LS-CW591G-20C is a 1G SFP CWDM optical module designed for reliable single-mode fiber (SMF) data communications. Utilizing a 1590nm CWDM DFB laser paired with a PIN photo detector, it supports data rates up to 1.25Gbps over distances reaching 20km. It features real-time Digital Optical Monitoring (DOM) for easy system diagnostics and operates within a standard commercial temperature range of 0°C to +70°C.
LINK-PP Part Number
LS-CW591G-20C
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1590nm
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
DOM Support
Supported
Operating Temperature Range
0 to 70°C
Protocols
SFP MSA、SFF-8472
Key Features of LINK-PP LS-CW591G-20C 1G SFP
LINK-PP LS-CW591G-20C is a commercial-grade 1G CWDM SFP optical transceiver that maximizes fiber efficiency by multiplexing a 1590nm channel over 20km single-mode fiber links. Featuring an MSA-compliant hot-pluggable form factor, a duplex LC interface, and SFF-8472 DOM support, it delivers a versatile, real-time monitored solution for extended campus networks.
LINK-PP LS-CW591G-20C 1G SFP Optical Module
Designed with a hot-pluggable SFP footprint, this optical module allows easy installation and replacement without powering down host systems. Full compliance with the SFP Multi-Source Agreement (MSA) guarantees seamless interoperability across standard network switches and routers. This standardized physical design simplifies hardware maintenance and equipment updates.
LS-CW591G-20C: 1 Gbps Connectivity for Extended Campus Links
A stable 1Gbps data throughput rate provides reliable baseline capacity for bandwidth-intensive organizational traffic. This steady line-rate performance links distant enterprise offices, campus sub-networks, and remote distribution switches. Network planners rely on this speed to deliver dependable, non-blocking daily data transfers.
LS-CW591G-20C Module with CWDM Technology for Fiber Efficiency
Coarse Wavelength Division Multiplexing allows IT teams to consolidate multiple discrete optical channels onto existing fiber runs. Multiplexing data over specific spectral bands eliminates the need to lease or install expensive extra cabling. This efficient spectral management maximizes return on physical dark fiber investments.
LS-CW591G-20C Module with 1590nm Wavelength
Transmitting strictly on the 1590nm central channel, this module relies on an internal DFB laser to keep optical output stable and focused. The narrow spectral line limits signal dispersion across longer fiber routes. Utilizing a dedicated CWDM slot prevents spectral overlap with adjacent optical channels in dense network grids.
LS-CW591G-20C Module Supporting 20km Transmission
An optical link budget tuned for 20km allows effortless bridging of medium-distance campus topologies over single-mode fiber. The paired PIN photodiode receiver maintains clear signal sensitivity across the full reach. This native range provides ample margin against optical attenuation over long physical runs.
LS-CW591G-20C Module with Duplex LC Interface
Duplex LC optical receptacles offer tight mechanical latching along with low signal insertion loss. The dual-connector design physically isolates incoming and outgoing optical signals for robust full-duplex communication. Standardized LC geometry allows fast, reliable cable patching into existing distribution panels.
LS-CW591G-20C Module with DOM for Real-Time Monitoring
Real-time DOM capabilities provide continuous tracking of internal operational parameters like temperature, voltage, bias current, and optical power. Fully compatible with SFF-8472 digital diagnostics standards, the module transmits live telemetry directly to network management software. System administrators can easily monitor link health and identify potential fiber faults before outages occur.
LINK-PP LS-CW591G-20C 1G SFP Certification
The LS-CW591G-20C CWDM SFP module meets strict international standards including ISO 9001, CE, RoHS, and FCC certifications. These official compliance approvals ensure the optical module delivers safe, eco-friendly, and dependable operation in enterprise networks.
Every optical transceiver goes through complete factory testing to verify optical performance and signal stability before shipping. Detailed quality checks ensure each module delivers steady line-rate speeds across its full service life.
LS-CW591G-20C Quality Certifications
Global industry standards confirm that this module satisfies strict environmental, electrical, and safety requirements. Adhering to these global benchmarks guarantees consistent product quality and safe long-term deployment.
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-CW591G-20C Certified for Reliable Host-Device Compatibility
Extensive testing across major switch and router platforms ensures smooth plug-and-play installation. The module communicates seamlessly with original equipment, preventing port recognition errors or system downtime.
