LS-CW511G-20C CWDM SFP optical module provides 1.25Gbps optical connectivity by combining a 1510nm DFB laser with a PIN photo detector for single-mode fiber links up to 20km. This SFP module incorporates integrated digital diagnostic monitoring for real-time link tracking and functions reliably within standard commercial temperatures from 0°C to +70°C.
LINK-PP Part Number
LS-CW511G-20C
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1510nm
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-CW511G-20C 1G SFP
LS-CW511G-20C combines standardized optical hardware with reliable CWDM multiplexing to deliver stable 1Gbps data links over single-mode fiber infrastructure. This commercial-grade transceiver integrates a 1510nm DFB laser, duplex LC connector, and real-time digital monitoring to streamline medium-reach network deployments.
LINK-PP LS-CW511G-20C 1G SFP Optical Module
Designed with a hot-pluggable SFP footprint, this optical transceiver allows seamless insertion and removal without interrupting active network switch operations. Fully compliant with SFP MSA standards, the module ensures broad physical and electrical compatibility across diverse enterprise networking platforms.
LS-CW511G-20C: 1 Gbps Connectivity for Commercial Data Center Uplinks
Delivering line-rate 1Gbps throughput, this transceiver provides reliable data transmission for bandwidth-demanding aggregation switches. It serves as a cost-effective solution for establishing stable commercial data center uplinks and campus network distribution lines.
LS-CW511G-20C Module with CWDM Technology for Fiber Efficiency
By leveraging Coarse Wavelength Division Multiplexing, this module transmits individual optical signals without requiring dedicated fiber pairs for every connection. It enables network operators to maximize existing single-mode fiber capacity and expand channel density efficiently.
LS-CW511G-20C Module with 1510nm Wavelength
Operating at a precise 1510nm central wavelength, this transceiver integrates a specialized DFB laser source for minimal spectral dispersion. This specific optical channel ensures clean signal separation and low crosstalk within multi-channel CWDM network systems.
LS-CW511G-20C Module Supporting 20km Transmission
A high-sensitivity PIN photodetector enables optical signals to traverse distances up to 20km over a single-mode fiber strand without signal degradation. This medium-reach capability makes it ideal for connecting inter-building networks and regional metro infrastructure.
LS-CW511G-20C Module with Duplex LC Interface
Industry-standard duplex LC connectors ensure low insertion loss and secure mechanical mating with existing fiber patch cables. The robust dual-fiber interface simplifies polarity alignment during field installation and maintenance routines.
LS-CW511G-20C Module with DDM for Real-Time Monitoring
Compliant with SFF-8472 standards, the built-in Digital Diagnostics Monitoring (DDM) feature provides continuous reporting on optical power, operating temperature, laser bias current, and supply voltage. Network administrators can leverage this real-time telemetry to detect potential link anomalies and maintain operational uptime.
LINK-PP LS-CW511G-20C 1G SFP Certification
LS-CW511G-20C CWDM SFP module complies with international manufacturing and safety standards, including ISO 9001, CE, RoHS, and FCC certifications. These standard approvals confirm the module's electrical safety, environmental compliance, and quality control during production.
Every CWDM transceiver undergoes strict hardware testing for optical power, wavelength accuracy, and line-rate signal integrity before shipment. Factory burn-in tests and temperature cycling ensure consistent performance in operational environments.
LS-CW511G-20C Quality Certifications
Compliance documentation verifies that the transceiver meets international electromagnetic compatibility and hazardous substance restrictions. These regulatory approvals support seamless deployment in global enterprise and commercial networks.
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-CW511G-20C Certified for Reliable Host-Device Compatibility
System verification tests confirm complete interoperability across major commercial switch, router, and media converter platforms. Standard EEPROM coding ensures instant device recognition and accurate link detection upon insertion.
