The LINK-PP LS-CW551G-80C 1G SFP module provides reliable data transmission at speeds of up to 1.25 Gbps via SMF over distances of up to 80 km and operates at the 1550 nm CWDM wavelength to deliver strong optical output and stable, cost-effective performance.
LINK-PP Part Number
LS-CW551G-80C
Vendor Name
LINK-PP
Form Factor
SFP
Max Data Rate
1.25Gbps
Wavelength
1550nm
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
DDM/DOM
Supported
Operating Temperature Range
0 to 70°C
Protocols
SFP MSA、SFF-8472
Key Features of LINK-PP LS-CW551G-80C 1G SFP
The LINK-PP LS-CW551G-80C module ensures plug-and-play installability and dependable long-distance connectivity. With its duplex LC interface, CWDM technology, and DDM feature, it provides an efficient and scalable solution for expanding Gigabit networks, enhancing fiber capacity while maintaining superior signal integrity over long distances.
LINK-PP LS-CW551G-80C 1G SFP Optical Module
The LINK-PP LS-CW551G-80C 1G SFP optical module is outfitted with a CWDM DFB laser and a PIN photodetector, yielding dependable performance for long-haul deployments requiring consistent strength and low loss.
LS-CW551G-80C: Reliable 1.25 Gbps Connectivity for Network Expansion
With support for 1.25 Gbps Gigabit Ethernet connectivity, this LINK-PP LS-CW551G-80C module is ideal for enterprise backbones, metro networks, and service provider infrastructure, increasing bandwidth capacity and offering a straightforward route to scalable network expansion.
LS-CW551G-80C Module with CWDM Technology for Fiber Efficiency
Using the Coarse Wavelength Division Multiplexing (CWDM) technique, multiple data streams can travel on a single fiber strand at different light wavelengths. This boosts fiber utilization and cuts the need for additional cables.
LS-CW551G-80C Module with 1550nm Wavelength
The LINK-PP LS-CW551G-80C module uses a 1550nm low-attenuation transmission window to minimize signal degradation and maintain stable performance over long fiber distances.
LS-CW551G-80C Module Supporting 80km Transmission
This LINK-PP LS-CW551G-80C 1G SFP transceiver, designed for long-haul applications, is capable of transmitting to 80km over standard single-mode fiber. It is ideal for campus backbones, metro core links, and industrial networks that require high reach and reliability.
LS-CW551G-80C Module with Duplex LC Interface
The LINK-PP LS-CW551G-80C module, which utilizes a standard duplex LC connector, is easy to install and does not require any special tools. It fits seamlessly into common fiber frameworks, simplifying upgrades and maintenance tasks.
LS-CW551G-80C Module with DDM for Real-Time Monitoring
Thanks to its Digital Diagnostic Monitoring (DDM) function, the LINK-PP LS-CW551G-80C module delivers real-time feedback on module temperature, voltage, and optical power levels, empowering proactive management and maintenance of optical links.
LINK-PP LS-CW551G-80C 1G SFP Certification
All LINK-PP optical modules comply with ISO 9001 standards and are CE, RoHS, and FCC certified to global compliance with safety, environmental, and performance standards.
Before leaving the factory, each LINK-PP module undergoes a thorough optical evaluation, ensuring consistent and dependable performance.
LS-CW551G-80C Quality Certifications
LINK-PP maintains rigorous quality assurance protocols. Each unit is thoroughly tested to ensure it meets the reliability and durability requirements of high-performance network systems.
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-CW551G-80C Certified for Reliable Host-Device Compatibility
Comprehensive interoperability testing guarantees seamless integration with LINK-PP devices, resulting in dependable, plug-and-play functionality.
Rigorous Testing Ensures Reliable SFP Performance
Every LINK-PP optical module is put through a rigorous testing regimen to ensure that it meets high-performance standards. Additional details are available from the LINK-PP Test Support Center.
Optical Spectrum Test
Ensure that the wavelength is aligned correctly to achieve maximum throughput.