Rigorous Testing Ensures Reliable SFP Performance
Every LS-CW591G-20C CWDM SFP transceiver undergoes strict inspection to guarantee stable optical output and long-term network reliability. You can discover the complete validation methodology at the LINK-PP Test Support Center.
Optical Spectrum Test
Verify 1590nm central wavelength accuracy and spectral width.
Eye Pattern Test
Analyze optical signal clarity and waveform timing performance.
Bit Error Rate Test
Measure data transmission accuracy across the full link span.
Temperature Test
Ensure stable transceiver operation across commercial thermal ranges.
Product Shipping for LINK-PP LS-CW591G-20C 1G SFP
LINK-PP LS-CW591G-20C CWDM SFP modules are carefully packaged and processed to guarantee safe arrival at your destination. Reliable international shipping partners deliver your orders efficiently to support timely network deployments worldwide.
Anti-Static Protective Packaging
Protect sensitive optical components against electrostatic discharge damage.
Shock-Resistant Transport Protection
Shield the delicate optical transceiver during long-distance transit.
Fast Order Processing and Dispatch
Accelerate order fulfillment for rapid shipment to customer sites.
Global Logistics and International Delivery
Deliver reliable shipments directly to enterprise customers worldwide.
LINK-PP LS-CW591G-20C 1G SFP Usage Demonstration
LINK-PP LS-CW591G-20C SFP transceiver integrates directly into switch interfaces to expand campus fiber capacity without additional cabling. Inserting this 1590nm CWDM module into active host ports activates instant 20km link extensions, letting administrators easily manage long-distance inter-building networks with continuous DOM monitoring.
LS-CW591G-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-CW591G-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 holds CE and RoHS certifications, ensuring full regulatory compliance for the EU and global markets. It also meets standard SFP MSA hardware specifications and operates on a single +3.3V power rail. By
admin on
2026-04-24
A:
No, the module features a precision CWDM DFB laser with a narrow spectral width matching the standard 20nm channel grid, ensuring clean isolation and zero spectral bleed into adjacent wavelengths. By
admin on
2026-02-02
A:
Yes, the hot-pluggable SFP design allows you to add or replace the 1590nm channel safely without affecting other active wavelength services on the shared fiber. By
admin on
2025-11-09
A:
It requires standard single-mode fiber with a duplex LC connector interface. With a rated reach of up to 20km, it provides ample optical budget for your 15km link while accommodating normal splice and connector losses. By
admin on
2025-08-23
Deployed a dozen of these 1590nm CWDM modules across our campus fiber ring between buildings. The 20km reach covers our longest run with margin to spare, and the Duplex LC connectors seated cleanly in our patch panels. DOM gives us live temperature and optical power readings we can actually monitor. Great buy for the money.
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character.
491855
454407
C***e
Maldives
Verified
Purchase
5 .0
2026-06-11
Implemented these transceivers to establish an off-site database replication tunnel across a 15km single-mode optical path. The connection delivers ultra-low transport jitter and uninterrupted throughput, ensuring real-time database syncs without link flapping or buffer overruns.
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character.
491855
454405
H***e
Cambodia
Verified
Purchase
5 .0
2026-05-13
Integrating this 1590nm channel into our multi-channel CWDM grid was effortless. The laser exhibits a narrow spectral width with no noticeable optical crosstalk into adjacent wavelength channels. Link synchronization is instantaneous across high-density fiber patch panels under heavy peak-hour workloads.
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character.
491855
454394
F***k
Morocco
Verified
Purchase
5 .0
2026-03-25
Added these 1590nm SFP optical modules into our active multiplexing architecture to split traffic across our metropolitan distribution loop. The transmitter provides a clean, stable optical emission that slots into our optical filtering plan without disturbing nearby channels. Link budget remaining after passing multiple patch points is generous, maintaining zero packet errors during heavy daily backups.
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491855
454397
C***e
Japan
Verified
Purchase
4 .0
2026-01-21
Works perfectly on our fiber line with clean diagnostics. Delivery took longer than the estimated date because of weekend carrier sorting delays, but the product itself is great!
