LS-CW291G-80C operates as a 1290nm CWDM SFP module that sustains 1.25Gbps data rates over a single-mode fiber reach of 80km, built around a DFB laser and a PIN photodiode. The thermal range spans 0 to +70°C, while integrated digital monitoring furnishes real-time optical parameters — bias current, temperature, voltage, and optical power — with calibrated accuracy.
LINK-PP Part Number
LS-CW291G-80C
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1290nm
Max Cable Distance
80km
Connector
Duplex LC
Media
SMF
Transmitter Type
DFB
Receiver Type
PIN
TX Power
-1 to +4dBm
RX Power
-26 to -1dBm
Receiver Sensitivity
-26dBm
Receiver Overload
-1dBm
EMC (Electromagnetic Compatibility)
Supported
DOM Support
Yes
Operating Temperature Range
0 to 70°C
Protocols
SFP MSA、SFF-8472
Key Features of LINK-PP LS-CW291G-80C 1G SFP
LINK-PP LS-CW291G-80C is a commercial-grade 1290nm CWDM SFP module that delivers 1Gbps data rates over single-mode fiber up to 80km. It incorporates a duplex LC optical interface, real-time digital optical monitoring (DOM), and full compliance with the SFP MSA standard. The hot-pluggable form factor enables easy installation and field replacement without system interruption.
LINK-PP LS-CW291G-80C 1G SFP Optical Module
This optical module adopts the standard hot-pluggable SFP footprint, allowing direct insertion into any SFP-compliant port. Its electrical and mechanical interfaces are fully aligned with the SFP MSA, ensuring interoperability with a wide range of host equipment.
LS-CW291G-80C: 1 Gbps Connectivity for Regional Long-Haul Links
Designed for regional long-haul backbones, this transceiver provides a 1Gbps throughput over extended network spans. Its stable data rate ensures that traffic flows smoothly across point-to-point trunks, with minimal variation in latency under normal operating conditions.
LS-CW291G-80C Module with CWDM Technology for Fiber Efficiency
The CWDM approach multiplexes multiple wavelength channels onto a single fiber, significantly reducing the need for additional fiber strands. This technology maximizes existing infrastructure capacity, lowering both deployment costs and cable plant complexity.
LS-CW291G-80C Module with 1290nm Wavelength
The 1290nm wavelength sits within the CWDM spectrum and delivers a good combination of relatively low dispersion and manageable loss over single-mode fiber. Its adoption leverages the inherent optical properties of this band, supporting clean eye patterns and stable power budgets for the link.
LS-CW291G-80C Module Supporting 80km Transmission
The transmission distance reaches up to 80km over single-mode fiber without requiring external amplification or dispersion compensation. This reach is achieved through the DFB laser’s optical output power and the PIN receiver’s sensitivity, ensuring reliable link closure at the specified bit rate.
LS-CW291G-80C Module with Duplex LC Interface
The duplex LC connector provides a compact, snap-in locking mechanism that ensures secure fiber mating and low insertion loss. This industry-standard interface facilitates quick patching and is compatible with most optical distribution frames and patch panels.
LS-CW291G-80C Module with DOM for Real-Time Monitoring
The DOM (Digital Optical Monitoring) function continuously tracks key operating parameters, including transmitter bias current, receiver optical power, supply voltage, and internal temperature. These real-time readings allow network administrators to proactively detect link degradation and troubleshoot faults remotely via the host management bus.
LINK-PP LS-CW291G-80C 1G SFP Certification
The LS-CW291G-80C 1G SFP module complies with major international industry standards, including ISO 9001, CE, RoHS, and FCC. These certifications confirm that the manufacturing process meets strict quality, electromagnetic safety, and environmental protection requirements.
Every transceiver module undergoes rigorous hardware evaluations, including the eye pattern test, bit error rate test, and temperature test. These procedures verify signal integrity and operational stability under varying working conditions.
LS-CW291G-80C Quality Certifications
Official compliance documentation confirms the optical module meets rigorous safety, environmental, and quality control benchmarks. These industry credentials ensure the product satisfies all standard regulatory requirements for commercial 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-CW291G-80C Certified for Reliable Host-Device Compatibility
The transceiver's EEPROM is pre-programmed and validated across various network switches, routers, and media converters. This process ensures accurate hardware recognition and stable data link establishment upon installation.
