LS-CW571G-20C delivers up to 1.25Gbps throughput as a 1570nm CWDM SFP optical transceiver designed for extended-reach network links. Built with a CWDM DFB laser and a PIN photodetector, it enables seamless single-mode fiber transmission over distances up to 20km. The transceiver integrates real-time digital diagnostic monitoring for continuous telemetry and operates reliably between 0°C and +70°C.
LINK-PP Part Number
LS-CW571G-20C
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1570nm
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 Support
Yes
Operating Temperature Range
0 to 70°C
Protocols
SFP MSA、SFF-8472
Key Features of LINK-PP LS-CW571G-20C 1G SFP
LINK-PP LS-CW571G-20C is a commercial-grade 1570nm CWDM optical module designed to deliver reliable 20km single-mode fiber transmissions over duplex LC connections. This compact module combines standardized hardware compatibility with real-time digital optical monitoring for efficient fiber network deployments.
LINK-PP LS-CW571G-20C 1G SFP Optical Module
This transceiver utilizes a hot-pluggable SFP footprint that allows simple field installation without shutting down host equipment. Full compliance with the SFP Multi-Source Agreement (MSA) ensures seamless physical and electronic interoperability across standard network switches and routers.
LS-CW571G-20C: 1 Gbps Connectivity for Commercial Fiber Infrastructure
Line-rate data transfer up to 1.25Gbps provides dependable gigabit throughput for core enterprise and commercial network links. Gigabit transmission capabilities make the module an effective solution for connecting enterprise switch trunks and edge routing devices.
LS-CW571G-20C Module with CWDM Technology for Fiber Efficiency
Coarse Wavelength Division Multiplexing enables multiple discrete optical channels to run concurrently over a single shared optical fiber line. Multiplexing technology dramatically expands total network bandwidth capacity while avoiding the expense of laying new physical cable runs.
LS-CW571G-20C Module with 1570nm Wavelength
Operating on a fixed 1570nm central channel, the optical DFB laser provides precise wavelength targeting within standard CWDM grid spectrums. Channelized laser output prevents spectral overlap and signal crosstalk when combined alongside other wavelength channels on the same fiber pair.
LS-CW571G-20C Module Supporting 20km Transmission
A highly sensitive PIN photodetector and optics system support unamplified optical transmission spans up to 20 km over single-mode fiber. Span coverage across 20km makes the module ideal for connecting separated campus buildings and regional metro access locations.
LS-CW571G-20C Module with Duplex LC Interface
Industry-standard duplex LC optical connectors provide a secure, low-loss interface for dual-fiber transmit and receive connections. Compact LC latching mechanics ensure mechanical stability and optical alignment in high-density patch panels and switch ports.
LS-CW571G-20C Module with DDM for Real-Time Monitoring
Digital Diagnostic Monitoring capabilities offer real-time telemetry metrics for tracking optical power, laser bias current, supply voltage, and operating temperature. Full compatibility with SFF-8472 digital diagnostics standards allows network management software to read live transceiver operational metrics automatically.
LINK-PP LS-CW571G-20C 1G SFP Certification
LS-CW571G-20C 1G SFP transceiver module is manufactured under strict international quality management standards to ensure compliance and environmental safety. The module holds ISO 9001, CE, RoHS, and FCC certifications to meet rigorous regulatory requirements for commercial deployments.
Every optical module undergoes rigorous signal validation and optical power testing before shipment. Comprehensive factory inspection ensures stable performance and long-term hardware reliability in real-world operating environments.
LS-CW571G-20C Quality Certifications
These regulatory compliance standards confirm that the module meets strict electromagnetic compatibility and environmental protection directives. Adherence to global industry certifications provides enterprise networks with verified product safety and long-term operating reliability.
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-CW571G-20C Certified for Reliable Host-Device Compatibility
Interoperability testing verifies seamless plug-and-play operation across major brands of enterprise switches and routers. Standardized coding ensures host switches immediately recognize the module without causing system port errors.