Rigorous Testing Ensures Reliable SFP Performance
LS-CW511G-20C SFP module undergoes comprehensive testing to verify optical signal parameters, line-rate data transmission, and environmental stability before delivery. Each module is validated against strict industry benchmarks to guarantee operational consistency in active networks, and you can explore our complete validation methodology at the LINK-PP Test Support Center.
Optical Spectrum Test
Verify central wavelength accuracy and spectral bandwidth using precision analyzers.
Eye Pattern Test
Evaluate optical signal quality and transmitter waveform clarity at speed.
Bit Error Rate Test
Measure line-rate transmission accuracy to ensure error-free data transfer.
Temperature Test
Confirm stable transceiver operation across commercial thermal range operating limits.
Product Shipping for LINK-PP LS-CW511G-20C 1G SFP
LS-CW511G-20C CWDM SFP modules are securely packaged and processed to protect optical components during transit. Standardized shipping workflows ensure timely delivery across domestic and international logistics channels.
Anti-Static Protective Packaging
Shield delicate optical transceivers against electrostatic discharge during handling.
Shock-Resistant Transport Protection
Safeguard modules against physical impact and vibration during transit.
Fast Order Processing and Dispatch
Prepare and ship orders quickly to ensure minimal delivery lead times.
Global Logistics and International Delivery
Transport packages to worldwide destinations through reliable logistics carriers.
LINK-PP LS-CW511G-20C 1G SFP Usage Demonstration
Align LS-CW511G-20C with the SFP port, seat it securely, and lock the bail latch before connecting the LC single-mode fiber. This 1510nm CWDM module enables seamless commercial data center uplinks, expanding channel capacity between distribution switches and core network routers over single-mode fiber infrastructure.
LS-CW511G-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-CW511G-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, absolutely. The LS-CW511G-20C is rated for a case temperature range of 0°C to +70°C (32°F to 158°F). Even in high-density indoor racks where equipment generates significant heat, the module's built-in DDM allows you to monitor internal temperatures in real time and maintain reliable 1.25Gbps transmission. By
admin on
2026-03-07
A:
Yes, the LS-CW511G-20C CWDM module features a built-in Digital Diagnostic Monitoring (DDM) function. Your switch can monitor real-time TX optical power, RX optical power, operating temperature, voltage, and laser bias current directly through the CLI or SNMP. By
admin on
2025-11-30
A:
Yes. The module is rated for up to 20km over single-mode fiber. As long as your total link loss (including fiber distance and Mux insertion loss) stays within the 20km optical power budget, it will maintain a stable connection. By
admin on
2025-07-09
We deployed these CWDM 1G SFP transceivers across mixed-vendor aggregation nodes to upgrade a 16km inter-facility fiber backbone. Compatibility was seamless upon insertion—the switches read the internal EEPROM profile immediately without throwing port warnings or needing forced CLI overrides. The optical signal remained remarkably clean throughout continuous traffic monitoring, and thermal dissipation stayed well controlled inside our switch chassis. It offers an excellent balance of reliability and cost efficiency for metro fiber networks.
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491815
454509
S***s
Netherlands
Verified
Purchase
5 .0
2026-06-17
Installed these 1510nm CWDM SFP modules in our distribution rack for passive CWDM multiplexing. The digital diagnostic monitoring shows clear signal levels through our Mux panel. Great drop-in transceivers for building-to-building enterprise links!
Please write comments with more than three
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491815
454496
G***n
Malaysia
Verified
Purchase
5 .0
2026-05-13
Slotted these into high-density switch panels. The hot-pluggable design fits snugly into the SFP cages, and we noticed no crosstalk or thermal buildup between adjacent ports.
Please write comments with more than three
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491815
454504
A***n
New Zealand
Verified
Purchase
5 .0
2026-04-20
Using these for base station backhaul runs up to ~15km. Signal stays clean, sensitivity is good, and they've been up for months without a single flap. Great CWDM SFP for the money.
Please write comments with more than three
character.