Rigorous Testing Ensures Reliable SFP Performance
Every LS-CW291G-80C 1G SFP transceiver undergoes strict physical-layer checks to guarantee signal stability. Discover the complete validation methodology at the LINK-PP Test Support Center.
Optical Spectrum Test
Measure central wavelength and spectral width to ensure compliance with optical standards.
Eye Pattern Test
Analyze optical signal quality and noise margins to confirm clean waveform transmission.
Bit Error Rate Test
Evaluate data transmission accuracy under full line-rate traffic to prevent packet loss.
Temperature Test
Verify operational stability and thermal tolerance across specified operating temperature ranges.
Product Shipping for LINK-PP LS-CW291G-80C 1G SFP
Orders are securely packaged and handled to protect LS-CW291G-80C 1G SFP optical transceivers during transit. Reliable delivery channels ensure products arrive safely at global destinations.
Anti-Static Protective Packaging
Prevent electrostatic discharge damage during handling and transport.
Shock-Resistant Transport Protection
Absorb mechanical impacts during transit to safeguard internal components.
Fast Order Processing and Dispatch
Prepare and dispatch inventory promptly to minimize fulfillment lead times.
Global Logistics and International Delivery
Partner with reliable international carriers to provide secure and efficient shipment.
LINK-PP LS-CW291G-80C 1G SFP Usage Demonstration
Plug the LS-CW291G-80C module into your switch port, attach single-mode fiber LC patch cords, and verify port status. Optimized for long-reach CWDM applications, it transmits specific 1290nm optical channels to maximize bandwidth capacity across long-distance regional trunking and campus interconnects.
LS-CW291G-80C 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-80C 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:
No. CWDM uses 20nm optical channel spacing to keep each wavelength physically isolated. The transceiver performs purely physical optical-electrical conversion with zero packet buffering, ensuring zero cross-talk and ultra-low, protocol-independent latency for both SAN and Ethernet links. By
admin
A:
Absolutely. The module features a hot-pluggable SFP footprint, allowing live insertion or replacement in active switches or media converters without disrupting adjacent ports or requiring chassis reboots. By
admin
A:
Under typical operating conditions (0 to 70°C), the internal DFB laser maintains wavelength stability strictly within the ITU-T G.694.2 CWDM grid tolerance (±6.5nm at 1290nm), even in fully populated switch panels, ensuring no out-of-spec drift. By
admin
A:
The LS-CW291G-80C CWDM module strictly complies with the ITU-T G.694.2 grid (1290nm ±6.5nm spectral window). It integrates seamlessly into 20nm-spaced CWDM Mux/Demux filters. In link budget planning, you should allocate 1.5 to 3.0 dB per side for Mux/Demux insertion loss, plus roughly 0.5 dB per patch panel. By
admin
A:
Yes. We can pre-code the transceivers for your specific switch brands prior to dispatch and archive your custom coding profile. This guarantees seamless, plug-and-play compatibility across all your POP deployments without triggering port errors. By
admin
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492488
446779
W***w
Macao
Verified
Purchase
5 .0
2026-05-18
Bought a batch for a small ISP backhaul; the duplex LC interface mates cleanly with our existing patch panels and the 80km rating gives us plenty of margin on 60-75km runs.
Please write comments with more than three
character.
492488
446761
R***e
Argentina
Verified
Purchase
5 .0
2026-02-10
Ordered a pair of these 1290nm CWDM SFP modules for a remote warehouse link spanning roughly 58km. Bit error rate has been rock-solid over the past three weeks, and optical budget headroom is plenty over OS2 single-mode fiber.
Please write comments with more than three
character.
492488
446776
L***n
Brazil
Verified
Purchase
5 .0
2026-01-22
In a private enterprise network, we used these SFPs to extend 1G connectivity between buildings using a simple CWDM mux/demux pair. The optical performance has been consistent across all deployed units, with clean link establishment and no unexpected resets. Having DOM available on every port simplifies troubleshooting and reduces the need for external test gear during changes. The 80km class rating means we can reuse the same stock for both short and medium-distance links without worrying about spec mismatches.