Rigorous Testing Ensures Reliable SFP Performance
Every LS-CW571G-20C 1G SFP optical transceiver undergoes comprehensive performance validation to guarantee optimal network stability in live operational environments. Discover our complete testing methodology and verification standards at the LINK-PP Test Support Center.
Optical Spectrum Test
Verify precise 1570nm laser wavelength emission and optical suppression ratios.
Eye Pattern Test
Analyze signal integrity to ensure clear optical waveform transmission quality.
Bit Error Rate Test
Measure data transmission accuracy to guarantee error-free line-rate network performance.
Temperature Test
Validate stable module operation across commercial 0°C to 70°C thermal conditions.
Product Shipping for LINK-PP LS-CW571G-20C 1G SFP
We utilize secure packaging standards and reliable freight services to ensure safe transit for every optical module order. Standardized logistics operations allow us to ship products promptly to customers across worldwide destinations.
Anti-Static Protective Packaging
Prevent electrostatic discharge damage during transit using specialized packaging.
Shock-Resistant Transport Protection
Protect optical hardware against transit impacts using durable outer boxes.
Fast Order Processing and Dispatch
Process pending product orders quickly to ensure rapid warehouse dispatch.
Global Logistics and International Delivery
Ship optical modules worldwide via reliable international express courier partners.
LINK-PP LS-CW571G-20C 1G SFP Usage Demonstration
Installing the LINK-PP LS-CW571G-20C 1G SFP requires sliding the module into a compatible switch port and securing duplex LC optical cabling. Designed for commercial fiber infrastructure, this 1570nm CWDM module provides cost-effective gigabit connections across corporate campus networks, data trunks, and telecom infrastructure.
LS-CW571G-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-CW571G-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:
Yes. The module features integrated DDM per the SFF-8472 standard. It reports real-time operating parameters—including optical transmit/receive power, internal temperature, supply voltage, and laser bias current—directly into your switch CLI and SNMP monitoring platforms. By
admin on
2026-02-15
A:
Yes. The module is rated for a standard commercial case temperature range of 0°C to +70°C. As long as your rack cooling keeps the switch chassis within normal indoor operating limits, the module runs stably without performance degradation. By
admin on
2025-09-04
A:
Yes. The LS-CW571G-20C module uses a standard 1570nm CWDM DFB laser with a duplex LC receptacle designed specifically for single-mode fiber. It pairs directly with standard 20nm-channel-spaced CWDM multiplexers for point-to-point links up to 20km. By
admin on
2025-03-29
Used these for an 18km fiber span to support our surveillance network backhaul. The receiver sensitivity is great, leaving plenty of power margin to handle patch panel insertion loss. Highly recommended for network expansions!
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character.
491845
454423
U***d
Singapore
Verified
Purchase
5 .0
2026-05-22
Impressive 20km reach for such a compact form factor. We tested it across a 15km dark fiber link, and the light levels were strong on both ends with no packet drops during high-throughput file transfers. Very reliable product!
Please write comments with more than three
character.
491845
454417
Z***s
Indonesia
Verified
Purchase
5 .0
2026-04-16
We installed a batch of 20 units for an indoor facility network expansion requiring high-density CWDM wavelength channel stacking. Every single transceiver registered immediately at full 1Gbps line speed, maintaining consistent optical power budgets and low power consumption across every switch port. The digital diagnostics provide precise telemetry for our daily maintenance checks, making it easy to track link health across different server rooms. A reliable and cost-effective optical module for any large-scale infrastructure project.
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character.
491845
454432
G***n
Mexico
Verified
Purchase
5 .0
2026-03-16
Upgraded our network trunk line using this 20km SFP optical transceiver. The duplex LC connector latches firmly into place, and the optical link synchronized immediately at 1G speed. Power consumption and operating heat are very low. Solid hardware!
Please write comments with more than three
character.
491845
454420
X***e
Philippines
Verified
Purchase
5 .0
2026-03-06
We put four of these 20km CWDM modules through a rigorous 72-hour continuous throughput test over our 12km single-mode backbone. The DFB laser holds a very precise 1570nm central wavelength, completely eliminating any optical bleed or interference into neighboring channels on our multiplexer. The duplex LC connection latches with a solid tactile click, and the standardized MSA design allowed immediate plug-and-play operation with no port negotiation hiccups. Overall, a dependable 1.25Gbps CWDM SFP solution that provides great enterprise-grade stability.