Eye Pattern Test
Confirms strong, error-free data signal clarity.
Bit Error Rate Test
Verifies high reliability with minimal data loss.
Temperature Test
Validates performance stability across a wide range of environmental conditions.
Product Shipping for LINK-PP LS-CW551G-80C 1G SFP
All LINK-PP modules are shipped ready to deploy, protected by secure and anti-static packaging to arrive in pristine condition.
Anti-Static Protective Packaging
Prevents ESD damage during handling.
Shock-Resistant Transport Protection
Guards against vibration and impact.
Fast Order Processing and Dispatch
Streamlined logistics for quick delivery.
Global Logistics and International Delivery
A global network of trusted fulfillment services.
LINK-PP LS-CW551G-80C 1G SFP Usage Demonstration
Thanks to its compact SFP footprint, data rate of 1.25 Gbps, wavelength of 1550 nm, and reach of 80 km, the LS-CW551G-80C LINK-PP transceiver is perfectly suited to enterprise backbones, metro access, telecom aggregation layers, and other modern optical infrastructures.
LS-CW551G-80C Technical Support
LINK-PP provides professional technical support, including pre-sales consultation, compatibility verification, and post-deployment troubleshooting to ensure smooth network operation.
Pre-Sales Technical Consultation
Professional technical guidance to help customers select the most suitable LS-CW551G-80C modules based on network architecture and application requirements.
Compatibility Verification Support
Compatibility checks and validation to ensure seamless operation with Cisco switches and other supported networking platforms.
Deployment & Installation Assistance
Step-by-step support for installation, configuration, and initial deployment to ensure stable and correct operation.
Long-Term Technical Assurance
Ongoing technical support throughout the product lifecycle to ensure reliable performance in enterprise and carrier-grade networks.
A:
A typical 70km single mode span with eight splices and four connectors runs around 22 to 24dB of loss. With launch power near +2dBm and receiver sensitivity of -26dBm, you have roughly 28dB of budget, so about 4 to 6dB of headroom. I would still measure the receive level after installation and keep it below -8dBm to stay clear of overload on very short spans. By
admin
A:
Not on the same pair at the same time. Both modules transmit in the same direction on the same strand, so they would collide. If you want to reuse that strand, put a CWDM mux at each end and move the second service to another CWDM channel such as 1470 or 1490. The 1550 channel here works fine through any standard 20nm CWDM grid mux, and the 1310 link can stay on a wideband port. By
admin
A:
Yes. The module is a fixed 1.25Gbps optical interface with no rate negotiation of its own, so set the port to 1000BASE-X, autoneg off, and it will come up. We test every unit at 1.25Gbps with a fixed rate pattern. DDM is available either way, and the SFF-8472 registers are standard so your NMS should poll it without a custom MIB. By
admin
Good long distance SFP module for enterprise backbone work. The 1550nm channel slots right into our existing CWDM plan and we did not have to touch the mux or the patch panel.
Please write comments with more than three
character.
492834
579791
Z***s
Romania
Verified
Purchase
5 .0
2026-04-04
For anyone doing a fibre to the building build, this 1550nm 80km module is a sensible choice. We paired it with a 4 channel CWDM mux and got four services onto one strand without touching the existing 1310 link. Installation is plug and play, the LC connector seats firmly, and the metal cage does not wobble like some cheap SFPs.
Please write comments with more than three
character.
492834
579795
O***z
New Zealand
Verified
Purchase
5 .0
2026-01-13
This is our third batch for long haul 1G links. What I like is that the DFB transmitter holds power flat across the 0 to 70℃ range, we logged +2.1dBm at 22℃ and +1.8dBm at 58℃ in a hot cabinet. For an 80km CWDM SFP at this price that is honest performance. Only note is the label is small and hard to read when patching in a dark rack. :-D
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character.
492834
579806
S***n
Austria
Verified
Purchase
5 .0
2025-11-20
Used for a 1G fibre link out to a substation. Single mode duplex LC, 80km rating, and the receive power is well inside the -26dBm sensitivity window. Will buy again.
