LS-CW291G-20C SFP module operates on a 1290nm CWDM wavelength to enable up to 1.25Gbps optical connectivity across SMF spans of up to 20km. It incorporates a CWDM DFB laser and PIN photodetector with real-time digital optical monitoring, maintaining standard commercial operation from 0 to +70°C.
LINK-PP Part Number
LS-CW291G-20C
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1290nm
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 LINK-PP LS-CW291G-20C 1G SFP
LINK-PP LS-CW291G-20C integrates coarse wavelength division multiplexing (CWDM) technology into a hot-pluggable form factor to deliver reliable 1Gbps optical connectivity over 20km spans. Designed for commercial deployment, it combines standard duplex LC termination with real-time digital diagnostics to simplify network expansion and monitoring.
LINK-PP LS-CW291G-20C 1G SFP Optical Module
This transceiver features a hot-pluggable SFP footprint that allows for quick installation and maintenance without disrupting active host equipment. It fully complies with the Multi-Source Agreement (MSA) standard to ensure seamless physical and electrical interoperability across standard network switches.
LS-CW291G-20C: 1 Gbps Connectivity for Fiber Optic Aggregation
Gigabit Ethernet throughput enables stable line-rate traffic distribution across multiple access points into central switches. This consistent 1Gbps bandwidth delivery makes the module well suited for bandwidth-intensive fiber aggregation links.
LS-CW291G-20C Module with CWDM Technology for Fiber Efficiency
Coarse wavelength division multiplexing enables multiple data channels to transmit simultaneously across a shared physical medium. Utilizing this multiplexing approach maximizes existing optical infrastructure capacity without the cost of pulling extra cables.
LS-CW291G-20C Module with 1290nm Wavelength
The 1290nm optical channel operates on a defined ITU-T grid frequency to ensure precise spectral isolation. Its dedicated transmitter prevents adjacent channel interference within multi-wavelength CWDM multiplexing systems.
LS-CW291G-20C Module Supporting 20km Transmission
A single-mode fiber reach of up to 20km provides ample optical budget for point-to-point connections across campus grounds and local access rings. The integrated DFB laser and sensitive PIN receiver maintain clean optical signal integrity over this medium-distance span.
LS-CW291G-20C Module with Duplex LC Interface
The industry-standard duplex LC optical connector provides a secure, snap-in mechanical fit with common fiber patch cords. Its compact dual-fiber design minimizes insertion loss and supports high-density port configurations on patch panels.
LS-CW291G-20C Module with DOM for Real-Time Monitoring
Built-in digital optical monitoring (DOM) delivers real-time telemetry on operating temperature, supply voltage, laser bias current, and optical transmit/receive power levels. Fully compatible with SFF-8472 digital diagnostics functions, it enables network administrators to proactively detect link issues via host software.
LINK-PP LS-CW291G-20C 1G SFP Certification
LINK-PP LS-CW291G-20C CWDM SFP module meets strict international standards, backed by certifications including ISO 9001, CE, RoHS, and FCC. These official credentials verify that the module complies with global safety, quality, and environmental regulations for optical networking.
Each SFP module undergoes rigorous factory testing, including optical eye-pattern analysis and bit error rate (BER) checks. This multi-step inspection ensures consistent optical output and signal stability before shipment.
LS-CW291G-20C Quality Certifications
Strict compliance with certified quality management systems guarantees consistent manufacturing standards across every production batch. These global accreditations verify that each module satisfies regulated electrical safety and environmental material requirements.
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.
LS-CW291G-20C Certified for Reliable Host-Device Compatibility
Extensive switch verification confirms full interoperability across a wide range of standard vendor switches, routers, and media converters. Plug-and-play validation ensures immediate link recognition and error-free DOM reporting upon insertion.
Rigorous Testing Ensures Reliable SFP Performance
Every LS-CW291G-20C 1G SFP transceiver undergoes comprehensive hardware and optical evaluations to ensure consistent signal integrity in operational networks. To explore our validation processes and equipment setups, visit the LINK-PP Test Support Center.