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character.
491845
454415
S***e
Spain
Verified
Purchase
5 .0
2026-01-07
The commercial operating temperature range (0°C to 70°C) handles our warm indoor distribution closets with no issues at all. The internal temperature stays well within safe limits even during peak data traffic hours.
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character.
491845
454425
V***n
Thailand
Verified
Purchase
5 .0
2025-12-23
Follows MSA standards strictly. Both switches recognized the module instantly on insertion without needing manual port configuration. If you need a straightforward, cost-effective 1G CWDM optical module, this one delivers.
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character.
491845
454416
B***e
New Zealand
Verified
Purchase
4 .0
2025-10-31
Everything works as expected and the module has been stable for weeks now. The only thing I'd mention is that delivery took a few days longer than the promised window. Not a big deal since the product quality is good, but if you're on a tight schedule, plan for a little extra shipping time.
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491845
454434
N***x
Netherlands
Verified
Purchase
5 .0
2025-10-17
Great transceivers for our server rack aggregation. The built-in digital diagnostics accurately report internal temperature, voltage, and Tx/Rx optical levels directly to our monitoring system. Very satisfied with the build quality!
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character.
491845
454413
A***n
South Africa
Verified
Purchase
4 .0
2025-08-19
The SFP works perfectly and the DDM readings are accurate, so I'm happy with the purchase. The only downside was the box arrived with a dented corner, probably from rough handling in transit. Nothing inside was damaged and the module tested fine. Just wish the outer packaging was a little stronger.
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character.
491845
454433
G***e
India
Verified
Purchase
5 .0
2025-08-11
We ordered a batch of these 1570nm CWDM modules to link two office buildings over single-mode fiber. The 1.25Gbps line rate is completely stable, and the real-time DDM optical power readouts make monitoring our link budget super easy. Excellent value for money!
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character.
491845
454419
W***d
Russian Federation
Verified
Purchase
5 .0
2025-07-14
We deployed these 1570nm 1G CWDM SFP transceivers across a 16km single-mode fiber span connecting two campus data centers through a passive CWDM filter. The optical output remained remarkably stable at -2 dBm Tx, leaving plenty of power margin against the receiver threshold for clean transmission. The integrated DDM function reports real-time laser bias current, voltage, and module temperature accurately into our SNMP monitoring tools without any lag. Even under continuous full-duplex traffic, the housing stays cool and delivers zero bit errors across the entire link.
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491845
454414
R***r
Italy
Verified
Purchase
5 .0
2025-05-06
Essential optical transceiver for stacking Gigabit channels over a single fiber pair. The laser output is clean and precise at 1570nm, making multi-wavelength multiplexing effortless. Fast delivery and neat anti-static packaging as well!
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491845
454424
H***n
Republic of Korea
Verified
Purchase
5 .0
2025-04-19
Integrated this 1570nm SFP module into our existing passive CWDM multiplexer setup. The wavelength stability is spot-on with zero adjacent channel crosstalk. Latency is rock bottom, and the link has been running smoothly since day one.
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character.
491845
454421
Y***n
Malaysia
Verified
Purchase
5 .0
2025-03-21
Upgrading our multi-building network trunks with these 1570nm optics gave us the extra channel capacity we needed without laying extra fiber. Across our 9km OS2 fiber runs, signal attenuation was practically negligible, and the PIN receiver kept packet latency flat under heavy data backup loads. The metal housing provides effective heat dissipation and solid shielding, keeping internal operating temperatures around 40°C even inside tightly packed distribution racks. For reliable point-to-point Gigabit transport, this transceiver delivers top performance!
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character.
491845
454431
T***n
Norway
Verified
Purchase
5 .0
2025-02-08
We needed reliable 1G CWDM SFP modules for out-of-band management links between data closets. The duplex LC ports click in securely, and signal attenuation remains well within standard specs. Great choice for enterprise networks!
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