Please write comments with more than three
character.
492834
579802
T***e
Israel
Verified
Purchase
5 .0
2025-09-01
We run a mix of vendors in our access layer, so MSA compliance matters. These came up first try on Cisco, Mikrotik and a ZTE uplink. DDM works on all three.
Please write comments with more than three
character.
492834
579794
A***l
Malaysia
Verified
Purchase
5 .0
2025-07-13
I run a small ISP and use these for customer aggregation over passive CWDM, eight channels and 1550 is ours. The modules have survived two lightning seasons in outdoor cabinets with surge protectors, and the units I pulled for inspection showed no power drift. Bit error testing at 1.25G came back clean over 24 hours. Recommended for budget conscious access networks.
Please write comments with more than three
character.
492834
579808
J***r
Austria
Verified
Purchase
5 .0
2025-07-11
We use these on a 62km span between two metro POPs. TX sits around +2dBm and the far end sees about -21dBm, so there is plenty of margin. No CRC errors in three months.
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character.
492834
579796
A***l
Austria
Verified
Purchase
5 .0
2025-05-30
We deployed 12 of these on a metro aggregation ring where the 1550nm window was the only free CWDM channel left. Over a 68km span with three splice closures the far end RX landed at -20.4dBm, well above the -26dBm sensitivity, so the margin covers a bad splice or two. DDM polling through our NMS works on standard SFF-8472 registers with no custom MIB. Six weeks in, zero flaps.
Please write comments with more than three
character.
492834
579805
J***e
Republic of Korea
Verified
Purchase
5 .0
2024-11-17
Deployed 30 units across a regional telecom aggregation layer. The first thing we check is whether the module reports the correct vendor and part number in the EEPROM, because our provisioning script keys off it. All 30 read back clean. Optical output spread was tight, within 0.6dB across the batch, which makes link budgeting predictable.
Please write comments with more than three
character.
492834
579810
E***r
Spain
Verified
Purchase
5 .0
2024-09-12
Bought four as spares for our metro ring. They negotiated at 1G on both Juniper and Huawei gear with no EEPROM complaints, which is not always the case with cheaper CWDM SFPs.
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character.
492834
579800
C***l
Philippines
Verified
Purchase
5 .0
2024-09-04
Ordered on a Friday, arrived in about a week, and all eight modules tested clean on our bench. Link budget on a 55km span looked healthy with roughly 12dB spare.
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character.
492834
579790
F***l
Sweden
Verified
Purchase
5 .0
2024-08-06
Replaced a pair of failing 1550 optics on an ISP aggregation link. DOM gave us the same readings as the old branded units, so the NOC could keep the existing alarm thresholds.
Please write comments with more than three
character.
492834
579798
J***h
United Arab Emirates
Verified
Purchase
5 .0
2024-08-06
Running these between a core switch and a remote cabinet 40km out. Temperature stays around 45℃ inside the enclosure and the link has been stable right through summer.
Please write comments with more than three
character.
492834
579792
M***r
Iran, Islamic Republic of
Verified
Purchase
4 .0
2024-03-26
Optics work fine on our 70km link, but two of the ten boxes arrived with the antistatic bag already open and one module had a bent latch. It still linked up after straightening. Packaging could be better for overseas shipping.
Please write comments with more than three
character.
492834
579811
E***s
Nepal
Verified
Purchase
5 .0
2024-03-09
Ordered 20 for a rural broadband rollout. Duplex LC patching was straightforward and the modules came up on our CWDM mux without any tuning. Good value for a 1G long distance link.
Please write comments with more than three
character.
492834
579797
A***k
Norway
Verified
Purchase
5 .0
2024-01-13
Bought these to extend a Gigabit Ethernet backbone between two campus buildings over about 47km of leased single mode fibre. The 1550nm wavelength keeps loss low on the older OS2 cable we inherited, and the PIN receiver still reads around -19dBm. We used the DDM temperature and TX bias values to catch one dirty connector early. Solid long distance SFP.
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