC Interface
The industry-standard duplex LC optical receptacle ensures secure, low-loss fiber patch cable connections. Its compact dual-fiber connector design supports clean cable management and high port density on network faceplates.
SFP-GE-LH20-SM1270-CW Module with DDM for Real-Time Monitoring
Integrated Digital Diagnostic Monitoring (DDM) allows network administrators to track operational parameters such as optical power, temperature, bias current, and supply voltage in real time. Full compatibility with SFF-8472 digital diagnostics simplifies link troubleshooting and helps prevent unexpected network downtime.
H3C SFP-GE-LH20-SM1270-CW Compatible LINK-PP SFP module meets strict international quality, environmental, and safety standards including ISO 9001, CE, RoHS, and FCC certifications. These compliance credentials verify that every optical module delivers reliable operation and eco-friendly manufacturing.
Each CWDM SFP transceiver undergoes rigorous factory inspections, including bit-error-rate analysis, optical wavelength testing, and temperature cycling. These strict quality checks ensure that every module performs reliably before deployment.
SFP-GE-LH20-SM1270-CW Quality Certifications
Official certification approvals confirm that the hardware meets global regulatory guidelines for electrical safety and electromagnetic shielding. Adherence to these international mandates guarantees safe and consistent field operation.
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-SM1270-CW Certified for Reliable Host-Device Compatibility
Comprehensive switch-port validation ensures full interoperability across a broad range of multi-vendor networking devices. The module integrates seamlessly into existing host systems without port rejection or firmware communication errors.
Rigorous Testing Ensures Reliable SFP Performance
Every SFP-GE-LH20-SM1270-CW 1G CWDM SFP module undergoes a strict factory testing process to guarantee stable signal transmission and lasting hardware reliability in live network environments. To explore our comprehensive quality control procedures and validation standards, visit the LINK-PP Test Support Center.
Optical Spectrum Test
Verify central wavelength precision and optical spectral power distribution.
Eye Pattern Test
Analyze transmitter signal integrity and validate optical waveform compliance.
Bit Error Rate Test
Measure data transmission accuracy to eliminate potential packet drops.
Temperature Test
Evaluate continuous module stability across variable thermal operating conditions.
Product Shipping for H3C SFP-GE-LH20-SM1270-CW Compatible LINK-PP 1G SFP
H3C SFP-GE-LH20-SM1270-CW Compatible LINK-PP CWDM SFP modules are securely packed and processed to prevent physical damage during transit. Our streamlined logistics network ensures timely and reliable global dispatch directly to your deployment site.
Anti-Static Protective Packaging
Shield internal sensitive electronic circuits against hazardous electrostatic discharge.
Shock-Resistant Transport Protection
Prevent transit drops and sudden vibrations from damaging the transceiver module.
Fast Order Processing and Dispatch
Prepare and release inbound transceiver inventory for immediate carrier pickup.
Global Logistics and International Delivery
Deliver optical network hardware smoothly across worldwide customs clearance checkpoints.
Deploying the SFP-GE-LH20-SM1270-CW 1G CWDM SFP transceiver requires hot-swapping the unit into active host equipment and mating it to single-mode fiber using duplex LC interfaces. Integrated into multi-channel wavelength multiplexing systems, it routes 1270nm optical traffic seamlessly to expand core bandwidth across metropolitan and campus backbones.
SFP-GE-LH20-SM1270-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-SM1270-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:
The module is rated for 0°C to +70°C case temperature. However, as temperature approaches 70°C, TX power and ER will degrade, and wavelength shifts ~0.1nm/°C. We strongly recommend maintaining the case temperature below 65°C to keep a 5°C guard band, otherwise you may see increased bit errors even before link flaps occur. By
admin
A:
The LS-CW271G-20C uses an uncooled DFB laser compliant with ITU-T G.694.2 grid specifications. It operates with a center wavelength of 1270nm with a standard channel passband tolerance of ±6.5nm and 20nm channel spacing. It integrates seamlessly into standard 20nm-spaced CWDM mux/demux units without adjacent channel bleed. By
admin
A:
Absolutely. The transceiver fully complies with SFF-8472 Digital Diagnostic Monitoring (DDM/DOM). It reports real-time operating metrics including internal temperature, +3.3V supply voltage, laser bias current, transmit optical power, and received optical power directly to your switch or router management interface. By
admin
A:
Yes. The transceiver features a fully metal enclosure designed to provide continuous grounding and EMC suppression. It meets standard electromagnetic compatibility requirements, preventing high-current line interference from inducing packet jitter or bit errors. By
admin
Please write comments with more than three
character.
491702
493767
M***n
Taiwan, Province of China
Verified
Purchase
5 .0
2026-05-21
Upgraded our multi-tenant commercial building network using existing single-mode fiber lines. The duplex LC latches securely into dense patch panels without sticking. No proprietary hardware lockouts encountered anywhere, and speeds hit full gigabit capacity without drops ;)
Please write comments with more than three
character.
491702
493771
E***z
Ireland
Verified
Purchase
5 .0
2026-02-08
Built a passive CWDM setup across four school campus buildings using these 1270nm 1G SFP transceivers. Digital diagnostics report healthy signal levels across our 14km single-mode run. The laser holds a very steady wavelength under heavy daily file transfers, making it super reliable for high-traffic office backhaul :D
Please write comments with more than three
character.
491702
493765
B***n
Indonesia
Verified
Purchase
5 .0
2026-01-18
Replaced expensive OEM optics with these CWDM transceivers for our off-site disaster recovery server site. Instant link-up, zero dropped frames on our 16km fiber run, and accurate live telemetry in our monitoring software. Excellent value for commercial IT deployments :-D
Please write comments with more than three
character.
491702
493774
A***g
Italy
Verified
Purchase
4 .0
2026-01-13
These CWDM transceivers perform strictly to spec with stable link budgets across 15km, but the outer protective carton arrived slightly dinged in transit.
Please write comments with more than three
character.
491702
493776
J***n
Malaysia
Verified
Purchase
5 .0
2025-12-23
Deployed two pairs to connect a remote medical clinic back to the main hospital network. After weeks of non-stop video calling and patient record traffic, optical monitoring shows rock-solid transmitter power and balanced receiver levels. Superior build quality for critical business operations.
Please write comments with more than three
character.
491702
493763
R***n
France
Verified
Purchase
5 .0
2025-09-17
Integrated these optics into our business park perimeter security loop across 18km of buried fiber. The 1270nm channel passes cleanly through our passive multiplexer cassettes without bleeding into neighboring channels. The metal casing stays comfortably cool during continuous 24/7 operation.
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character.
491702
493764
R***n
Israel
Verified
Purchase
5 .0
2025-07-23
Ordered 24 units for commercial tower backhaul links. Operating temperature in our ventilated outdoor cabinet stays well within limits, and light levels remain totally stable. Strong shielding keeps signal noise down even alongside other active hardware. Highly recommended for commercial field telecom networks.
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character.
491702
493766
R***n
United Arab Emirates
Verified
Purchase
5 .0
2025-04-07
Tested these 1G SFP optical transceivers thoroughly on a dedicated test bench before rollout. Light output and sensitivity numbers easily meet the rated specs, and the module handles direct connections smoothly. Real-time diagnostic readings match our physical optical power meter with high precision.
Please write comments with more than three
character.
491702
493770
L***n
Mexico
Verified
Purchase
4 .0
2025-03-23
Performance is good and switch compatibility was fine. Delivery took a little longer than our project schedule expected, so order early for maintenance windows. The product itself is solid.
United States · English · USD