Please write comments with more than three
character.
492488
446767
P***m
Iran, Islamic Republic of
Verified
Purchase
5 .0
2025-09-26
For a cost-effective 1G CWDM SFP, the build quality feels good; labeling is clear (P/N LS-CW291G-80C, 1290nm) and the form factor fits standard SFP cages.
Please write comments with more than three
character.
492488
446774
Z***y
Libyan Arab Jamahiriya
Verified
Purchase
5 .0
2025-08-21
We use these LS-CW291G-80C modules for our 1G CWDM ring across several buildings; 1290nm channel fits our MUX plan perfectly and the DOM data helps us track link health without extra tools.
Please write comments with more than three
character.
492488
446768
L***m
Australia
Verified
Purchase
5 .0
2025-08-14
We deployed these modules in a metro CWDM ring for a municipal network, connecting offices and facilities over existing single-mode fiber. The 1290nm channel slots neatly into our wavelength plan, and the links have been stable through daily traffic peaks. DOM data helps our operations team prioritize maintenance, especially on longer spans where margin is tighter. Installation was quick, with no special commands needed on the switches we use. For a city-wide 1G backbone, this transceiver delivers the reliability and visibility we require.
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character.
492488
446763
S***n
United Arab Emirates
Verified
Purchase
5 .0
2025-07-02
Our procurement team likes that these are listed as compatible with major vendors; we’ve had no interoperability flags in mixed-brand environments so far.
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character.
492488
446775
P***r
Japan
Verified
Purchase
5 .0
2025-05-27
Needed an economical 80km Gigabit SFP solution for a site-to-site backup link. EEPROM compatibility coding matched our aggregation switches without any port blocking warnings.
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character.
492488
446760
F***w
Maldives
Verified
Purchase
5 .0
2025-04-16
We monitor temperature and optical power via the DOM function; readings are consistent and the module stays within the 0-70°C commercial range in our climate-controlled racks.
Please write comments with more than three
character.
492488
446771
K***d
Mexico
Verified
Purchase
4 .0
2025-04-03
Excellent 80km CWDM SFP module with clean DOM data; the only hiccup was that the customs paperwork had a minor typo in the description. It didn’t affect the product, but it did delay clearance by a day. Everything else was perfect.
Please write comments with more than three
character.
492488
446786
M***y
Canada
Verified
Purchase
5 .0
2025-03-19
We used a pair of these LS-CW291G-80C 1G CWDM optical transceivers to connect two 1G switches over a dedicated SMF path for a critical NAS and backup network. The duplex LC interface made cabling clean and predictable, and DOM let us validate the entire link budget end-to-end. Under continuous file transfers and virtualization traffic, the connection stayed stable with no drops or retransmissions. It’s reassuring to have optical monitoring built in, so we can spot degradation before it becomes an outage. For a small but important fiber segment, this module hits the right balance of performance and price.
Please write comments with more than three
character.
492488
446765
M***s
France
Verified
Purchase
5 .0
2025-01-22
In a small ISP backhaul use case, these modules sit behind a passive CWDM mux and handle long-haul SMF runs with plenty of margin. The optical performance feels consistent across the batch, with clean handshakes and stable link states on all ports. We rely on DOM for proactive maintenance, and the readings line up well with our link budget expectations. No special configuration was required on the switches we tested, which sped up the rollout.
Please write comments with more than three
character.
492488
446762
K***r
India
Verified
Purchase
4 .0
2024-12-17
No issues with optical performance or DOM readings; the only downside was that the shipping took two days longer than the estimated window. The module was securely packed and deployed without problems. Would still recommend, but logistics could be tighter.
Please write comments with more than three
character.
492488
446772
O***y
United States
Verified
Purchase
5 .0
2024-11-26
Integrated these into our regional CWDM passive filter system. Clean 1290nm pass-through with minimal insertion loss, and DOM temperature values stay stable inside indoor rack environments.
Please write comments with more than three
character.
492488
446766
L***y
Morocco
Verified
Purchase
5 .0
2024-10-22
For a commercial-temp (0-70°C) indoor deployment, these SFPs have been rock solid; TX power sits around -1 to +4 dBm and receiver sensitivity down to -26 dBm as specified.