Optical Spectrum Test
Verify central wavelength precision and side-mode suppression ratio standards.
Eye Pattern Test
Evaluate optical transmitter waveform clarity and overall signal-to-noise ratio.
Bit Error Rate Test
Measure data transmission accuracy across extended single-mode fiber links.
Temperature Test
Confirm stable optical performance across standard commercial operating conditions.
Product Shipping for LINK-PP LS-CW291G-20C 1G SFP
Each LS-CW291G-20C SFP transceiver is carefully prepared using dedicated protective materials to prevent physical and electrostatic damage during transit. Reliable logistics networks ensure that all orders are processed swiftly and delivered securely to international destinations.
Anti-Static Protective Packaging
Prevent electrostatic discharge damage across electrical pins and internal circuitry.
Shock-Resistant Transport Protection
Absorb mechanical shocks to maintain optical subassembly alignment during transit.
Fast Order Processing and Dispatch
Accelerate order verification and inventory release for rapid carrier handoff.
Global Logistics and International Delivery
Deliver transceivers worldwide through established international carriers.
LINK-PP LS-CW291G-20C 1G SFP Usage Demonstration
Insert the LS-CW291G-20C optical transceiver into a compatible SFP switch port and connect single-mode duplex LC fiber to the corresponding CWDM MUX/DEMUX channel. This simple setup rapidly aggregates distributed 1Gbps access links into centralized core networks, maximizing bandwidth over long-distance single-mode fiber routes.
LS-CW291G-20C 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 LS-CW291G-20C 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:
They can run over the same fiber as long as you route them through a dedicated CWDM Mux/Demux filter. Because traditional 1310nm optics emit a relatively wide light spectrum, feeding both into an unfiltered tap can cause optical overlap. A standard CWDM mux filter cleanly separates the 1290nm wavelength (20nm channel spacing) without crosstalk. By
admin on
2026-05-09
A:
Yes. With the SFF-8472 DOM support, your switch or monitoring platform can read values such as transmit power, receive power, module temperature, voltage, and bias current when the host supports those fields. Tracking RX-power changes over time can help flag dirty connectors, bend issues, or increasing splice loss before the link reaches its operating limit. By
admin on
2026-03-05
A:
The module’s specified operating range is 0 to 70°C, so suitability depends on the actual temperature inside the enclosure, not only the outdoor weather. Use it in a climate-controlled or adequately ventilated cabinet where internal conditions remain within range; for exposed or extreme-temperature deployments, choose an industrial-temperature optic instead. By
admin on
2025-12-16
A:
No, it will not disrupt neighboring links. The module features a true hot-pluggable SFP footprint with built-in ESD protection and soft-start power sequencing for its 3.3V supply. You can safely insert or remove it while the switch chassis is powered and running. By
admin on
2025-08-03
A:
Yes. The LS-CW291G-20C hardware architecture natively supports 1.063Gbps Fiber Channel in addition to standard 1.25Gbps Gigabit Ethernet. Simply make sure your storage switch interface is configured for 1G FC mode. By
admin on
2025-06-28
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character.
491704
462954
P***e
Singapore
Verified
Purchase
5 .0
2026-06-03
Rolled out twelve units for a business park fiber-to-the-suite distribution node. Tested across multiple commercial client circuits up to 18km; transmit power stayed perfectly stable and compatibility across customer-premise routers was seamless right out of the box.
Please write comments with more than three
character.
491704
462970
S***s
Belarus
Verified
Purchase
5 .0
2026-05-12
Swapped out standard optics for this CWDM setup to save fiber strands. The receiver sensitivity has plenty of headroom for our building runs, and it runs quite cool inside the server room rack. :-)
Please write comments with more than three
character.
491704
462962
L***d
Brunei Darussalam
Verified
Purchase
5 .0
2026-04-09
Bought a batch for older gigabit aggregation switches where we needed to add CWDM capacity without replacing fiber. These 20km SFP modules matched our existing channel plan and passed our basic compatibility checks without any coding surprises.
Please write comments with more than three
character.