491815
454491
S***e
Spain
Verified
Purchase
5 .0
2026-03-18
Upgraded our inter-building backbone lines across campus. Excellent switch compatibility made deployment painless, and our monitoring software pulls live optical power stats without any extra setup.
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character.
491815
454512
A***r
Thailand
Verified
Purchase
5 .0
2026-01-12
Connected our main network switch to an offsite backup storage rack over 16km of single-mode fiber. Full Gigabit speed from day one, and the hardware recognized the transceiver instantly. (^_^)
Please write comments with more than three
character.
491815
454493
A***t
Finland
Verified
Purchase
5 .0
2025-12-06
Upgraded our campus trunk lines by adding this 1510nm CWDM channel over an existing 14km single-mode fiber run with multiple cross-connects. The link established instantly, and the unit maintained a clean, stable bit rate under continuous multi-day data transfers without a single packet drop or CRC error. Its robust metal casing provides great EMI protection in crowded distribution racks, making it an easy, trouble-free drop-in upgrade for any enterprise network.
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491815
454511
J***n
Philippines
Verified
Purchase
5 .0
2025-11-08
Great 1510nm CWDM solution for our fiber aggregation points. It handles the incoming optical light easily with plenty of headroom on the link budget. Clean build and sturdy metal housing.
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491815
454503
V***t
Italy
Verified
Purchase
5 .0
2025-10-26
Solid CWDM modules for our remote cell site backhaul links. TX power and RX sensitivity sit right where they should, and operating temperatures stay low inside our indoor server cabinet.
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491815
454498
L***d
Belgium
Verified
Purchase
5 .0
2025-09-23
We bench-tested a batch of these 1510nm 20km CWDM SFP transceivers with our optical spectrum analyzer before field deployment. The center wavelength locked in accurately with a clean laser output that aligns perfectly with standard CWDM grid spacing. Across an 18km single-mode fiber span, the module delivered rock-solid 1.25Gbps throughput with zero frame loss during full-load stress testing. Real-time DDM optical power reporting matched our external power meters closely, making this a very dependable optic for high-density enterprise links.
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491815
454490
M***s
Norway
Verified
Purchase
5 .0
2025-08-02
Used this 1.25G CWDM SFP transceiver to connect an edge node across town. The signal is clean, latency is stable, and we haven't seen a single dropped frame after weeks of continuous traffic.
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491815
454500
C***n
South Africa
Verified
Purchase
5 .0
2025-07-09
Accurate 1510nm wavelength channel. We combined it with passive CWDM filters across a 15km fiber span, and insertion loss stayed well within our expected limits.
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491815
454513
J***n
Sweden
Verified
Purchase
5 .0
2025-05-29
Needed a dedicated 1510nm channel to expand capacity over an existing 12km single-mode line. The duplex LC patch cables clicked right in, and the switch accepted the module immediately without any configuration issues.
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491815
454497
S***r
Russian Federation
Verified
Purchase
5 .0
2025-04-04
Ordered a batch for our metro network expansion. Standard duplex LC connectors fit securely into the patch panels, and the modules run well within standard commercial temperature limits.
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character.
491815
454489
E***g
Poland
Verified
Purchase
5 .0
2025-03-05
We integrated these 1510nm SFP optical modules into our multi-channel passive CWDM multiplexer setup to expand dark fiber capacity between server rooms. Hot-swapping was smooth with zero port flapping on neighboring channels, and the duplex LC interface clicked firmly into place. The transceiver maintains strong optical link margins against patch panel insertion losses while feeding live voltage, bias current, and temperature metrics straight into our monitoring dashboard. It performs on par with original manufacturer optics at a fraction of the cost.
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491815
454510
C***n
Indonesia
Verified
Purchase
5 .0
2025-02-24
We track all fiber links via the DDM function. These 1G SFP transceivers report accurate real-time voltage, bias current, and power levels, making routine maintenance simple.
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