Please write comments with more than three
character.
492488
446769
N***s
United Kingdom
Verified
Purchase
5 .0
2024-10-11
We rolled these 1G CWDM 1290nm SFP transceiver modules into a multi-site campus ring, and the links have been rock solid under real production load. DOM telemetry gives our NOC clear visibility without extra probes, and the 80km class rating covers all our current and planned hops. Deployment was straightforward with standard duplex LC patching on SMF, and we haven’t seen any flapping or error spikes. The commercial temperature range fits our climate-controlled rooms perfectly. For a cost-effective CWDM transceiver, the stability and monitoring capabilities are exactly what we needed.
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CWDM/DWDM SFP","gid":27041,"urlname":"1g_cwdm_dwdm_sfp"},"feedbacks":{"list":[{"id":30524,"cid":752,"pid":492488,"bid":0,"author":"X***y","question":"Will multiplexing 1G Ethernet and 1G Fiber Channel over adjacent CWDM channels cause any cross-talk or packet latency between IP and SAN networks?","responder":"admin","responder_uid":0,"answer":"No. CWDM uses 20nm optical channel spacing to keep each wavelength physically isolated. The transceiver performs purely physical optical-electrical conversion with zero packet buffering, ensuring zero cross-talk and ultra-low, protocol-independent latency for both SAN and Ethernet links.","status":1,"isread":1,"sisread":1,"ip":"","country_code":"0","addtime":"2026-05-10","uptime":"2026-05-11","domain":""},{"id":30520,"cid":752,"pid":492488,"bid":0,"author":"Z***e","question":"If we replace existing legacy 1G CWDM modules with the LS-CW291G-80C on a live switch stack, is hot-swapping fully safe without rebooting line cards?","responder":"admin","responder_uid":0,"answer":"Absolutely. The module features a hot-pluggable SFP footprint, allowing live insertion or replacement in active switches or media converters without disrupting adjacent ports or requiring chassis reboots.","status":1,"isread":1,"sisread":1,"ip":"","country_code":"0","addtime":"2026-03-13","uptime":"2026-03-14","domain":""},{"id":30522,"cid":752,"pid":492488,"bid":0,"author":"V***n","question":"Will high switch port density cause internal thermal throttling or laser wavelength drift on the 1290nm channel?","responder":"admin","responder_uid":0,"answer":"Under typical operating conditions (0 to 70°C), the internal DFB laser maintains wavelength stability strictly within the ITU-T G.694.2 CWDM grid tolerance (±6.5nm at 1290nm), even in fully populated switch panels, ensuring no out-of-spec drift.","status":1,"isread":1,"sisread":1,"ip":"","country_code":"0","addtime":"2026-01-26","uptime":"2026-01-27","domain":""},{"id":30523,"cid":752,"pid":492488,"bid":0,"author":"W***e","question":"How does the channel passband tolerance on this 1290nm DFB laser align with standard 20nm-spaced CWDM filters, and what MUX insertion loss should we budget for?","responder":"admin","responder_uid":0,"answer":"The LS-CW291G-80C CWDM module strictly complies with the ITU-T G.694.2 grid (1290nm ±6.5nm spectral window). It integrates seamlessly into 20nm-spaced CWDM Mux/Demux filters. In link budget planning, you should allocate 1.5 to 3.0 dB per side for Mux/Demux insertion loss, plus roughly 0.5 dB per patch panel.","status":1,"isread":1,"sisread":1,"ip":"","country_code":"0","addtime":"2025-12-03","uptime":"2025-12-04","domain":""},{"id":30521,"cid":752,"pid":492488,"bid":0,"author":"S***m","question":"We run a multi-vendor network (Cisco, Juniper, Dell, etc.) across remote POP sites. Can you pre-program the LS-CW291G-80C with vendor-specific EEPROM code so it works out of the box on future repeat orders?","responder":"admin","responder_uid":0,"answer":"Yes. We can pre-code the transceivers for your specific switch brands prior to dispatch and archive your custom coding profile. This guarantees seamless, plug-and-play compatibility across all your POP deployments without triggering port errors.","status":1,"isread":1,"sisread":1,"ip":"","country_code":"0","addtime":"2025-08-08","uptime":"2025-08-09","domain":""}],"count":5,"curpageno":1,"pagenum":1},"packInfo":{"pid":492488,"ftid":912,"weight":"0.0500","length":"0.00","width":"0.00","height":"0.00","customized":0,"firstnum":0,"addnum":0,"addweight":"0.0000"},"comment":{"pic_comment":0,"count":27,"avg_rating":4.9,"star1":0,"star2":0,"star3":0,"star4":7,"star5":93,"list":[{"review_id":446779,"cid":752,"product_id":492488,"bid":0,"user":{"name":"N***h","country":"Germany","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Clean wavelength separation on our 8-channel multiplexer. 1290nm channel does not bleed into adjacent CWDM spectrum bands. Good engineering quality.