491704
462960
A***g
Denmark
Verified
Purchase
5 .0
2026-03-19
Configured these modules for a logistics warehouse security hub connecting outer security gates over 12km of single-mode cable. Real-time DOM telemetry makes remote maintenance simple by letting us verify light levels from the central office without visiting field cabinets.
Please write comments with more than three
character.
491704
462951
P***s
New Zealand
Verified
Purchase
5 .0
2026-02-11
Flawless 1.25Gbps link over 14km between two medical clinic branches. The DFB laser keeps transmit power very stable, and the real-time DOM monitoring reported accurate signal levels right into our network dashboard.
Please write comments with more than three
character.
491704
462957
J***s
New Zealand
Verified
Purchase
5 .0
2026-01-15
Our enterprise distribution backbone was running out of spare dark fiber, so we added this 1290nm channel alongside our primary links. The optics were recognized instantly across our mixed-vendor core switches without throwing alarms. Optical output power stayed steady under heavy daytime user traffic. =D
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491704
462956
E***n
Norway
Verified
Purchase
5 .0
2025-11-27
No drama during deployment. The SFP seated firmly, the duplex LC ports aligned with our existing patch leads, and link status came up right after we cleaned the connectors. DOM made commissioning easier because we could verify optical power remotely.
Please write comments with more than three
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491704
462967
J***s
Singapore
Verified
Purchase
5 .0
2025-10-22
Upgraded our off-site data backup link between two commercial office towers over a 16km single-mode fiber span. Both transceivers negotiated immediately at full gigabit speed without hardware errors. The stable laser output ensures large database backup jobs finish overnight without dropping a single packet.
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491704
462955
G***n
France
Verified
Purchase
5 .0
2025-08-19
We use these CWDM modules in a campus backbone migration where spare single-mode fiber is limited. The 1.25G SFP rate is exactly what our legacy 1G switch uplinks need, and the 1290nm CWDM wavelength helps keep each service separated.
Please write comments with more than three
character.
491704
462952
J***z
Russian Federation
Verified
Purchase
4 .0
2025-07-11
These CWDM SFP modules work great at gigabit speed across our 15km link, but the shipping box was slightly crushed on delivery and arrived a couple of days late. Luckily, the transceivers were safe inside their protective trays.
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491704
462971
J***e
Libyan Arab Jamahiriya
Verified
Purchase
5 .0
2025-06-12
Built a high-speed replication link to our off-site commercial disaster recovery facility across 17km of fiber. With high receiver sensitivity, this module provided plenty of optical safety margin after multiplexer losses. Very reliable build quality, proper metal casing, and accurate power reporting.
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491704
462966
M***l
United States
Verified
Purchase
5 .0
2025-05-16
We used these 1290nm SFP modules for a city-wide commercial surveillance camera backbone. The connection stayed quiet with zero frame drops even through multiple building patch panels along the 15km route.
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491704
462959
G***z
United Arab Emirates
Verified
Purchase
4 .0
2025-04-18
The transceivers themselves are working exactly as expected. Shipping took one extra day because of a carrier handoff, but the order arrived complete and the modules passed our incoming test.
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491704
462953
J***s
Norway
Verified
Purchase
5 .0
2025-03-18
Deployed a batch across remote telecom equipment shelters for commercial cell site backhaul. The 20km link budget easily handles all our patch panels and intermediate splices. Operating well within the standard commercial temperature range, internal thermals stayed around 38°C inside dense server shelves.
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character.
491704
462964
B***d
Spain
Verified
Purchase
5 .0
2025-02-04
Bought eight of these CWDM SFP transceivers to light up the 1290nm channel on our passive optical multiplexer rack. Clean duplex LC latching and completely compatible with our multi-vendor aggregation setup. :D
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character.
491704
462958
A***y
Israel
Verified
Purchase
5 .0
2025-01-22
Great solution for our municipal utility monitoring network. The 1290nm channel integrated cleanly into our multi-channel optical mux without any signal bleed into adjacent channels. The link has performed flawlessly around noisy commercial power distribution rooms.
Germany · English · EUR