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491855
454412
B***e
Argentina
Verified
Purchase
5 .0
2026-01-20
Ran a full week-long field test on the LS-CW591G-20C CWDM SFP before rolling it out to our sites. The module held a clean, stable signal across our longest fiber spans, and the DOM diagnostics reported accurate temperature, voltage, and optical power the whole time — which let our NOC spot degradation early instead of waiting for outages. For a commercial-grade CWDM SFP at this price, the build quality and consistency across the batch are genuinely impressive. We've standardized on it for all our 1590nm CWDM links.
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491855
454396
A***r
Iran, Islamic Republic of
Verified
Purchase
5 .0
2025-12-06
We integrated these 1590nm CWDM optical transceivers into our regional distribution nodes to consolidate gigabit access traffic across long-haul fiber infrastructure. The DFB laser assembly maintains absolute wavelength precision during high-throughput burst periods, ensuring complete channel isolation without bleed across the optical multiplexer grid. Standard SNMP polling retrieves real-time operating metrics smoothly, while the physical duplex LC interface provides a secure, tight mechanical fit inside standard MSA-compliant SFP cages. Operating continuously across an 18km span carrying mission-critical payload data, the units have exhibited zero interface flapping and flawless transport stability, proving to be an exceptional choice for ISP-level distribution networks.
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491855
454409
I***d
Brunei Darussalam
Verified
Purchase
5 .0
2025-10-26
Used these transceivers on a suburban backhaul route carrying dedicated 1G Ethernet traffic over a 16km single-mode run. The standard commercial operating temperature (0°C to 70°C) is holding up reliably inside our climate-controlled outdoor equipment cabinet. Signal transmission is rock-solid, and the SFF-8472 digital telemetry readings are spot-on.
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491855
454392
D***n
Macao
Verified
Purchase
5 .0
2025-08-25
Running several pairs of these CWDM transceivers inside a fully loaded 1RU aggregation unit. The low electrical power draw keeps thermal dissipation minimal, preventing heat buildup across adjacent SFP ports. Optical output power is uniform across all installed units with no noticeable laser degradation over time.
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character.
491855
454393
A***t
United Arab Emirates
Verified
Purchase
5 .0
2025-07-09
We ran a thorough bench evaluation on a batch of these 1590nm CWDM SFP modules before deploying them into our metropolitan optical ring over standard single-mode fiber. Spectral analysis confirmed exact center wavelength stability within standard CWDM grid tolerances, showing zero adjacent-channel interference across our multiplexing filters. Digital optical monitoring integrates seamlessly with our telemetry tools, accurately tracking internal operating temperatures and supply voltages well within commercial thresholds. In live field production across a 17km duplex LC fiber link, the connection achieved instantaneous line-rate Gigabit Ethernet synchronization with zero CRC errors.
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491855
454408
J***e
Belarus
Verified
Purchase
5 .0
2025-06-14
Deployed these 1590nm 20km SFP modules to expand our inter-building fiber backbone over existing dark fiber strands. Passing through our passive CWDM filter channels was completely seamless, and the link established immediately without any bit errors. The laser output power remains exceptionally stable under sustained gigabit traffic. Excellent value for scaling campus aggregation links!
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491855
454398
G***g
Libyan Arab Jamahiriya
Verified
Purchase
5 .0
2025-04-04
The bail latch mechanism is well-engineered, clicking firmly into SFP cages without excessive play or loose fit. We hot-swapped several units into live aggregation switches during a scheduled maintenance window, and link negotiation was immediate with zero port flapping. Highly impressed with the build quality and optical reliability!
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character.
491855
454395
C***s
United States
Verified
Purchase
4 .0
2025-03-05
Running continuous gigabit traffic across a 16km inter-building run without a single CRC error. The delivery took two days longer than estimated because customs held the parcel for random export inspection, but the product itself is 5-star quality.
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character.
491855
454411
B***h
Nepal
Verified
Purchase
5 .0
2025-02-24
The metal housing and bail latch mechanism offer a tight, precise fit in standard SFP cages with zero mechanical wobble. We performed live hot-swaps during our routine maintenance window, and the interfaces negotiated link state immediately with flawless diagnostic reporting across the board.
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character.
491855
454406
H***h
Lithuania
Verified
Purchase
5 .0
2025-01-31
We linked two municipal branch offices separated by 14km of leased single-mode fiber using standard duplex LC patch cords. The diagnostic monitoring metrics showed internal temperatures staying well below the maximum rating inside our enclosed rack. The low power consumption design makes thermal management completely hassle-free.
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