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":80,"attachments":"","anonymity":1,"date_added":"2026-06-21","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446770,"cid":752,"product_id":492488,"bid":0,"user":{"name":"W***w","country":"Macao","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Bought a batch for a small ISP backhaul; the duplex LC interface mates cleanly with our existing patch panels and the 80km rating gives us plenty of margin on 60-75km runs.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":95,"attachments":"","anonymity":1,"date_added":"2026-05-18","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446764,"cid":752,"product_id":492488,"bid":0,"user":{"name":"C***n","country":"Belarus","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Packaging was fine; the module arrived ready to deploy.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":60,"attachments":"","anonymity":1,"date_added":"2026-04-29","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446773,"cid":752,"product_id":492488,"bid":0,"user":{"name":"Q***e","country":"Bangladesh","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"We run these in an indoor data hall feeding remote sites; 80km class rating means we can reuse existing long-haul fiber without worrying about margin.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":94,"attachments":"","anonymity":1,"date_added":"2026-03-14","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446761,"cid":752,"product_id":492488,"bid":0,"user":{"name":"J***n","country":"Hungary","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Clean link on SMF duplex LC, DDM readings look spot-on.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":50,"attachments":"","anonymity":1,"date_added":"2026-02-24","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446776,"cid":752,"product_id":492488,"bid":0,"user":{"name":"R***e","country":"Argentina","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Ordered a pair of these 1290nm CWDM SFP modules for a remote warehouse link spanning roughly 58km. Bit error rate has been rock-solid over the past three weeks, and optical budget headroom is plenty over OS2 single-mode fiber.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":99,"attachments":"","anonymity":1,"date_added":"2026-02-10","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446784,"cid":752,"product_id":492488,"bid":0,"user":{"name":"L***n","country":"Brazil","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"In a private enterprise network, we used these SFPs to extend 1G connectivity between buildings using a simple CWDM mux/demux pair. The optical performance has been consistent across all deployed units, with clean link establishment and no unexpected resets. Having DOM available on every port simplifies troubleshooting and reduces the need for external test gear during changes. The 80km class rating means we can reuse the same stock for both short and medium-distance links without worrying about spec mismatches.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":125,"attachments":"","anonymity":1,"date_added":"2026-01-22","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446767,"cid":752,"product_id":492488,"bid":0,"user":{"name":"O***e","country":"Lithuania","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Accurate 1290nm channel grid alignment, fits our passive CWDM Mux perfectly.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":91,"attachments":"","anonymity":1,"date_added":"2026-01-18","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446774,"cid":752,"product_id":492488,"bid":0,"user":{"name":"P***m","country":"Iran, Islamic Republic of","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"For a cost-effective 1G CWDM SFP, the build quality feels good; labeling is clear (P/N LS-CW291G-80C, 1290nm) and the form factor fits standard SFP cages.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":87,"attachments":"","anonymity":1,"date_added":"2025-09-26","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446768,"cid":752,"product_id":492488,"bid":0,"user":{"name":"Z***y","country":"Libyan Arab Jamahiriya","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"We use these LS-CW291G-80C modules for our 1G CWDM ring across several buildings; 1290nm channel fits our MUX plan perfectly and the DOM data helps us track link health without extra tools.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":118,"attachments":"","anonymity":1,"date_added":"2025-08-21","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446783,"cid":752,"product_id":492488,"bid":0,"user":{"name":"L***m","country":"Australia","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"We deployed these modules in a metro CWDM ring for a municipal network, connecting offices and facilities over existing single-mode fiber. The 1290nm channel slots neatly into our wavelength plan, and the links have been stable through daily traffic peaks. DOM data helps our operations team prioritize maintenance, especially on longer spans where margin is tighter. Installation was quick, with no special commands needed on the switches we use. For a city-wide 1G backbone, this transceiver delivers the reliability and visibility we require.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":139,"attachments":"","anonymity":1,"date_added":"2025-08-14","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446763,"cid":752,"product_id":492488,"bid":0,"user":{"name":"R***e","country":"Bulgaria","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Plug-and-play in our edge switches, no coding issues.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":63,"attachments":"","anonymity":1,"date_added":"2025-07-11","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446775,"cid":752,"product_id":492488,"bid":0,"user":{"name":"S***n","country":"United Arab Emirates","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Our procurement team likes that these are listed as compatible with major vendors; we’ve had no interoperability flags in mixed-brand environments so far.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":128,"attachments":"","anonymity":1,"date_added":"2025-07-02","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446778,"cid":752,"product_id":492488,"bid":0,"user":{"name":"P***r","country":"Japan","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Needed an economical 80km Gigabit SFP solution for a site-to-site backup link. EEPROM compatibility coding matched our aggregation switches without any port blocking warnings.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":100,"attachments":"","anonymity":1,"date_added":"2025-05-27","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446760,"cid":752,"product_id":492488,"bid":0,"user":{"name":"T***k","country":"Israel","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Solid 1290nm CWDM 1G SFP, 80km reach with DOM — exactly what we needed.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":49,"attachments":"","anonymity":1,"date_added":"2025-05-03","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446771,"cid":752,"product_id":492488,"bid":0,"user":{"name":"F***w","country":"Maldives","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"We monitor temperature and optical power via the DOM function; readings are consistent and the module stays within the 0-70°C commercial range in our climate-controlled racks.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":121,"attachments":"","anonymity":1,"date_added":"2025-04-16","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446786,"cid":752,"product_id":492488,"bid":0,"user":{"name":"K***d","country":"Mexico","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Excellent 80km CWDM SFP module with clean DOM data; the only hiccup was that the customs paperwork had a minor typo in the description. It didn’t affect the product, but it did delay clearance by a day. Everything else was perfect.","rating":4,"status":1,"isread":1,"type":0,"helpfulvote":34,"attachments":"","anonymity":1,"date_added":"2025-04-03","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446782,"cid":752,"product_id":492488,"bid":0,"user":{"name":"M***y","country":"Canada","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"We used a pair of these LS-CW291G-80C 1G CWDM optical transceivers to connect two 1G switches over a dedicated SMF path for a critical NAS and backup network. The duplex LC interface made cabling clean and predictable, and DOM let us validate the entire link budget end-to-end. Under continuous file transfers and virtualization traffic, the connection stayed stable with no drops or retransmissions. It’s reassuring to have optical monitoring built in, so we can spot degradation before it becomes an outage. For a small but important fiber segment, this module hits the right balance of performance and price.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":155,"attachments":"","anonymity":1,"date_added":"2025-03-19","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446765,"cid":752,"product_id":492488,"bid":0,"user":{"name":"I***r","country":"Brunei Darussalam","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Happy with the 80km SMF performance so far. ","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":78,"attachments":"","anonymity":1,"date_added":"2025-03-08","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446781,"cid":752,"product_id":492488,"bid":0,"user":{"name":"M***s","country":"France","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"In a small ISP backhaul use case, these modules sit behind a passive CWDM mux and handle long-haul SMF runs with plenty of margin. The optical performance feels consistent across the batch, with clean handshakes and stable link states on all ports. We rely on DOM for proactive maintenance, and the readings line up well with our link budget expectations. No special configuration was required on the switches we tested, which sped up the rollout.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":148,"attachments":"","anonymity":1,"date_added":"2025-01-22","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446762,"cid":752,"product_id":492488,"bid":0,"user":{"name":"N***r","country":"Denmark","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Great value for a commercial-grade 1G CWDM SFP transceiver.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":67,"attachments":"","anonymity":1,"date_added":"2024-12-21","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446785,"cid":752,"product_id":492488,"bid":0,"user":{"name":"K***r","country":"India","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"No issues with optical performance or DOM readings; the only downside was that the shipping took two days longer than the estimated window. The module was securely packed and deployed without problems. Would still recommend, but logistics could be tighter.","rating":4,"status":1,"isread":1,"type":0,"helpfulvote":30,"attachments":"","anonymity":1,"date_added":"2024-12-17","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446772,"cid":752,"product_id":492488,"bid":0,"user":{"name":"T***y","country":"Nepal","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Used in a CWDM Mux/Demux setup for a metro link; 1290nm channel is stable, no wavelength drift noticed over a few weeks of continuous traffic.","rating":5,"status":1,"isread":1,"type":0,"helpfulvote":102,"attachments":"","anonymity":1,"date_added":"2024-12-05","date_modified":"2026-08-25 01:28:01","is_delete":0,"attachment_arr":[],"replies":[]},{"review_id":446777,"cid":752,"product_id":492488,"bid":0,"user":{"name":"O***y","country":"United States","head_img":"","reply_html":"","reply_num":0},"parent_review_id":0,"topic":"","text":"Integrated these into our regional CWDM passive filter system. 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transmission distance with SMF."},"discountcode_list":[{"word":"For Order Over 00 Get .00 Off","discount_code":"Linkpp15","id":129,"switch":true},{"word":"For Order Over 00 Get .00 Off","discount_code":"Linkpp50","id":145,"switch":true},{"word":"For Order Over 00 Get 0.00 Off","discount_code":"Linkpp100","id":146,"switch":true},{"word":"New Users: Coupon for Orders","discount_code":"linkpp2610","id":166,"switch":true}],"tags":[{"url":"/supplier-1g-sfp-cwdm.htm","name":"1G SFP CWDM"},{"url":"/supplier-optical-transceiver.htm","name":"Optical Transceiver"},{"url":"/supplier-sfp-module.htm","name":"SFP Module"},{"url":"/supplier-1g-sfp.htm","name":"1G SFP"},{"url":"/supplier-sfp-transceivers.htm","name":"SFP transceivers"}],"skuPics":[],"contentModules":[{"id":63458,"title":"Key Features of LINK-PP LS-CW291G-80C 1G SFP","tab_title":"Features","content":"
Key Features of LINK-PP LS-CW291G-80C 1G SFP
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LINK-PP LS-CW291G-80C is a commercial-grade 1290nm CWDM SFP module that delivers 1Gbps data rates over single-mode fiber up to 80km. It incorporates a duplex LC optical interface, real-time digital optical monitoring (DOM), and full compliance with the SFP MSA standard. The hot-pluggable form factor enables easy installation and field replacement without system interruption.
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LINK-PP LS-CW291G-80C 1G SFP Optical Module
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This optical module adopts the standard hot-pluggable SFP footprint, allowing direct insertion into any SFP-compliant port. Its electrical and mechanical interfaces are fully aligned with the SFP MSA, ensuring interoperability with a wide range of host equipment.
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LS-CW291G-80C: 1 Gbps Connectivity for Regional Long-Haul Links
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Designed for regional long-haul backbones, this transceiver provides a 1Gbps throughput over extended network spans. Its stable data rate ensures that traffic flows smoothly across point-to-point trunks, with minimal variation in latency under normal operating conditions.
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LS-CW291G-80C Module with CWDM Technology for Fiber Efficiency
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The CWDM approach multiplexes multiple wavelength channels onto a single fiber, significantly reducing the need for additional fiber strands. This technology maximizes existing infrastructure capacity, lowering both deployment costs and cable plant complexity.
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LS-CW291G-80C Module with 1290nm Wavelength
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The 1290nm wavelength sits within the CWDM spectrum and delivers a good combination of relatively low dispersion and manageable loss over single-mode fiber. Its adoption leverages the inherent optical properties of this band, supporting clean eye patterns and stable power budgets for the link.
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LS-CW291G-80C Module Supporting 80km Transmission
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The transmission distance reaches up to 80km over single-mode fiber without requiring external amplification or dispersion compensation. This reach is achieved through the DFB laser’s optical output power and the PIN receiver’s sensitivity, ensuring reliable link closure at the specified bit rate.
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LS-CW291G-80C Module with Duplex LC Interface
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The duplex LC connector provides a compact, snap-in locking mechanism that ensures secure fiber mating and low insertion loss. This industry-standard interface facilitates quick patching and is compatible with most optical distribution frames and patch panels.
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LS-CW291G-80C Module with DOM for Real-Time Monitoring
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The DOM (Digital Optical Monitoring) function continuously tracks key operating parameters, including transmitter bias current, receiver optical power, supply voltage, and internal temperature. These real-time readings allow network administrators to proactively detect link degradation and troubleshoot faults remotely via the host management bus.
The LS-CW291G-80C 1G SFP module complies with major international industry standards, including ISO 9001, CE, RoHS, and FCC. These certifications confirm that the manufacturing process meets strict quality, electromagnetic safety, and environmental protection requirements.
Every transceiver module undergoes rigorous hardware evaluations, including the eye pattern test, bit error rate test, and temperature test. These procedures verify signal integrity and operational stability under varying working conditions.
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LS-CW291G-80C Quality Certifications
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Official compliance documentation confirms the optical module meets rigorous safety, environmental, and quality control benchmarks. These industry credentials ensure the product satisfies all standard regulatory requirements for commercial deployment.
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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.
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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.
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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.
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ISO 45001 is a global standard that sets out the requirements for an occupational health and safety management system (OH&SMS).
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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.
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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.
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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.
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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.
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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.
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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.
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LS-CW291G-80C Certified for Reliable Host-Device Compatibility
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The transceiver's EEPROM is pre-programmed and validated across various network switches, routers, and media converters. This process ensures accurate hardware recognition and stable data link establishment upon installation.
Every LS-CW291G-80C 1G SFP transceiver undergoes strict physical-layer checks to guarantee signal stability. Discover the complete validation methodology at the LINK-PP Test Support Center.
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Optical Spectrum Test
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Measure central wavelength and spectral width to ensure compliance with optical standards.
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Eye Pattern Test
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Analyze optical signal quality and noise margins to confirm clean waveform transmission.
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Bit Error Rate Test
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Evaluate data transmission accuracy under full line-rate traffic to prevent packet loss.
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Temperature Test
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Verify operational stability and thermal tolerance across specified operating temperature ranges.
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Product Shipping for LINK-PP LS-CW291G-80C 1G SFP
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Orders are securely packaged and handled to protect LS-CW291G-80C 1G SFP optical transceivers during transit. Reliable delivery channels ensure products arrive safely at global destinations.
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Anti-Static Protective Packaging
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Prevent electrostatic discharge damage during handling and transport.
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Shock-Resistant Transport Protection
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Absorb mechanical impacts during transit to safeguard internal components.
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Fast Order Processing and Dispatch
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Prepare and dispatch inventory promptly to minimize fulfillment lead times.
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Global Logistics and International Delivery
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Partner with reliable international carriers to provide secure and efficient shipment.
Plug the LS-CW291G-80C module into your switch port, attach single-mode fiber LC patch cords, and verify port status. Optimized for long-reach CWDM applications, it transmits specific 1290nm optical channels to maximize bandwidth capacity across long-distance regional trunking and campus interconnects.
LINK-PP offers end-to-end technical support, from pre-sales consultation to post-deployment assistance, ensuring smooth integration and reliable network performance.
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Pre-Sales Technical Consultation
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Professional guidance to help you select the optimal LS-CW291G-80C module for your network design and application needs.
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Compatibility Verification Support
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Validated compatibility with LINK-PP switches and other mainstream networking platforms for seamless deployment.
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Deployment & Installation Assistance
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Comprehensive step-by-step guidance for installation, configuration, and initial setup, ensuring accurate deployment and reliable, stable operation from the start.
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Long-Term Technical Assurance
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Ongoing technical support throughout the product lifecycle, delivering long-term stability for enterprise and carrier-grade networks.
Canada · English · CAD
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